science-help

[light lichen]

hello

[glossy dirge]

How to do this?

[covert smelt]

Please help me with this one

[outer wedge]

How did it go from second last step to last step?

[dull gulch]

he has considered a as horizontal

[glossy dirge]

Can you solve the problem I sent above?

[dull gulch]

now, the resultant of a and b makes ALPHA angle with a vector so angle from ground is ALPHA+30

[outer wedge]

I've already got the answer thanks :)

[dull gulch]

I don't think that I have any knowledge of this topic.....sorry 😦

[covert smelt]

@glossy dirge

[glossy dirge]

not clear pic

[covert smelt]

Wait

Is it clear now?

Here I have replaced Delta y with y

[hardy veldt]

I'm working on post lab question 1 and made my claim but I'm not sure how to use my data to support my claim. Does anyone have any suggestions for things I can try?

[jade wraith]

hey does any under/post grad know how to use the Image J software?

[thorny gyro]

anyone studying communication engieering

or else radio science

@everyone

[tacit cipher]

anyone have tips on memorizing scientific names?

[fathom quarry]

hey i need a quick help

i'm doing chemistry, and i was wondering how can i guess the value of an angle between two atoms

in a molecule

especially ozone 'O3'

why is it 117° and not 109,5° as i calculated w my calculator

oh i have it

a non-binding doublet is less repulsive than a covalent bond

if the non binding doublet on the central was a covalent bond, the geometry would be tetrahedron, with 109,5° angles

or here we have a NBD so the angle is >109,5

and angles in a plane triangular molecule = 120°

so here we have 109,5° < ozone angle < 120°

so it's basically 117

thanks me

[thorny gyro]

more repulsive m8....nbd-nbd repulsion>>nbd-covalentbond repulsion> covalent-covalent repulsion...that's why less than 120 degree
also what a cool way of saying lone pair of electrons(nbd)...
and and how did you calculate 109.5 degree via a calculator?...sus

[thorn agate]

hi does anyone have experience using MATLAB/simulink software ? can do process control too,,

[fathom quarry]

i'm french lol here we say nbd

[round knot]

Does anyone knows how to be interested in maths

To learn

[main kestrel]

get a fat maths book, and grind it out

literally

[modest oracle]

I think that's the worst way to get into maths

[main kestrel]

Well, first of all, know what you are studying for, if there are books for that specification, then follow the book, it's pretty simple.

me, myself, a genius.

[modest oracle]

Find YouTube videos that explain the concepts you struggle the most with. It is :

• passive (no reading needed : your focus goes onto the explanation)
• quick (5 to 10 mins usually)
• visual (because it's a video)

And most of the time it goes with live examples, where the teacher (because the vids are often uploaded by teachers) explains and details every step, as well as the thought process to solve the problem

I personally think starting off with reading maths books when you're not familiar with/fond of maths rigor is the best way to get disgusted by maths in general

[main kestrel]

just gotta be a genius innit

[modest oracle]

meh

This world would be boring if we had no access to anything we're not born a genius at

[main kestrel]

https://tenor.com/view/dog-daredevil-how-you-felt-after-saying-that-discord-gif-23423211

[modest oracle]

meh

I can rephrase it if you prefer

You're gatekeeping maths as a joke to someone who asked a sincere question and could take your answer seriously

[main kestrel]

Dude, it was a joke, breath in and out, it's 20:34 rn uk time, go do something productive.

[modest oracle]

I am :)

[lapis sorrel]

Would this be correct for 1a)?

[cunning crescent]

I think you have the order switched up, 1 CH4 is equivalent to 25 CO2, so you should multiply with 25, not divide

It is almost midnight though so don't sue me lol

[lapis sorrel]

I got it no worries thank you 👍

[brave basin]

[thorny gyro]

hey why divide 1.5Gg by 32 that's weong divide by16 to get moles of ch4 and that is equal to moles of co2 emitted and then to get mass multiply by 44...you would be okay if you multiply right and although it doesn't relate to ques the balancing of the equation is wrong remove the 2 from 2o2,

[fading mango]

How and why is this formula different form Q=mcΔT?

And how do we figure out which in situations to apply which formula?

can you say mc=KAt/L? Because Q=mcΔT and Q=KAΔTt/L?

[thorny gyro]

The pic formula is for a metal rod

[wet trench]

Q=mcΔT is used when there is a temp change
Q=mL (L = latent heat of fusion or vaporization) is used when there is a state change (like ice to water etc.)

im assuming 'c' is specific heat cuz i use 's' as specific heat and 'c' as a constant in newton's law of cooling

[fading mango]

This is not the equation I'm talking about.

You learn this in 12th grade so you may not know it yet

If you're in 10th or 11th grade

[wet trench]

yea that might be it

[stable sand]

can you think of reasons why more Complex organisms cannot give rise to new individuals through regeneration?

ans : In complex organisms like animals, specialized cells make up tissues and tissues make organs. All the organs together form an organism. This explains that the degree of organisation in complex organisms is very high. So, these organisms can't be reproduced through their cut body parts by the process of regeneration.
For eg, the cells in a dog's tail is made up of cells different from the cells in brain and heart. So, a cut tail of a dog can't regenerate to make a complete dog.

suggest changes

or rate the answer

[glossy copper]

physics help

A car of mass 1000 kg accelerates on a straight flat horizontal road with an acceleration a = 0.30 m s^–2. The driving force T on the car is opposed by a resistive force of 500 N. Calculate T.

adlkjsalkdjsalkdjasdlkaj

[modest oracle]

F= ma

With F = the sum of all forces undergone by the body (the car) = -500 + T

The reason it's -500 and not 500 is because the force is resistive => it points in the opposite direction of a and F

@glossy copper

[glossy copper]

oooo tytytyty

[fading mango]

yeah this makes sense

[fathom quarry]

lol i just discovered wikiversity.org and it saves my life

btw does anybody is familiar with polar coords ? (phys)

i don't understand the expression of the elementary move

why is there a "r" right before the dθ

i find logical the expression without the r

why is he here

[vestal charm]

YOOOO

An ice skater stands calmly on the skates and glides across the ice until he stops. The weight of the skater is 65 kg. Ignore air resistance.

The friction number between steel and ice is 0.05. Determine the magnitude of the frictional force from the ice on the skater.

How big is the skater's acceleration?

What would the acceleration be if the mass were twice as large?

I need help witht the third question

[modest oracle]

Firstly, these are cylindrical coordinates (polar coords. are limited to 2D spaces)
Secondly, this comes from the Jacobian of the coordinates change matrix, calculus stuff. Not very complicated, but I don't know what your level is so I'll just end my explanation right there. Feel free to look it up if interested

Graphically, it also has a sense

Here's a link to a webpage I found that seems to cover the explanation

https://web.ma.utexas.edu/users/m408s/m408d/CurrentWeb/LM15-4-2.php

Haven't read it's entirety, so I might be wrong, but it seems good enough

[vestal charm]

🍉

That made sense

[modest oracle]

Nah nah forget about it

[vestal charm]

Ok...

[modest oracle]

Sorry, I just ... can't think

Like I ddon't want to take the risk to tell you something false

[vestal charm]

Because this is what the answer tells me, but i dont understand why and how they did it:

[wicked pagoda]

Hey guys, can someone help me with vectors and components on a 9th grade/highschool level? Just dm me

Some stuff I'm confused abt

Regarding components

[whole wedge]

Hey, i can try to help but im not sure i remember that, can u maybe send the issue to here so that its easier for me or for someone else to help u?

[wicked pagoda]

Ah yeah sure. It's more that I am unable to understand the concept of components

Wait I'll send a picture

Sth like this

[whole wedge]

Well i honestly dnt feel able to help u im sorry because what i know is kinda hard to explain in english what i know tho is that u have like a "strenght"/ force (idk how to say it in english) and if it isnt in x or y axis u need to like decompose them so instead of having one force u will have two one in each axis and that way u can make the counts

And because cos is equal to the adjacent side dividing by the hypotenuse u have v cos of the angle

[fast frigate]

Can someone help me figure out how to calculate this Physics problem?

A 500 m long wire with a diameter of 5.2 mm will be replaced by another wire where the specific resistance is 1.5 times less. How many times is the resistance of the new wire higher? (answer: 0.667)

[modest oracle]

Well resistance of a wire is directly proportionate to resistivity (what you called "specific resistance")

Therefore, if new_resistivity = 2/3 old_resistivity, then new_resistance = 2/3 old_resistance

That's it

(Because 1,5 times less = 1/1,5 times = 2/3 times)

[quartz horizon]

can anyone that knows python help me with this?

[outer flicker]

can someone help me with highschool physics?

several probs

A biker travels up a steep road with a 13 degree incline. If he has a constant speed of 24 m/s what is the horizontal component of his velocity?

[ripe stirrup]

Um hi, so what is the function from y of y=x^2?

[thorny gyro]

24 cos 13

[outer flicker]

thanks! last one for me "A pitcher for the Ray HS Baseball team throws a ball horizontally that reaches a height of 0.8 m and lands 18.6 m away. What was the horizontal speed of the pitch?

[cunning crescent]

anyone have any good resources for understanding term symbols?

[craggy jolt]

anyone here appearing for JEE? if so i need some advice

you can just dm me there

[stable sand]

Which of the following is not ultimately derived from the sun's energy?
Geothermal energy
Wind
Nuclear
Bio-mass

I can't decide between Nuclear and Geothermal...
Both of them are not related to sun or sun energy

[cunning crescent]

There's only one option?

[stable sand]

correct one is only one, dunno which

[cunning crescent]

Huh, how odd. I have a vague memory of geothermal energy being mentioned as an energy source that isn't dependent on the sun, but I can't think of a reason why nuclear energy is derived from the sun... I'd ask your teacher for an explanation

[floral spade]

Anyone here to help me with Lagrangian mechanics? Or just guide me to a resource?

[opal hemlock]

What are the configurations of chiral carbons? help 😦

[thorny gyro]

Can I have help pls

This is due tomorrow and I’m really panicking and anxiety and scared.;(

[cunning crescent]

<@&717391911132069929> scam link

Stearn CornMunity lol

[cunning crescent]

Hi, since this is about a lab experiment you're going to do, we can't really help you as we don't know your experiment. But, speaking from experience, lab often isn't as bad as it might seem the night before. Just do your best to answer any questions and be prepared, and ask your lab leader if you're wondering about something, you are after all there to learn :)

[half edge]

For a electromagnetic measuring device with the following characteristics:

• When a current of 1 mA is applied to this device, the indicator needle of the measuring device is only 40%.
  maximum rotation angle.
• When a voltage of 10 mV is applied to the two ends of this device, the indicator needle of the measuring device is only 20%.
  maximum rotation angle.
  a. Determine the Ifs and Rm parameters of the measuring device.
  b. Use the above measuring device to design a DC ammeter with 3 measuring ranges: 10 mA, 20 mA, 50
  mA according to the Shunt Ayrton method. (Draw a picture of ampere meter, write full information about measuring range and
  calculate the required resistor values)

can sb help me?

[thorny gyro]

Can anyone help me convert the formula? I need to look for Q2

is this the formula of average velocity

or average velocity = (initial velocity + final velocity)/2

[modest oracle]

Yes, because it is a weighed average, which means it actually takes how long you stayed at what speed into account (via the difference of position in a certain amount of time), whereas the second one doesn't

[cyan prairie]

number of body diaginals present in hexagonal closed packing

[thorn karma]

The board of a wooden horse carousel performs 60 laps in 5 minutes. It is animated by a
uniform rotational movement.

1. What is the angular speed of the plate, expressed in rad.s-1?
2. Calculate the speeds of two wooden horses located 3.0m and 5.0m from the center of rotation.
3. Calculate the distances they cover in 5.0 minutes.
   please help me

[dense jewel]

if im not wrong

ignore the below stuff lol

[wicked pagoda]

@dense jewel your handwriting is so pretty

[dense jewel]

aw thank u :)

[fathom quarry]

hey i need ur help

how can i evaluate the distance between B pos 0 and B pos 1 ?

i specify A and C motionless

for B pos 1 , AB = BC

but they’re not for B pos 0

[winged horizon]

can someone pls help me with some chemistry problems

[fathom quarry]

maybe i can, show me?

[winged horizon]

thank you! ill first translate the probblem to english

An organic compound has the chemical formula C7NClH8M. The metal atom M represents 14.5% of the total weight. Calculate the atomic mass of M.

2. The gases released after the combustion of 1000 ml of a gaseous hydrocarbon at a certain pressure and temperature are passed over CaCl2 (absorbs H2O) and then through a KOH solution (absorbs CO2). Weighing shows that CaCl2 absorbs 3.825 g and that the KOH solution absorbs 7.480 g. Determine the chemical formula of the hydrocarbon compound, if the volume of 1.360 g of O2 at the above temperature and pressure is also 1 l. Solution: C4H10

original

[cunning crescent]

This first one is basically a math problem, find the atomic masses of the other components, and then make an equation of M = 0.145*(mass of known components + M)

[winged horizon]

o okay thanks and do u know hown to do the second one?

[worldly sierra]

Would you look at my two questions?

[cunning crescent]

C

That's a reduction at least

[worldly sierra]

Well, what do you think of the other?

[cunning crescent]

Don't rememver

I dont remember what E0 is, if it's reduction or oxidation. I'd look into that, it's either t he first or last one

[worldly sierra]

Okey, thanks. :)

[trail shore]

Any Indian Science Student here? :/

[glossy copper]

how to arrange ΔQ = m⋅c ΔT for c

[modest oracle]

Divide both sides by m dT (d = delta)

[unreal oxide]

does anyone understands college thermodynamics here? im having trouble understanding it intuitively and figuring out which equation to use at certain conditions ect :/

[dense jewel]

can 2 methyl-phenol undergo free radical substitution?

[trail shore]

Yooo, that handwriting dayummnnn

[dense jewel]

lol thanks

[dense jewel]

i think it shld be the 1st one/ Ti2+ cause if its the best reducing agent, it will be easily oxidized compared to the rest. By right, more negative E0, it gets oxidised more easily but i don't know the reason in terms of electrons

[whole wedge]

Hi, the question is what is the trajectory described by the particle and between the options is straight, parabolic and constant radius curvilinear, I know that straight is not but how do I know between parabolic and curvilinear. Can someone help please?

[celest gorge]

curvilinear would mean any type of curved path, whereas parabolic is a particular type of curve. so if it satisfies the eqn of parabola then the answer is parabola, else if it does not satisfies the eqn, then it would be curvilinear. ( path of constant radius, i.e. circle is also curved path.)

[whole wedge]

thank u so much, how do i know whether it satisfies the parabola equation tho? is it just having x^2?

[celest gorge]

y=x^2 is one of the simple parabola along y axis, there are also other eqns of parabolas (like x=y^2) . you can look at this reference for general equation. https://www.cuemath.com/geometry/parabola/
(y=x^2+c would parabola along y axis shifted c units above origin.)

[whole wedge]

thank you! I will check it out

[thorn karma]

Thank youu ❤🔥🔥🔥

[dense jewel]

welcome :)

[umbral galleon]

hess law, do i have to multiply (insert number) to the reactions??

[nimble pasture]

anyone here tutor ochem?

[dense jewel]

u dont have to for this qn but i think u gotta divide half for the moles to be 1 in the end

[umbral galleon]

wanna teach me how to solve this?

[dense jewel]

oki gimme some time

if im not wrong @umbral galleon

[umbral galleon]

its like this

[dense jewel]

wait am i wrong- HAHHA

[umbral galleon]

yeah

[dense jewel]

whats the ans

[dense jewel]

i think we use diff method

[umbral galleon]

what did you use?

[umbral galleon]

i said here hess law so i solved the enthalpy change with hess law

[dense jewel]

i used hess law tho i think ur sch's way of using hess law is abit inflexible idkk

[umbral galleon]

then why is it the same with youtube vids?

[dense jewel]

idk but this is what i learn

[umbral galleon]

sorry for wasting your time :0

[dense jewel]

nah its aaightt

[cedar swan]

Why does NaCl make a yellow fire when burnt?

[whole harbor]

can anyone call and help me with circuits

need help as soon as possible

[tulip knot]

hahah a levels uhh

jiayous a levels on monday

[tulip knot]

Need help with v)

[thorny gyro]

Huh? I think you replied to the wrong person

[modest oracle]

Yeah I totally meant to reply to the message below, sorry x)

[thorny gyro]

Np 🙂

[real shoal]

i think bc OH is a polar bond and prefers to be attached to a terminal C atom, sterical hindrace as well

OH generally takes up more space compared to a single Br atom

Btw, I also need help :)) i'll be tested on the krebs cycle + proteinogenic amino acids tmrw for biochem, but i've been procrastinating.. any tips for useful resources to memorize fast?

[frank basin]

Hello is there anyone who knows how to make a simple astrolabe thankiesss

[quartz yarrow]

Tp learn the amino acid, I heard about apps, but for me, I first classified them (Neutral charges, positive charges, negative charges at a Ph=7) and after that I wrote them one by one, Exemple Lysine, i would copy that once, and try the rewrite it without looking at the lesson. When i learned three or four, i would try to rewrite them again in a different order

It's not really fast but it works, i remembered for the semester (forgot them during summer hahaha)

[cinder geyser]

I have a motion problem 8n physics where something with a weight of 80n is being pushed with a force of 15n and its asking me to find acceleration. In this case do I convert the weight into kg to solve using f=ma or does the fact that weight and mass are different mean that won't work for getting the right answer

[modest oracle]

Weight and mass being different doesn't mean they aren't linked. There is the formula w = g*m after all

So yeah, you're supposed to use w to get the mass, which leads you to :
a = Fg/w

@cinder geyser

[cinder geyser]

Oh okie

So I divide the weight in newton's by the acceleration of gravity to get kg and just use f=m*a normally then?

[modest oracle]

Yup

[real shoal]

thank you so much!!

[left idol]

Can you guys ping me when answering the question, when we use the stock system of nonmenclature,
For example:
Fe^2+ is written as iron (II)
how would we know when to use the parentheses and roman numerals? I suspect that it would be for transition metals or cations but do not have a clear answer? Thanks!

[thorny gyro]

you will be using the "roman numeral" part when using metals that have more than one valency
EXAMPLE : as in the case of copper
Cu (I) (cuprous)
Cu (II) (cupric)

hope this helps!

[left idol]

When you say valency you mean amount of valence electrons correct? So that phrase would be "more than one valence electrons"

[thorny gyro]

no
they have "varying no. of valence electrons"
that results in "varying valency"
like:
one day you have 2 pencils and another day you have 5
so "your no. of pencils is varying"
pencils = valence elctrons

also, pls ping me, otherwise i might miss your query 😅

[near copper]

Yo anyone here know transcription and tRNAs

[weary wasp]

how do you efficiently synthesise m-aminophenol from benzene. This is what I've come up with. Does it work. Is there a better way

[cunning crescent]

Does anyone have any good resources for basic definitions of defects in atomic structures? Like schottky, Frenkel etc

[finite shore]

hey can anyone help me with this question? kinda stuck here lol

[rare pine]

Use The law of momentum conservation

[distant barn]

Assumption is collision is perfectly inelastic. Not enough information for any other type of collision. Then you do m1v1 + m2v2 = (m1+m2)vf.

You can also say the assumption is that the collision is elastic but that’s very unrealistic given your problem. However if that is the case, you can do conservation of momentum with conservation of kinetic energy; a system of equations with two unknowns and two equations

[thorny gyro]

how to remember all the kingdoms, phylums, subphylums and their properties.

Does anyone have any idea?

I always for get them!

[bright hornet]

flash cards have been effective for me on one side write the phylum name and on the other write all its properties and revise it for 10 mins like daily!

[distant barn]

to remember the names/order you can make an acronym, but for their properties u should do flash cards like swaggy said

[fickle spruce]

Can anyone help me with this que

[finite shore]

Thx so much

[finite shore]

Thx too

[thorny gyro]

Guys can u help me out

Is this right

If so can u explain it

There’s only one oxygen with double bond to C but there is 4 now for the products made

Anyone?

Either on here or dms thank you

[floral spade]

Heyy guys, can someone explain to me why they put v=r.dθ and not v=dθ? I think r.θ is the trajectory of the masse and not it's position

[manic fractal]

as v = dx/dt not dθ,, linear velocity = r * angular velocity

[floral spade]

thank you

[thorny gyro]

Is there a good way to remember valencies of elements ?

[hallow palm]

for me it just came through practice. solve all the sample questions you have regarding valencies. at first you'll need to look back to see the values, but eventually they'll just get imprinted in your mind. slow and steady!

[thorny gyro]

Ight , thank you so much !!!!

[hallow palm]

hope it helps :)

[thorny gyro]

if you remember the periodic table in order it is easy to find valencies@thorny gyro

Oo

i'll do that

[sullen iris]

im doing a conjugation with a Pseudomonas putida f1 and Raoultella ornithinolytica sp. TNT as receptors, an E.coli DH5α (with egfp-plasmid pMP4655 Tc-resistance) as donor and a helper E. coli DH5α (with helper plasmid pRK2013 consists of the RK2 transfer genes and ColE1 replication origin, km-resistance). We are using minimal medium and TNT but i dont really uderstand how exactly my transconjugant gets selected in this medium. Can someone help me? Thanks in advance!

[unreal hamlet]

anybody know ac current here?

i want to ask a question

[modest oracle]

Ask it right away. Someone will answer :D

[unreal hamlet]

ok

whats the answer

i was wondering if the options are wrog

[dense jewel]

HAHAHHAH

[unreal hamlet]

did you find out the answer?😂

[dense jewel]

idk how do HAHAH my guess is b

[dense jewel]

@modest oracle wat ur ans

[unreal hamlet]

..

[loud rivet]

it should be 3 A

ie B

[unreal hamlet]

Ye i divided 141.4/1.414 as 10

So I was getting 30 A

[loud rivet]

V=100√ 2 sin(314t+pi/3)
now Vrms=Vpeak/√ 2=100√ 2/√ 2

=100

[unreal hamlet]

👍

[tough pendant]

hi

if anyone could help w these questions that would be great cuz i have no idea how to do them...

[rancid badge]

I need help with newman projections
3-methyl pentane(C2 – C3)
I dont know how to do 😦

[loud rivet]

you need to draw em?

maybe this might help

[fossil pawn]

Hello hello 🙂

I want to make sure that i'm not doing something bad, so if i make mistakes, please tell me :D

I'm developing a web server for my family that save in a database the energy consumption (in Wh) of the house.

Each second my sensors tell me how much energy (in watt) I consumes (the picture show the consumption during 90sec) and my server save those values in a database.

• First of all, can we say that those values that i received each second are in W/s?

If I'm correct and the values that I received are in W/s, then I can convert those values in Wh by dividing them by 3600 (second -> hour). Or is it better to let them in W/s?

Then when I want to know how much energy my house consumed in a real hour, I just need the add all the values in the hour. (and if it is in W/s, i just need to convert them in Wh)

am I correct ? 😄

PS: don't judge me too hard please, the last time i had such "problems", that was more than 5 years ago

[rancid badge]

thx ❤️

[sudden trail]

Hello
chemestry help needed, im tying to figure out how i can use standard reduction potentials to find the equalibrium constant for a few reactions
one of them.. Br2 + 2l- -> 2Br- + l2
Does anyone know?

[thorny gyro]

you want it in reduction

like this

2 Br0 + 2 e- → 2 Br-I

[sudden trail]

to find the reduction potential?

[sudden trail]

Finding the reduction potential i get, but im not sure where i go from there
i found this article, but im struggeling still https://www.chem.purdue.edu/gchelp/howtosolveit/Electrochem/Equilibrium_constant_free_energy.htm#Equilibriumconstant

[thorny gyro]

no that is the reduction potential

oh i see

[cunning crescent]

After you find the reduction potential of the full reaction, you'll have all the info needed to find the constant, by changing the order of the Nernst equation.

Can you maybe explain in more detail what you need help with?

[rancid badge]

What would be the nomenclature of this compound?

[willow lion]

Friction, Air Resistance, and Tension are non-conservative forces right? (just confirming)

[distant barn]

correct

[fading leaf]

can anyone help me out with this problem?

[wanton bone]

Quick question

Which one would break first?

[modest oracle]

It depends on the physical properties of the objects. Here, you made no hypothesis (system conditions) about these, so answering this question is difficult. By default, I guess none would break, since you seem to be using the simplest rigid body model, which only cares about forces, position and its derivatives (velocity, acceleration), but not about the bodies' physical limitations

It's just like drawing a random closed curve, noting a little "Not on scale" next to it, then asking for its area without giving any reference length : we don't have enough info to answer

[wanton bone]

lets say they all the same except for the length

[modest oracle]

I'll just randomly guess the shorter one for most materials, since each molecule undergoes more tension

Or both at the same time

Idk

[wanton bone]

hmmm...aight. thanks

[charred turret]

Need help with question 9 pls. On how to calculate the resistance in this particular case.

[royal loom]

So I’m not 100% sure but I think you do 1/30 ohms plus 1/14 ohms (add 6 and 8 and then do 1 over that) plus 1/15 ohms (add 5 and 10 then do 1 over that) and then you add them together.
So 1/30 + 1/14 + 1/15 and then flip that to find total resistance
I hope this is right I’m sorry if it’s wrong

[ruby sequoia]

i mean tbh i should've gotten this question right b./c i love cats but...

why is answer choice c correct?

i just guessed for this one.

i put b just cause a cant be true.

if they were both homo, then then you'd get all cats have short hair.

btw in need of urgent help b/c exam is tomorrow

[ruby sequoia]

yeah that makes sense thanks

[thorny gyro]

we know the female is heterozygous...why ?because she's short haired and were she homozygous then all of her offspring would have been short haired coz that allelle is dominant and since that is not the case (2 of her offspring are long haired) we are 200% sure that the female is heterozygous
the above explanation didn't seem right so i answered.

[obtuse crane]

guys i need help in my physics

In a laboratory experiment, a 20 kg metal ball is intended to swing down from a ledge (starting at rest) using a massless rope that is 5m long. Since the ledge is near the vertical such that the rope makes a small angle with its equilibrium position. At the lowest point of the swing, the ball will be released and will be dropped a short distance to the ground.

(a) How long after the initial swing will the ball first reach its lowest point?

(b) If the ball missed the first chance to drop off, how long after the first swing will the ball reach its lowest point for the second time?

[quartz zealot]

A hint: Since we are informed that the given angle is small, we can probably simplify sin(x) = x. Have a look at this page: https://courses.lumenlearning.com/physics/chapter/16-4-the-simple-pendulum/

[uncut sable]

Element P has 16 protons and its nucleon number is 24. What is the electron configuration for element P? *

does anyone knows how to do this

[normal coral]

1s2 2s2 2p6 3s2 3p4

[normal coral]

^^

[hallow palm]

I can solve the 2nd part but the 1st part comes out as an approximate value, not exact sorry

[uncut sable]

yo thank u

[hallow palm]

ok wait I figured out the resistance too lemme send. the keyword here was "external"

[hallow palm]

hope this helps!

[faint spade]

is anyone availble? i think i need some clarity in a physics problem

[loud rivet]

(2S,3S) 3-Ethyl-2,3-dimethyl-2-hydroxy-4-pentenal I think

not sure

[sacred pulsar]

a. 20
b. 35
c. 1.5

[sacred pulsar]

Which one??

[ruby sequoia]

thanks for ur help man much appreciated

[fallow marsh]

Hi, I need your help

How do you calculate DC offset?

of a sine wave

Determine mathematically, step by step, without skipping any step, the rms value
(R.M.S.) and the mean value (D.C.) for the following signals:
a) Symmetric sinusoidal of 8 Vpp at a frequency of 1Khz.
b) 8 Vpp sinusoidal on a D.C. level 3 Volts at 1 Khz frequency.
c) 8 Vpp sinusoidal over a D.C. level -3 Volts at a frequency of 1 Khz.
4. Assemble a series circuit of three resistors: 1 kΩ each and apply to this
circuit, each of the above signals and calculate:
a) The value of the voltage drop (D.C. and a.c.) in each of them.
b) The current (D.C. and a.c.) that circulates through each of them.
5. Assemble a parallel circuit of three resistors: 1 kΩ each and applying to this
circuit the same signals as above, calculate:
a) The value of the voltage drop (D.C. and a.c.) in each of them.
b) The current (D.C. and a.c.) that circulates through each of them.

[sacred pulsar]

is it correct? pls confirm

[glossy copper]

how plss

[whole wedge]

Is the answer 777.778 by any chance?

[glossy copper]

I wouldnt know 😭😭😭😭

how did u get it?

[rancid badge]

An isolated population consists of 40,000 individuals. Knowing that its annual biotic potential is equal to –10 individuals / 100 individuals, calculate the time that it will take for this population to decrease by 25%. ?

What formula should I use to solve this ecology exercise?

[whole wedge]

Well i really aint sure if what i did is correct thats why i didnt say it right away but basically i took the expression deltaE=mc delta T and when deltaE is 450 m and deltaT are both 1 and so i concluded that c=450. Therefore 4.2×10⁶=m* 450* 12 and from there i got m. I dnt know if this is right tho

Because if this is right then E should also be resolved in order to c i think, idk im sorry if im telling u something that is wrong

[warped fog]

do anyone have a edu file about circular motion physics?

and maybe periods system of elements too

[daring canyon]

For anyone interested, I have a bunch of translated Soviet-books on science topics, such as physics, and my major: geo-sciences. So, if there is any topic, I might be able to help you with some additional reading material! :>

[cunning crescent]

does anyone have any examples of phosphorescence and fluorescence you can experience in an everyday situation? I can't think of anything, and googling gives mostly definitions and scientific use

[daring canyon]

Maybe I'm stupid, but some toys are phosphorescent; you can see them glowing in the night. As for fluorescence, some minerals are fluorescent, and some animals (jellyfish). Also, idk why, but I have this light switch which is phosphorescent, which can be seen after switching the light off. Source: dude trust me Alternative source: https://www.majordifferences.com/2016/11/7-differences-between-fluorescence-and-Phosphorescence.html

[cunning crescent]

ahh thank you. Maybe not everyday stuff for me but definitely clear examples, thank you 🙂

[daring canyon]

You're most welcome!

[hallow palm]

does anyone have any methods to remember the menstrual cycle? I'm having a hard time memorising when which hormone is released and all that

[haughty gale]

4. Consider a mercury (coefficient of volume expansion is y) thermometer. It has a cylindrical bulb of volume V and

column in capillary when temperature is increased by A0. Neglect the expansion of the glass. Also assume that the

radius of capillary is much smaller than that of the bulb.

a capillary of internal radius r connected to it as shown in figure. Calculate increase in the length of mercury

[thorny gyro]

Does anyone have any ideas about the cases where the kinetic friction coefficient is greater than the static friction coefficient?

[outer walrus]

I don't think that's possible in any scenario

You can read this for a further explanation

https://physics.stackexchange.com/questions/541/can-the-coefficient-of-static-friction-be-less-than-that-of-kinetic-friction

[brazen gale]

The elements from 93 to 103 of the lanthanide series of a periodic table that are all radioactive in nature, are synthesized artificially and are placed after Uranium (U⁹²) are called thransuranium elements.

Can someone like fact check this definition and tell me if it is appropriate to write for exams

[sacred pulsar]

Well, maximum static friction is the largest frictional force any body can experience, and kinetic friction is always less than that. But as static friction is a self adjusting force, so till it attains the max value its value can change. And always μ(static) > μ(kinetic). So, I think there exist no such case where the coefficient of kinetic friction is greater than that of static friction.

[brazen gale]

Someone? Does no one here knows the answer of a highschool chemistry question

[rancid badge]

I have to draw this aldotetrosa as a Fischer projection, but I can't draw it since I don't know how to do it

[vagrant parrot]

Can anyone help me on how to solve these two questions

[cunning crescent]

1. Find how many moles of iron(III) hydroxide is made per mole of sodium hydroxide. The clue to this is the numbers before each reactant. 6 moles of NaOH would make 2 moles of FeOH3, so how much does 1 mole then make?
2. I'm going to assume the sulphuric acid protolyzes completely, and in that case you have to first find how many moles of hydrogen are in 0.05 mol sulphuric acid, and then convert it to grams by using the molecular weight of hydrogen

[vagrant parrot]

🤩 🤩 🤩 thank you so much @hallow palm @cunning crescent
This has really helped me alot

[velvet flower]

Can anyone help me? In one of my chem exercises we had to compare different kind of ions in their volume and order them from the biggest volume to the smallest volume. All the ions had the same amount of electrons, but different amounts of protons. My teacher told me that the higher the amount of protons, the bigger the volume... But i don't really understand WHY this is... Can anyone help?

[slate folio]

If any Aerospace / Physics (for first year students) know a good site source of past papers or summary sheets. Lmk. Ty

[thorny gyro]

Can someone help me understand why B has 2V?

[quartz zealot]

Try to think about how much volume each of the gases A and B need. Use the ideal gas law. Remember that temperature, pressure, and the gas-constant are the same for both gases.

[cunning crescent]

Well, protons have mass and take space. So more protons will give more volume, because 2 protons take more space than 1

[thorny gyro]

Okay, understood! Thank you!

[thorny gyro]

Can someone please help me understand the solution or just explain how to solve this question?

[flint mauve]

Anyone have any study tips for Organic Chemistry? How do you even study for it lol

[cerulean field]

https://media.discordapp.net/attachments/877411292774797335/900199613976420362/image0.gif

[thorny gyro]

<@&717391911132069929>

[alpine glen]

the organic chemistry tutor

on YouTube

[summer cliff]

easy your aldehyde is the groupe which is the more oxydated. It will be on the top, the first C. The CH2OH is the last. For de hydroxyl groups every OH that is down to the chain will be at your right. C2 contains a OH that will be at your right and C3 a OH that will be at your left.

@rancid badge

@rancid badge

the arrow = aldehyde group

that's Fischer projection

[summer cliff]

I buy a book by Klein that's very great to begin.

[rancid badge]

THANKS SO MUCHO ❤️

[summer cliff]

sorry for my english x)

[thorny gyro]

Hi! Can someone please help me out with this question & also provide some explanation with the solution?

[thorny gyro]

I think correct answer is D. First sum "infinite series of volume" V + v/2 + v/4 ..., The sum of this series is 2V. In first flask the pressure is 2P but if it whatever is inside was realesed to 2V volume pressure will change to 1P, in second flask pressure is P but volume get to 2V so 4 times larger so our pressure is 4 times lower P/4, then for third volume becomes 8 times larger and pressure 8 times lower so P/16, as you can already see you will get a series of P + P/2^2 + P/2^4 + P/2^6. The sum of this series is 4/3P

@thorny gyro

[finite nimbus]

Hey!
Can someone please help me with those chemistry tasks?)

1. When burning 8 g of an unknown substance, 7.79 liters of carbon dioxide (at normal level) and 9.39 ml of water were obtained. Determine the substance if its molar mass is less than 60 g / mol. In the answer, indicate the formula of the substance.

2. The N2O4 was heated to 30 ° C, after which a gas mixture with a helium density of 20.5 was formed. Determine, to the nearest integer, how many percent of N2O4 has not decomposed

3. A mixture of two metals with a mass of 20 g was dissolved in an excess of sodium hydroxide, while 45.3 L of gas (NU) was evolved. When the same sample was dissolved in an excess of hydrochloric acid, 45.98 L of gas (n.u.) was released. Determine the mass fraction of metal (accurate to whole), contained in a smaller amount.

[ionic glacier]

Make a calibration curve of std. 0,5,10,15 and 20 which when measured give you 0, 4.8,
9.4,14.5, and 19.8 values. Show R2 value and if it is < 1 how you can improve this?

Write a scheme for the gravimetric determination of Sr with ammonium oxalate (NH3C2O4) and
SO4 with BaCl2
What will happen to the solute if the Henry’s law constant of the analyte is less than the Henry’s law
constant of the solvent.

[rancid badge]

A population in which there are no migrations is made up of 50,200 individuals. Knowing that 10 years earlier there were 50,000, calculate the annual biotic potential of the population assuming that it has remained constant throughout the decade.

What formula should I use?

[thorny gyro]

are you sure for the first problem we have liters then ml?

im trying to solve it but it doesnt work bcs those are different and when i transform the numbers dont work

[thorny gyro]

idk what biotic potential is but this is what i came up with
maybe it s useful :)))

[tacit meadow]

Hey, I'm struggling with this question. Not sure what to do.

[finite nimbus]

Yea, that was in test

[thorny gyro]

well this is how i would do it but the fact that the units are not the same is bothersome

if the units were the same, the ecuation would work nice

[finite nimbus]

Ok, thank you))
I'll try to figure out what with units

[thorny gyro]

if you take the same unit (both liters or both mililiters) you no longer have that 10^3 and the end is easy

Anyone here brillinat at chemistry and willing to help me with an exam I have in 10 hours? I just need to get lik a 40

[smoky stirrup]

Please message me if ur good at physics/calculus. I really appreciate any help. I'm a medical student from England, currently 21 years old

[stable spruce]

does anyone know if when i'm solving for tᵤₚ if i use 9.81, -9.81, 9.81², or -9.81² as gravity?

I'm trying to do homework and i'm not sure which to use

im just gonna go with 9.81 and hope my grade doesn't drop lol

[young quarry]

9.81 m/s^2

[stable spruce]

thank you so much

[young quarry]

np

[woven kraken]

Hi I wanted to ask what would be the rankings of butan-1-ol, butan-2-ol and methylpropan-2-ol from most soluble to least soluble in water and why? thanks

[agile spear]

can someone plz explain schroedinger's wave model to me??

[uncut sable]

hi does anyone know how to do this

[balmy nexus]

Hey! Bromine-79 just means that the mass number of the atom is 79 (=number of protons+number of neutrons). Since, they are the same atom (i.e. Bromine), they must have the same number of protons. But since they differ in the number of neutrons, their mass number is different. Therefore, they're isotopes (same no. of protons, different number of neutrons).

[craggy jolt]

how was your exam

[rose pulsar]

hey can i ask a quick question since i forget things easily does Fe react to CuSO4?

[uncut sable]

thankyou!!

[thorny gyro]

yes

[rose pulsar]

thank you

[thorny gyro]

Task
Consider the following situation in a vacuum: Electrons pass through a small opening E at a speed of 7-10⁶m/s through a plate capacitor with the polarity marked below (safe sketch). Calculate the voltage on the plate capacitor at which no electrons emerge through the small opening A

Can someone just say if I have to Set the cinetic energy ≠ 0 and the potentiel energy = 0

Or can someone explain in General when I have to Set the different energys = 0 or ≠ 0

[thorny gyro]

Thanks!!

[karmic barn]

Hi I was wondering if anybody would have good scientific article examples of writing a methods section using Koshs postulates in a microbiology lab report

[native hatch]

If we’re asked what’s the effect of forward biasing on a pn junction diode? Can we write that during forward biasing maximum current flows through the pn juntion?

[cunning crescent]

Does any biology students (or similar) have some tips on how to learn and memorise a large quantity of information?
Biochemistry is gonna kill me🥲

[hallow palm]

I use summary type notes in which I try to condense information into diagrams and charts, making it as compact and small as possible. and the concepts that don't fit into this system (random facts you have to memorize etc) go into being flashcards.

can someone explain to me how to do this? it's a question from genetics (linkage part). the answer is option 3 but I don't know how

[swift glade]

Does any biology students (or similar) have some tips on how to learn and memorise a large quantity of information?
Biochemistry is gonna kill me🥲
@cunning crescent anki is good to this

[cunning crescent]

@hallow palm @swift glade thank you both!

[karmic barn]

Hey woucl anybody in chemisty help explaine how to solve this equation?

Coal power plants burn large amounts of coal, C(s), in an O_2(g) atmosphere to generate electricity. The chemical reaction responsible for producing this energy is shown below:
C(s) + O_2(g) → CO_2(g)
Determine the mass in grams of CO_2 produced when 1.07E+2 metric tons of C(s) are completely burned in an O_2 atmosphere (1 metric ton = 10^3 kg = 10^6 g). Don't include units in your answer

[cunning crescent]

Since C and CO2 is 1:1, what you need to do is find how many moles are in that weight of C, and then multiply that number with the molecular weight of CO2, and you will have your answer.

Ping me if you need a more detailed explanation

[karmic barn]

thank you

[uncut sable]

Hi does anyone know how to claculate this one

[cunning crescent]

Didn't you post this question here earlier too?😅

[uncut sable]

oh yes, the guy explained why both atoms are isotopes. but im not sure how to calculate this one

[cunning crescent]

Ah okay, well, since they both have the same number of protons (and electrons) since they are isotopes, Bromine 85 must have 6 more neutrons than bromine 79 in order to make up the difference in weight

[uncut sable]

hmm so is electron 35 or 36

[cunning crescent]

The amount of electrons will be the same for both atoms

Electrons aren't really relevant for isotopes as they don't contribute to molecular weight. Since they're neutral atoms, the number of electrons will be the same as the number of protons. And since they're isotopes, they will have the same number of protons. The only difference between them is the amount of neutrons

[uncut sable]

number of electrons = 35 , number of neutrons = 85 - 35 = 50?

[cunning crescent]

Yes!

[uncut sable]

got it! thankyou!

[cunning crescent]

Happy to help :)

[sleek fossil]

I m studying Ped GI abnormalities , the nvme questions , if any1 wants to do together / discuss lemme kno

[sleek kelp]

Assume the coil in a galvanometer is 2.1cm high and 1.2 cm wide and has N turns
mounted so it can rotate in a uniform radial magnetic field B = 0.237. if a current of
100μA, suggest value N coil for the torsional (T) equal to 1.45E-6.

i need help with this question pls

[outer lily]

guys i needed some help in organic chemistry

i have two tests day after tmwr for math and physics

and my chem teacher gave me hwk

i really need help rn, if anyone could help i would be incredibly grateful

[scarlet galleon]

Ikr you from india , preping for jee ?

[thorny gyro]

Exam actually went pretty well, I'm pretty confident i at least got a pass

[craggy jolt]

ayy nice :Dd

[vagrant pelican]

Can someone help me with this? I used the equation Q = mcdeltat, but I got an answer that’s not even an option

[normal tide]

Q=100×0.214×(321.6-296)=547.84~548 cal = 0.548 kcal

[vagrant pelican]

Ohhh okay, so 1kcal = 1000cal?

Tysm btw!

What about this one?

[gusty bloom]

.) You are standing on a roof in the mathsci building 46.0 meters above the ground. Your physics teacher is 1.3 m tall, is walking towards the building with a constant speed of 1.56 m/s. If you wish to drop the egg on your teacher’s head, where should your teacher be when you release the egg?

help

[frank sorrel]

idk what the ans is but what lang is it btw

[outer lily]

yeah can u help me out bro lol

[scarlet galleon]

Huh which standard are you in ?

[outer lily]

11

[scarlet galleon]

Me 2

From where you getting coaching ? @outer lily

[outer lily]

personal tutor

which state u in?

[scarlet galleon]

Ohh ok , me from allen,kota

[scarlet galleon]

Am from haryana

[outer lily]

oh im frm delhi

[scarlet galleon]

But taking coaching in kota , raj.

[outer lily]

oh nice

have u done organic chem yet?

[scarlet galleon]

Yup

Whole GOC , some part of isomers

[outer lily]

ohk

can u plss help me a bit with the naming of these

i studied this 2 months ago and forgot

[scarlet galleon]

xD

[outer lily]

and i have test for math on monday

[scarlet galleon]

I have a mock test tomorrow 😚

[outer lily]

ah ok

[scarlet galleon]

I can help you tomorrow 11 am or later !

[outer lily]

ok pls do

thank you sir

[thorny gyro]

Guys i want to study astronomy and i need good sources
Any one can help,plz?

Btw i'm first year electrical engineering student

[vagrant pelican]

What language? It’s English

[vagrant pelican]

how do you know what ionic compounds are soluble and which ones are not?

also can someone help me with this?

[sleek fossil]

I’ll give u a hint , molar weight of koh is 56 and 112 figure is in question

[unreal oxide]

find the OH- concentration. hint: H+ concentration x OH- concentration equals 10e-14 M

[vagrant pelican]

i found the number of moles and then divided by the volume to find molarity, but I got 2.0 x 10^-4

ohhh i should multiply it by 10^-14

[sleek fossil]

Stop when u reach h concentration, no need fr ph

[vagrant pelican]

ahh rightt

i should be dividing

i got it

ty

for this, what's the difference between the formula and typical compound?

[sleek fossil]

Bro in which grade r u

[outer walrus]

Formula is the ion's chemical formula
Typical compound is an example of compound it forms after reacting with a cation or anion

[thorny gyro]

hey guys!
I love watching youtube animation videos about molecular biology. It could help me a lot, but couple days ago I found this video and it made me confused because in my notebook i have a different statement about how it is work
https://www.youtube.com/watch?v=NilAgJ67tBc
It's about Mechanism of Nuclear Transport.
How did you study? The importin protein and the NLS protein need a GDP to move into the nucleus or not?
In my opinion they don't need it, in the nucleus the complex will need a GTP only...
But the video only have 53 dislike and this make me confused..
Thanks for the help!
Have a wonderful day, Lili
(I hope my English is understandable)

[obtuse flax]

Can someone help me with write this reactions??

Task is to write reactions in molecular and ion form

Or you can tell me if the reactions can’t pop in

[vagrant pelican]

Thankyou!

[vagrant pelican]

Me? University

[sleek fossil]

Bruh really ? How old r u ? U really need to work on yr chem , this is high school question

[spare viper]

uh i missed class when we like explained smth

and i dont remember it

lets say i got 36km/h

do i multiply by 1000 to make it like 0.036m/s

?

[modest oracle]

Work accordingly to the units

You want to convert km/h into m/s

Therefore you need to multiply your km/h by (m/km * h/s) to get m/s

[spare viper]

i see

thanks

im not given a digit for h

the exsercise has Um= 36km/h

andi gotta convert it to m/s

[thorny gyro]

multiply by

5/18

its a shortcut

[modest oracle]

Well you know that an 1 hour has 3600s in it, therefore use 1h/3600s for the convertion

Same for m/km : there are 1000m in 1km

[spare viper]

ah ok

sorri im a little slow

ty

[thorny gyro]

its ok

[violet kiln]

Is there someone able to help me solving the second question of exercice 7 pleaseee ? ( only hints, don’t waste your time )

[cunning crescent]

I think you will have a higher chance of getting help if you translate the question into english 🙂

[violet kiln]

Ohhh yeah of course ! The magnetic field prevailing in space is given, in cylindrical coordinates (r, θ, z) of axis Oz by : …

1. Show that there exists in space an electric field which is of the form E = E (r, t) u θ and find E (r, t).
2. An electron moves in the previous electromagnetic field. Show that there is a circular path with axis Oz if B0> 2B1 and specify its radius.

[vagrant pelican]

Ik 😔, half of my gr12 was online, that was the first time being online, I barely kept up with lessons. I don’t remember anything I learnt then

and I have too much unnecessary things on my mind

[modest oracle]

What does M represent ?

[violet kiln]

It only represents a point caracterized by his cylindric coordinates
We can represent the problem as below in my opinion

[hallow palm]

I don't mean to be offensive but this is the sort of things we study in 9th or 8th grade (14-15 years old). seems odd in college/uni study material

[hallow palm]

that is understandable :( I also did my 11th grade online and it totally wrecked my basic concepts leading me to struggle so much in 12th

[vagrant pelican]

i don't remember anything from gr9

[vagrant pelican]

but also, maybe i'm stupid, i can hardly focus and i'm easily distracted.

[sleek fossil]

Come study with us brother we always on d server , 30 to 100questions everyday and u should b on level within 3 months 🙂
If u want pace , I can screen share , just make sure u change pages as fast as me , that should get d job done

[vagrant pelican]

3 months???

[sleek fossil]

U trying to reach college level right ? Gotta work my man . How much time do u have . Got exams ?

[vagrant pelican]

yea...in a few weeks

[sleek fossil]

Just do 100 per day , u will have drastic improvement

U can do it !!

[vagrant pelican]

ok ty!

[sleek fossil]

Lemme kno if u need screen share for pacing

[thorny gyro]

Is the trend linear between 2011 and 2014?

[livid tinsel]

Anyone good at inverse trigonometry???

[celest crater]

เรียนcom sci

[distant barn]

not linear

[worn magnet]

Anyone who can help me with this problem?

[modest oracle]

We can't tell if we don't have access to the scale of the vertical axis 🤓

[cunning crescent]

nr 3 is starting concentration of HCl - nr. of moles HCl used.

[covert smelt]

Can anyone tell me why the purple wave lags BEHIND the other one?

[cunning crescent]

the green starts at 0, which the purple wave reaches after the green. Time increases to the right, so while it looks like the purple wave is ahead of the green, it reaches the same spot as the green at a later time. Purple wave is further right, and further right = longer time.

[covert smelt]

Thanks a lot!

[cunning crescent]

unreacted = HCl that has not been protolyzed yet, and is still in its original HCl form

[round merlin]

Hey, does someone know how the Taylor Experiment works or (double slit experiment)? i have a presentation on it but don´t really understand how it works. Thanks in advance

[ripe trail]

can anyone explain the 2 step to me ?

[celest gorge]

it maybe helpful
https://www.khanacademy.org/science/physics/light-waves/interference-of-light-waves/v/youngs-double-split-part-1

[copper tendon]

this isn't necessesarily study help but more like i am learning about Kinematica (the stuff from Einstein and all that) so all the velocity and stuff, but when am i gonna use this bc this is hopeless i get physics 50min/week

so-

idk why i am learning this

they just say HERE FORMULAS

I AM NOT PLANKTON FROM SPONGEBOB I DO NOT WANT ALL THESE FORMULAS

or is this just somethign completely useless

[runic dragon]

A plate of a certain material, 1 [m] long by 1 [m] wide by 10 [cm] high, is completely submerged in the water and supported by the arm of a crane, as shown in the figure . If the plate was weighed before being submerged, registering 5,000 [N], and considering that the density of the water is 1,000 [kg / m ^ 3], what is the magnitude of the force F that the crane must exert on the iron to keep it suspended in the water?

Pls help

[hollow perch]

hi im a junior and this is a question with springs, Im not really sure how to solve it

[daring whale]

try it with the equation a=angular frequency^2 * max displacement

[tropic prawn]

What is the locus of a point at which the electric field due to an electric dipole is parallel
to the line joining the charges +q and -q forming the dipole?

[upbeat tide]

Is a scientific article that references other studies considered a good research study?

[cunning crescent]

can someone explain to me why the first 4 amino acids synthetized from this DNA sequence will be (f)Met-Ala-Ile-Ala? How do you find this?

[uncut sable]

hi can someone help me with the hypothesis. i dont really know how to write

[modest oracle]

What's that "answer above" ? We need full info for a proper reply

[uncut sable]

my answer to the first one is the kid will stop swinging first? and its telling me to state a hypothesis to why the kid will stop swinging first.

[modest oracle]

Oooh that kind of hypothesis

I was thinking of things like "We ignore air resistance, friction between the swing's rope and the branch it's attached to,..." instead

Why do you think the kid stops swinging first ?

[uncut sable]

is it because hes lighter?

[modest oracle]

I'd say the adult instead. The reason is that, as the adult is heavier, there is more tension in their swing's rope, and there is thus more friction between the rope and the branch it is attached to, resulting in a higher energy loss every swing

And the less total energy, the less kinetic energy, which means the less movement

I might be wrong, and would love to be corrected if that happens to be the case (then mention me pls ✌️)

[uncut sable]

ohhh i see

thanks for ur explanation and ur help

[modest oracle]

Np

I don't guarantee I'm right tho, that's my hypothesis for the phenomenon

[uncut sable]

its okay if youre wrong. cuz im not sure for my own answer too XD

[molten quest]

So i got a really neat pratical this semester for electrotech, but I cant choose which one would be more interesting/useful in the future - preferably in robotics, R&D (dont care about difficulty): 1) Work with a DC Motor 2) AC electric motor (asynchronous motor)
Guys got tips?

[thorny gyro]

"While writing different substituents or side-chains as prefix, we follow alphabetical order & while deciding alphabetical order di, tri are not considered" - Can someone briefly explain this?

[thorny gyro]

this is for organic chemistry

[cunning crescent]

it means that ethyl-x will still be named before dimethyl-x. So ethyl-dimethyl, not dimethyl-ethyl, because the di, tri aren't considered when ordering the substituents alphabetically

[glossy copper]

Can anyone help pls

[modest oracle]

Via the formula pV = nRT, we can calculate that the initial pressure in X is p = 3RT/V

When the valve opens, the total 5 mol of gas spread uniformly across the system with total volume 3V/2.
Since T is unchanged throughout the transformation, we consider it as a constant in the formula p(V_tot)=(n_tot)RT.
That means the overall pressure in your system is p = (n_tot)RT/V_tot = 5RT/(3V/2) = 10RT/3V

Since pressure is uniform across the system (it's an intensive value), that implies the pressure in X is the same

Now, final pressure in X - initial pressure in X
= 10RT/3 - 3RT/V = +RT/3V = +1/3 * RT/V

[glossy copper]

my god tysm

[flat oriole]

if i see which one gets to highest amplitude as a measure then purple gets later to the highest amplitude

[midnight sage]

Ohms law: V = I * R
Rearrange to: I = V / R
Substitute values: I = 16.7 / 167 = 0.1 Ampers = 100 mA

[wet willow]

ye, ty at the end i did find the answer but i had to sacrifice it for 2 questions cuz i ran out of time :((

[thorny gyro]

Oh cool! Thanks!

[dusk wagon]

Hey, I'm having this problem how many energy levels does the "cerne" aka core of the Calcium atom have?

[civic mauve]

Can someone tell me how this salt K2HPO4 would dissolve in a water solution

[vagrant pelican]

the units for spring constant k is N/m right?

how would I come up with a dimensional analysis for k and m, that is proportional to the angular frequency?

i really can't seem to figure it out

[flat oriole]

if I remember correctly the k2 implies there are two K+ ions after dissolving and a (HPO4)- ion for water to form weak attraction with OH- ion and H+ ions from the water. so the K+ will be surrounded by OH- ions and (HPO4)- ion will be surrounded by H+ ions.

[woeful talon]

can some1 pls solve q.13

[placid brook]

F = 15 N
m = 2 kg
g = 9.8 m/s2
s = 5 m Work done by the force in pulling the body,

W = F × s
W = 15 N × 5 m = 75 J

2. Force due to gravity on the body,

F = m × g
F = 2 × 9.8 = 19.6 N

3. Work done against the force due to gravity,

W = Fs cos thetha
W = 19.6 × 5 × cos 30°
W = 49 J

[placid brook]

last part is not clear

[woeful talon]

wouldnt the theta be 120?

[placid brook]

why is that?

you tell me

[placid brook]

if it even would be an obtuse it should be 150 i guess

which has the same value as cos 30 but with negative sign

[woeful talon]

from down there, (90+30), and if 30 why 30

neither 30's arms are the ones of it's force due to gravity

[placid brook]

Wait I guess you are kinda right

I wrote "cos" instead of "sin"

I am extremely Sorry

[pastel pumice]

anyone wants to do a long study session?

[thorny gyro]

Can someone please explain this? Ans: (B)

[errant solar]

can someone help with a d and g?

I know it should be in language help but nobody seem to be active there

[whole wedge]

Hmm maybe to make a civilized society, reading books is not an alternative/option and television must telecast educative programmes. I think this is what i would put but cant guarantee its right @errant solar

[royal loom]

can anybody help me w these questions? i already wrote some answers down but i still don’t rlly get it. the topic is moments

[thorny gyro]

any psychology student here?

[floral niche]

Can someone spot my mistake ??

Im lost...

From mm² to cm² :÷100 and from N to kN ÷1000 ? Or not ?

[ripe eagle]

are you sure you got it wrong? It seems right to me

[floral niche]

Yes it should be 2,4

[ripe eagle]

okay got it

i tried to do it

i'm gonna send you what i did, just a second

[ripe eagle]

so at the left you have your starting value of 24 N/ mm^2 and at the right you got the final result after conversion

1 mm^2 = 0,01 cm^2 and 1 kN = 1000 N

[floral niche]

I see you took the start value and used the two factors to get the result

[ripe eagle]

yes, I hope it's clear 😅

[floral niche]

Yes thanks alot

[ripe eagle]

no worries, good luck!

[karmic barn]

does anybody know any good sites to practice thermochemistry, stoicheometry and naming chemical formulas?

[vestal narwhal]

Do you wanna see something not very funny but made me laugh? Yes, yes you do.

[young fractal]

What would be the solution for question 23 and 27?

23 I think it's nucleophilic substitution but I had a doubt bw it and substitution addition..

[loud rivet]

is it D for 27? because of partial double bond char

[young fractal]

answers arent given

[static remnant]

Hi, anyone know why is my reliability test result negative? I've been looking for the answer but still don't understand. In my case, I use the Guttman scale and it only has 1 variable. Thank you in advance!

[loud aurora]

What's the name of this?

[ripe eagle]

did you try to do it?

[ripe eagle]

Found it! it's 1,3,5-Trichloro-2,4,6-trimethylbenzene

you can find more info here: https://pubchem.ncbi.nlm.nih.gov/compound/1_3_5-Trichloro-2_4_6-trimethylbenzene

[shut dragon]

This is a good site for questions like this (https://molview.org/) (i do hope this isn't considered advertising 😅 )

[ripe eagle]

what a cool website! I didn't know it existed, and its open source too omggg

is sharing links considered advertising?

[dense kite]

Yoo.. can someone help me with this ques.? Idk how to find the constants here..

I think i found the answer for the first part..but i need the values of constants alpha and beta to construct graph..

[loud aurora]

@ripe eagle thank you so much 💗

@shut dragon thank youuu it's useful 💗

[shut dragon]

No problem, glad to be of help/use ^_^

[modest oracle]

You'll have to sktech your graph without knowing what alpha and beta are

[worn magnet]

Can someone check if this makes sense?

[shut dragon]

At first glance it seems okay. though physics isnt my best subject :)

So i'de wait till someone else takes a look ;p

[proven haven]

ahh physics

[upper jasper]

Can someone tell if there is resonance or not in pyridine?

[ripe eagle]

@upper jasper I'm not an expert in chemistry but I think there is because you have a simple bond followed by a double bond followed by a simple bond (i might be wrong tho)

[upper jasper]

Yes you are correct, I checked with another friend and yes there is resonance

[shut dragon]

There should be one more, bieng put the duble bond on the right of N and do the patrn :?

[clever mason]

alguien sabe como sacarlo

[ripe eagle]

intentaste hacerlo?

[whole wedge]

Its not in english but since u speak spanish u probably can understand

Try with that

[clever mason]

si , primero saque el MR, luego hice regla de 3 simple 1mol_____58g 0,30m__________x= pero no me da lo que tendria que darme

[clever mason]

gracias

[whole wedge]

No problema no sé se ayuda pero se necesitas puedo tentar traducir algo

[ember lintel]

long shot but does anyone here work with/major in hydrogen fuel cell?

[south crown]

Can anyone help me understand this question?
“Can a simple pendulum oscillate in zero gravity?”

[cold basin]

probably not, bcuz of no gravitational force pulling it doing to complete a cycle
it can go all the way round tho

[analog elm]

Hi guys, does anyone know a website that can help me with Physics I? 🥺

[arctic sapphire]

hi! perhaps khan academy?

[unreal dirge]

Organic Chemistry Tutor on YouTube as well

[analog elm]

thanks for the responses, i was thinking more a website with theory/exercises rather then an online course.. 🙂

[arctic sapphire]

oh! hm, i don't really have much info on that

sorry 😅

[analog elm]

it's okay thanks anyways!!

[south crown]

If vector A.C=0 and vector B.C=0 then what will be the parallel of vector A?

1. vector B
   2)vector C
2. vector B X C
   4)vector B.C

[south crown]

Can anyone help me solve this problem?

[thorny gyro]

Can someone please help me name this and also provide an explanation for the same?

[wicked talon]

İt can be false but ı think 2,3,3-methyl-4-benzenemethane

[ripe eagle]

hi, did you try to name it?

[thorny gyro]

Yes I did but I'm actually struggling to find & number the longest chain

[ripe eagle]

@thorny gyro I'm not an expert in chemistry but I think the longest chain here would be the benzene

[ripe eagle]

@thorny gyro I think it's (1,1-Dimethylpropyl)benzene source: https://webbook.nist.gov/cgi/cbook.cgi?ID=2049-95-8 I could be wrong tho

@thorny gyro as vinnie suggested before, you can also use molview, I tried checking and it looks like we're good! source: https://molview.org/?cid=16295

[twilit dawn]

does anyone have any resources/techniques on how to memorize the cell, its components, mitosis phases etc? ty

[cedar whale]

anyone can help me with crystalline structures?

[thorny gyro]

thank you so much!!

[thorny gyro]

answer differs here but again thanks!

[shut dragon]

😊

[cold moat]

Physics help - Friction

Please can someone help me understand the question and how to solve it?

[modest oracle]

(I wrote drag instead of friction)

[old parrot]

For mitosis phases you can make flow charts and learn

[polar cliff]

What is snell's law in physics grade 10

??

[thorny gyro]

(sin i/sin r)=refractive index of medium2/refractive index of medium 1

[polar cliff]

Okaay leme try

[thorny gyro]

where i is the angle of incidence and r is the angle of refraction

yeeeess

[polar cliff]

Okk

Thank you :)

[thorny gyro]

welcome :))

[south crown]

Can anyone help me solve this problem?

[loud rivet]

to know which one are in the same phase think of it like this
if those points were to move a bit which of the two points will take almost the exact same path or which two particles will move in the same way as each other

[loud rivet]

now can u tell which of the two points start from a similar point and move exactly the same way?

[south crown]

P&U?

[loud rivet]

yes

[cursive ocean]

I need help with this lab if anyone can help me

[thorny gyro]

@thorny gyro

Ye

Can you explain it to me

Look, refractive index is just the change in direction of ray of light.

It is like a SI unit thing

It is used to express how much the direction has changed

What is sin I/ sin r = constant

I didn't understand that

It is the formula, which is used to find out refractive index

Look at this

Also remember that refractive index of air is minimum and refractive index of diamond is the highest

Also remember there can be two types of refractive index's

One can be with respect to medium 2

And other could be refractive index in vaccum

@thorny gyro

[thorny gyro]

Constant is the refractive index that will come out after u use the formula

U can use sin i/ sin r

Ok

But I dint think these kinds questions will come

The sin I / sin r

They will

Probably

[south crown]

“A certain amount of force applied by an object for an interval of time” is Impulse of force right??

[livid tinsel]

can someone pls tell me why in Cobalt the electron configuration is [Ar]3d^7 4s^2 .......why the [Ar] ??

[south crown]

[Ar] means the electron configuration of Ar which is similar to the configuration part of Co before 3d^7 4s^2

Co= [1s2 2s2 2p6 3s2 3p6] 3d7 4s2

[livid tinsel]

yeahh got it thanks!

[karmic barn]

Can someone help me with these two answers If 87 J of heat are added to a balloon, causing it to expand from 1.0 L to 1.4 L under 0.97 atm of pressure, what is the change in energy of the balloon (in joules)?*

cylinder with a moveable piston contains 0.044 moles (mol) of argon gas, which has a specific heat of 0.52 J/g⋅°C. The gas is heated from 25 °C to 275 °C, which causes the piston to expand the volume in the cylinder from 1.5 L to 3.0 L under 1.1 atm of pressure. What is the total change in energy of the gas (in joules)?

also this one if anybody can help me. Im learning but im absolutly stuck on these three questions

Consider the reaction: 2Al(s) + Fe_{2}O_{3}(s) → 2Fe(s) + Al_{2}O_{3}(s), ΔH_{rxn} = -851.5 kJ/mol. If 75 g of aluminum are reacted with excess iron(III) oxide, how much heat (in kilojoules) is produced?

[viral sorrel]

try to use the first principle of thermodynamics, dU=dQ-dW and knowing that dL=pdV

[viral sorrel]

same as before but you also know that dQ=nCdT where C is the specifc heat

just to be more specific: Q is heat, W is work and U is internal energy

[drifting birch]

can someone explain to me hoffman's bormamide degradation method to form amines's mechanism please

i am not able to understand it

i am very desperate

[worldly hawk]

sorry , i don't know that yet .

[south crown]

“ the screen is 1m away from the slits. When The double slit interference experiment of young is conducted, it creates fringe across the screen of 32mm And the distance between the two slits is at 0.20 mm. This creates bright stripes at both ends of the screen and the angular interval of the second bright stripe is 0.458. The total number of stripes created on the screen is observed.
Question: what is the wavelength? “

Can anyone help me solve this problem??

[willow lion]

Can someone help me with this? I've been stuck on it since yesterday

[jagged stratus]

if anyone is good with organic chemistry can they help with these two questions? i got them wrong in the past and with finals next week im trying to understand them~

[vagrant pelican]

hey guys, I'm having trouble understand the snell's law. Is sintheta = the speed in the medium? Knowing the angle of two mediums, how can you know which medium has a higher refraction index?

[tulip estuary]

Can someone check my assignment

for biology YR 12

[south crown]

What is the effective resistance between A & B??

The ans given in my book is 9

But the ans that I get after calculating is 2.
Can anyone help me solve this?

[worldly hawk]

2 is not corret ? İ found 2

[finite nimbus]

Hey!
Can someone please help me with those chemistery tasks)🙏

How many grams of salt (copper nitrate) is formed by the interaction of a solution containing 18 g of nitric acid with 8 g of copper oxide (||)

How many grams of salt is formed by the interaction of solutions containing 20 g of sodium hydroxide and 100 g of sulfuric acid?

[modest oracle]

Got 2 as well

[south crown]

I asked somewhere else on discord about this mathematical problem. And they said this…

[south crown]

I know man. I’m still a bit confused. Gotta ask my teacher tomorrow

[worldly hawk]

Oww i got it , yeah

[cunning crescent]

Find the chemical reaction, this will give you the relationship of reactants to products. Then convert the amount of reactants from grams to moles and find what is the limiting reactant - the amount of moles of that reactant will determine how many moles react in total. Multiply moles of limiting reactant with the relationship between that reactant and the product, and you will get how many moles product will be formed. Then convert that to grams

[modest oracle]

That's wrong

"So you can isolate it [the 6-ohm transversal resistor] by making a loop with the bottom and right resistors (which are in series) so it equals 6 ohms"

The right and bottom resistors aren't in series as the 6-ohm transversal one joins A to the wire between them

And the dude seems to just forget about the left, 3-ohm resistor

[spark solar]

Gotten 2 here

[hallow palm]

the answer given in the textbook must be a misprint

could someone help me solve this? I don't understand how to approach the question

the answer says it's (D) 3:1

[next cedar]

still need help?

[little salmon]

https://www.chegg.com/homework-help/questions-and-answers/n-ekseni-zerindeki-bir-noktada-dalga-boyu-1-m-olan-bir-gauss-n-geni-li-veya-n-yar-ap-ve-e--q89345462 maybe someone can help

[gritty tree]

Hey so, is anyone familiar with system theory or what
Systems, signals, logic gates.. 🤔

And like whatever these are

[livid tinsel]

I only know the first one lol it is 2,3 dimethyl pentane

[thorny gyro]

ik this is easy but i dont have time now to solve it

what is the speed of the body if it moves at a specific speed, the body travels 120m in 1 minute

[cunning crescent]

2 m/s

[sage lily]

Any good websites for biology i have mocks coming up ❤️

[midnight sage]

Im familiar with logic gates and signals to an extent but I havent coursed system theory (and I've never dealt with feedback networks at that level lol)

[hallow palm]

help with question 1 pls

[next cedar]

do u have a formula for this or something?

[hallow palm]

I know the drift velocity = current/(number of e × charge on e × cross section area of wire)
but I don't get how that would be applied in this?

[hallow palm]

thank you so much!!

[covert smelt]

happy to help 😄

[late vigil]

Ques 12, pls explain

[late vigil]

@hallow palm same module lol

Hogaya kya syllabus? For boards..I mean, kitna baaki hai 😂

[loud rivet]

i think this diagram should make it clear

[late vigil]

You're suggesting, the charge has divided in the sphere, so the ans will be A? As distance between the net charge is decreasing?

[hallow palm]

this example is almost the same as the question you're asking. only different thing is that the answer would be opposite since there are unlike charges, so attractive force will increase.

[hallow palm]

AC is completely left 😭🙏🏽 and magnetism ke formulas ka toh pucho hi mat

[outer lily]

i think 8 grams for the first

depends on the equation tho

[finite nimbus]

Yea, thank you, i already completed that task)

[late vigil]

Ayooo thank you so much!

[late vigil]

Formula toh kya hai aaj raat leke beth jana, 30mins max sab hojayega

AC ke questions karlena, theory mein kuch nahi rakha

Lets move the dms fot doubts? @hallow palm

[hallow palm]

yes we shouldn't text in the help chat lol

[loud rivet]

all the best dude 🥲

[loud rivet]

yeahh @hallow palm explained it p much

[hallow palm]

you too 🙏🏽

[loud rivet]

btw can such questions come in boards ?

if so then im doomed 👍

[hallow palm]

it's the first time I'm giving cbse so I don't know about the standards. but judging by the english and pe paper I guess they won't ask these types?

but better to be safe than sorry right 💀

[solar niche]

Can someone explain to me why the first graph is associated with the B molecule?

Please :(((

[modest oracle]

Hi. You might have forgotten that your paper is written in French. Most people won't understand it

[solar niche]

Sorry 😅

[solar niche]

associate the following elementary formulas with the different graphs :)

[cunning ocean]

hi does anyone wanna learn about the pathophysiology of acute and chronic liver failure?

[covert smelt]

The second and fourth options are correct according to le chatalier's principle

[hoary swift]

could someone help with this physics problem please? :/ "A jogger runs a 100 meters in 12.3 seconds. He accelerates for the first 25m and runs the rest at attained velocity. How long does the acceleration take?" i had to translate it so ask if it doesnt make sense

[agile spear]

can someone please help

[wanton oyster]

Anyone here that can help me with Data Statistics such as SPSS?

[granite condor]

looking for a year 11 igcse student to be my friend and explain stuff to me

[median veldt]

aye

i have a chemisty queastion

on rate of reactions

can peeps help out

A first order reaction has an initial reactant concentration of 0.688 mol/L. If the reaction has a rate constant of 0.040 s–1, how many seconds will it take for the concentration to drop to 0.540 mol/L? Give your answer to 3 significant figures.

[thorny gyro]

concetration [A] after some time t for first order reaction is: ln[A]=-kt+ln[A0] where [A0] is the initial concetration @median veldt

[violet basalt]

Need help, I cannot understand the concepttt

1. Is the potential energy more, less, or unchanged when the Center of Gravity of an object is raised?
2. What happens to the CG of a glass of water when filled with ice? Does it rises, lowers, or is it unchanged?

[dull gust]

Can u resend the question as it seems incomplete

[junior mulch]

does anyone has a ClutchPrep account? please dm me T___T

[vagrant pelican]

I guess for this you use W = -F(deltar), but why wouldn’t you take into account the angle? Is it because it’s for the work of gravity?

[thorny gyro]

gravity is a conservative force, meaning the path doesn't matter, only initial and final displacement, also, the reason it is -500 J is because the angle between gravity and work done is 180 ( W= F.S cos θ)

[modest oracle]

In multidimensional problems (here it's 2D), work is defined as the scalar product between the force vector and the displacement vector.

If you haven't learnt about vectors and scalar product yet, just keep in mind that only the displacement that is parallel to the force is taken into account

Here, the force is vertical, so only the vertical displacement matters (which is 5m, no matter how steep the slope is)

[thorny gyro]

Q) what does greater change in momentum means? can anyone help me with this

[thorny gyro]

I'm sorry but could you be more specific? I didn't get it

[cerulean elbow]

Any one can help me how to velocity of electron using Bohr's atomic model

[cerulean elbow]

@agile spear Is that a same string? or different string?

[modest oracle]

In what context ?

[cerulean elbow]

Finding velocity

of an electron

[modest oracle]

Yeah. But electrons don't always have the same velocity

That's not a constant

I get you want the electron's velocity, but where's the electron you're talking about ?

(What I mean is, that question is just as vague as "Calculate the force undergone by an electron." with no further info. It's impossible to solve without additional context on the problem)

[vagrant pelican]

can someone help me with this

[vagrant pelican]

thanks so much to @modest oracle and @thorny gyro for helping with my earlier question btw!

[cerulean elbow]

@modest oracle

[thorny gyro]

How do i find weight of given atoms for example how do i find the atomic and molecular weight of 96g of oxygen

Someone please help

ughh chemistry is so irritating

[thorny gyro]

agreed

[modest oracle]

Now that is something with info I can answer to

https://courses.lumenlearning.com/physics/chapter/30-3-bohrs-theory-of-the-hydrogen-atom/

This webpage contains what you're looking for

Especially these two formulas

[cerulean elbow]

ok,
Thanks @modest oracle

[modest oracle]

From these you'll get the electron velocity you were looking for

[cerulean elbow]

ok

[agile spear]

different

[cunning crescent]

periodic table. There should be plenty of online periodic tables with atomic weights. I only know norwegian ones tho

[thorny gyro]

anyone here doing a level bio?

[mild dome]

Can anyone help me out please? Um in organic chemistry how does mechanism help us like what is its purpose? Sorry I am dumb

[thorny gyro]

shows movement of electrons

from point a to b

[mild dome]

Oh Thankyou!

[ripe eagle]

hello, I need some help with score matrixes using the needleman and wunsch algorithm (bioinformatics): the unfilled matrix looks like this :

the rules are the following: gap opening penalty = -5, gap extension penalty = -1, terminal or initial gap penalty =0, substitution matrix = BLOSUM62

i tried to do it and i got this

i'm not sure if it's the right answer, and idk if i have to add +0 to go from the zeros at the very left to the squares right next to them (to the right)

[zenith rose]

Is anyone able to help me with these questions

[thorny gyro]

For which grade is this question?

[thorny gyro]

is this pre-univeristy?

[thorny gyro]

balance the equation

Mg+2F.then write solubility product equation [MG2+][F-]^2

[vestal charm]

We dissolve 2.42 g Fe (NO3) 3 in 500 mL water. Find [Fe3 +] and [NO3–].

Can someone help me with this?

[cunning crescent]

Write the chemical reaction, convert to moles, divide by 0.5 to find moles/L

[rancid badge]

Traduction:
A body of mass m = 2,0kg can be displaced along an inclined plane at an angle φ = 37 ° quickly constant, the coefficient of friction between the body and the surface is µ = 0, 2. The forces acting on the body are the normal, the weight, the friction force and 3 external forces that depend on the position, only the behavior of external forces 1 and 2 is known as shown in Figures 2 and 3, respectively.
Using the reference system in Figure 1, determine:

a) the work done by external forces 1 and 2, when the body of displacement from the point x = 2 m to
x = 7 m

[young fractal]

Hey can someone help me with q17

i can't figure out how to convert into chain structure, like is there a c at the end points and all that..

[balmy parrot]

The answer should be 2 chiral centres (option A)

[young fractal]

ye it is, can u explain how the structure works though for this question

[thorny gyro]

scam, dont click.

[copper wasp]

sorry everyone, I got hacked, in the process of fixing it

[thorny gyro]

you are dumb bro you need help lmao

[nimble pasture]

https://youtu.be/chsPHGOepns

here’s a vid that reviews drawing skeletal structures

it’s gonna be way easier and a lot faster to solve problems if you get used to skeletal structures tho

[vestal charm]

how do i solve this question: assume that a gas is enatomic and consists of 6.0 * 10 ^ 23 identical atoms. how big is the change in temperature? and it loses 90j heat energy
it is in a closed container that does not change shape tbh

[ripe eagle]

<@&717391911132069929>

[thorny gyro]

why are so many scam links posted on this server

[ripe eagle]

🤷

[modest oracle]

Because people fall for it. They get their passwords stolen, and get themselves hacked. Therefore their accounts are used to send other scam messages, so that even more people can fall for it

And the cycle repeats itself

Just don't click on these, you'd get yourself hacked and banned from most servers for spamming scam links that you didn't even send

[ripe eagle]

wow, didn't know hacked accs were used to send more scam... thanks, I'll be careful!

[modest oracle]

Now you know

At least that's how some of these scams work

I remember having one of the people I'd helped in #math-help send one of those scam links to me, then apologising 30min later, once the actual owner had understood what was happening and tried to delete all the messages

(There were too many of them and he'd been banned from almost all of his servers, so he just shut down his account and made a new one)

[ripe eagle]

omg he got hacked?

[modest oracle]

Well, he'd clicked on the link

[ripe eagle]

i mean scammed

yeah

poor thing 😥

[modest oracle]

Well scammed is hacked in most cases

[ripe eagle]

yeah, I meant he clicked on the link

[modest oracle]

That's why you shouldn't

[ripe eagle]

agreed, everyone be careful!

[young fractal]

Thanks alot :))

[cold arch]

If the message above contains a link to free nitro, it is most likely a phishing link. Please DON'T click on it to protect your privacy. You can notify the peeps by tagging them ( @peeps ) and they will take care of it as soon as they can.

[potent horizon]

would someone be able to help me with this?

[loud rivet]

ok

[next yacht]

hello I need someone who knows how to hack a wifi please for my research project

pleasze

[sleek fossil]

Ayyye , now that’s a useful question @next yacht lemme kno if u find out

[thorny gyro]

This is science what

[fringe scarab]

Hey can you help me with this?

Two particles are separated at a horizontal distance. They are projected at the same time. Paricle 1 moves towards particle 2 with velocity v1.Particle 2 moves towards particle 1 with velocity v2 at angle 60. What is the minimum distance between them that need for them to colide and the time after with it will happen?

[modest oracle]

Do the particules undergo gravity ? Because otherwise they will never touch (unless they start at the same position, which is physically wrong)

[fringe scarab]

Yeah, no gravity included

[cunning crescent]

Can anyone explain how they got from the 2nd to the 3rd line? Where did the 3rd expression come from? (Commutators, physical/quantum chemistry)

[modest oracle]

Then how could they ever touch if Particule 2 gets out of Particule 1's trajectory as soon as they are projected ? (assuming they're points, not spheres, since you didn't specify any shape/radius data)

[thorny gyro]

does anyone have a good guide/source for learnign lagrangian or hamiltonian mechanics? I only came to know of them some days back and they are said to be more usefull than newtonian mechanics

[night mortar]

how do i solve the first part? im confused

then answer key says 19.6N

but when velocity is constant then acceleration should be 0 right?

if im not wrong?

nvm found it