science-help

[magic delta]

its a scam

can you explain it a bit pls 😅

[wicked notch]

well

the particle position function is x = v0t + (at^2)/2

v0 is the initial velocity

a is acceleration

[magic delta]

what do we know?

[wicked notch]

you can see in the function 5.7t^2

then 5.7 is a/2

[magic delta]

yes

so we differentiate it?

[shell drum]

@lyric patrol let me know if you have any doubts regarding the solution

[shell drum]

@magic delta is it clear ?

[magic delta]

yes it is thank you!

[shell drum]

[woeful jackal]

Science is fascinating

Very beautiful

[pale girder]

hi,
i was doing bonding in chem, I had a doubt from MOT
it says pi bond symmetry is not going to work as orbitals are of diff axis that is px and py and the lobe signs wud be diff above and below molecular axis
but on yt a teacher explained diff

she said same but took px and px orbitals

my ques is can u do pie bonding with orbitals of same axis? and how is it still messed up then?

[loud rivet]

its generally called a converging lens because it tends to converge an incoming beam of light but it can also act as a diverging lens!! if the medium around the lens is denser than the lens itself

[stable sand]

what if rays ain't parallel, is it still converging?

[shell drum]

Yes. but not at the focus. They converge at a point on the focal plane such that the angle between the reflected ray and principle axis is the same as the angle between the incident ray and principle axis.

[stable sand]

there's a case when they don't converge but we draw lines in ray diagram so they appear to meet

[shell drum]

the tangent of the angle made by the incident ray with the principal axis will be equal to the ratio between height if point of convergence from principal axis and focal length of the lens

[shell drum]

Yes , my definition wasn't perfect as I learnt this a decade ago or something. Focus is defined as the point where the rays converge or appear to converge

[young raven]

got the right answer cos it was multiple choice but dont know how to get there

[severe marten]

distance = speed * time

[lyric patrol]

Thank you for this. Really appreciate your help😁

[sour nymph]

hi guys! it has been days but I cant still think of a problem and title for my research T^T it should be pharmacy related. Can you guys suggest anything? 🥺

[upbeat gulch]

I REALLY NEED HELP: A Photon has a frequency of 7.5 x 1014 Hz. If the energy of the photon triples, what is the new frequency? a. 2.3 x 1015 b. 2.5 x 1014 c. cannot be determined

[shell drum]

No worries

[shell drum]

With 1014 do you mean 10^14 ?

[upbeat gulch]

yes

same goes with 1015

[shell drum]

Answer is a.

Energy of a photon is given by E= hf where h is Planck's Constant

When energy is tripled , frequency should also triple because Planck's Constant is a constant and it cannot vary

New frequency = 7.5x 10^14 x3 = 22.5 x 10^14

Adjusting decimals
This gives 2.25 x 10^15

Rounded off to 2.3 x 10^15

[upbeat gulch]

well explained!

thank you

[shell drum]

You're welcome

[thorny gyro]

In an 8000 strand coil a 15 kV emf is induced. Determine at what rate the magnetic flux changed.
I'm not sure if I'm thinking correctly here:
N=8000
E=15kV=15000V
E=-N(ΔΦB/Δt)
(ΔΦB/Δt)=x
15000V=-8000(x)
-8000x=15000V|: (-8000)
x=-1,875 Wb/s

[tame kraken]

YEP YEP right it is

[thorny gyro]

ty

[digital thicket]

Anyone got chegg?

https://www.chegg.com/homework-help/liquefied-natural-gas-lng-transported-large-tankers-stored-l-chapter-8-problem-19p-solution-9780073104454-exc

Needed help with this

[urban socket]

Can anyone help explain what “by such means we could send signals at infinite speed.” means?

[low gyro]

that means if we use gravitational effect to send signals ,we can send at infinite speed

[cloud igloo]

can someone explain this

[tame kraken]

Option 3, keto-enol. In option 3 you dont have enough of hydrogens to put on 3 "OH" groups. Just search for Tautomerism you will get your thing

[cloud igloo]

Thanks

[true anvil]

Can someone help me on circled red ones 😭

I will love u forever and plz mention me If u respond

[modern terrace]

Any know how to format this problem? I want to plug in the givens into two separate equations based off the formula below but I keep doubting myself

[tame kraken]

See First you assume that the 25 gram is "C". and you apply the formula to raise the temp. by 1k. But you dont get the above mentioned heat. And then you try to do the same assuming D is the entire 25 gram. But again you dont get the right answer. Now, you can conclude that it must be a mixture of C and D. And now you assume C as '25-x' grams and D as (x) grams and you put on the formula and thats it. You get the value of x.

[lean kraken]

Hello does anyone know how to name this cyclic alkene

[tame kraken]

1-tert butyl, 4-methyl cyclohex-1-ene

[lean kraken]

can u explain why is that dude

[formal bloom]

Idk how to do dot or cross product, mayday

[golden creek]

is outer radius + inner radius = total radius?

[modest oracle]

Decompose the vectors into the sum of their components and, using the distribution method, sum the smallers products between each component one by one

Example :

Using x, y and z as the normal base vectors of R3 (the 3D space)

A = (a,b,c) = ax + by + cz
B = (d,ef) = dx + ey + fz

You get :

[modest oracle]

That's a long way of doing it, but it works all the time

The short way is : Sum the product of every component with its equivalent (the x-component of A with the x-component of B, ...)

You'll also get ad + be + cf

You can follow the same method with the cross product, and multiply each vector component of A with those of B one by one

The thing is, you'll get x, y and z in your answer. Reverse the very first step to get a complete vector

[muted lynx]

damn i learnt these 5 months before... i knew all these things but now i forgot haha... since i passed and didnt touched my books after that

[formal bloom]

Thx 👍

[acoustic bobcat]

To all my indian peeps who have thier neet exam tommorow including me, wish you all the best and lots of love

[errant solar]

is the 15 ohm in parallel or series?

[errant solar]

anyone?

[thorny gyro]

15+5
series

[weary quest]

Hello I wanted to ask

Is high and low potential energy types of potential energy?

[buoyant quail]

Hey guys! I'm really struggling with this problem. Have tried parallelogram laws to resolve it but have no idea how to come to the answers.
The answers are: F = 55,8225 N, Theta = 22.51°

[topaz canyon]

15 is parallel with 5, both terminal are touching the 2 terminal of the other

[topaz canyon]

nop

[unborn oracle]

Hi can someone help me with Q3ai?

[wraith moss]

The alkly group attached is treated as substitute(as the cyclic structure has more c-c bond) And numbering is done such that double bond is the lowest number

[wraith moss]

1 mole of methane will combust completely to give -728 kj/mol
So 2 moles will be ... 2x -728 KJ

[unborn oracle]

Ah alright thank you!!

[noble locust]

ay i need some help with some science work asap if someone can dm and call id appreciate'

[severe marten]

r u sure those r the answers bc when i put those numbers in the calculator i get 94.5

pause i think i got it

bruh i got 69.02 for theta and 144.0572 for F

[true anvil]

https://gyazo.com/ffe5cad19b7e31e0439eba6dfd25ae47

no idea what to do

is it not none of them

?

[true anvil]

ok update.. it was carbon 3 and carbon 5 but why

[rancid swan]

how to position the elements in lewis dot structure

for me I'm currently learning it up to 3 elements

[timid raptor]

can green gas be accepted in a)ii)?

[buoyant quail]

These are the answers from the teacher, but I don't know how he resolved it. Anyway, thank you for the reply!

[cunning crescent]

Can you give an example of what you're wondering about? I'm not sure I understand your question

[hazy garnet]

Hey guys

Can someone help with my physics question

[willow lion]

my minds been blank this whole hour trying to figure out this question

Do I need to use 2 equations?

or just one

[shell drum]

Do you still need hellp with this?

[willow lion]

Only for part b

[shell drum]

I'll do it in a moment. in class rn

[shell drum]

do you have the answer to check with ?

on rough calculation, I got around 75m

[willow lion]

There is no answer, if I answer the 5 times it just locks and doesn't tell me thee answer

[shell drum]

oh, okay

i'll write down the method I used and share

[willow lion]

thanks, you can take your time btw its not due tmr or anything like that

[shell drum]

oh, I'm done

I've tried to explain things as simple as I could. If you need further explanations, let me know @willow lion

[willow lion]

Ohhh ok

that makes sense now

there were way more steps than I expected though. Thanks for the explanations they're amazing

[shell drum]

after you hit 88 kmph, your car would move further away. so, you need to find thetime when it hits that speed and work things out

[shell drum]

The hard part is converting the word problem into numbers. once you do that, it's pretty easy

Also, once you learn that, you can do it in a page . I made sure i explained everything as I didn't want you getting lost halfway through

no problem. Keep trying to solve problems like these and you'll be alright

[willow lion]

👍

[mild sedge]

Can anyone explain redox reactions?

Or send me a link to useful info about it

[cunning crescent]

What do you need help with? Redox reactions are, at its core, a reaction where electrons are exchanged, usually from a nucleophile to an electrophile/from compound with low electronegativity to one with higher elextronegativity

[mild sedge]

Thank you. Someone already answered my question so I understand everything now.

[cunning crescent]

<@&717391911132069929>

In every chat

[hoary stirrup]

How do I identify the moon phases quickly? Some phases look like other ones.

[hidden sapphire]

Guys I need help

Does anyone have any articles focused on medicine and the use of Buffer?

[unique shell]

hello

is anyone good at physics? ;w;

[formal bloom]

I'm not, but I'm studying physics 1 right now so I can help but to an extent.

Also, I'm gonna sleep rn. I'll try to answer your question tommorow

[unique shell]

okay no worries!

[modest oracle]

Ask your question here

Someone will answer

[weary quest]

Hello

I just wanted to know why 100cm m^-1 is unlimited sigfig???

Please someone let me know why please n ty

[thorny gyro]

You mean 100cm/1m ?

[raw socket]

dont laugh pls i dont know the answer to this..

[thorny gyro]

option b

[raw socket]

can u explain why :')

[thorny gyro]

the equation is right there 😶

[abstract crown]

it's A. the ratio of HCl : NH3 : NH4Cl is 1 : 1 : 1. if you change that ratio of the HCl : NH3 to 1 : 2, the product would produce 1 mole of NH4Cl (as shown in the original equation) and an excess mole of NH3.

in other words, 1 mole of HCl + 1 mole of NH3 produces 1 mole of NH4Cl. hope this helped.

[late gate]

option a

[late gate]

well said

[raw socket]

I thought A too but my understanding wasn't solid, this completely clears it up thank youuuu !

[late gate]

it says sealed container so the excess NH3 will remain inside

[potent shard]

guys did galileo or newton invent gravitational acceleration

galileo had the pisa atowwer experiment

and he figured out similar acceleration between objects with # masses

does that mean he discovered gravitational acceleration

[late gate]

the postulates of galileo indicated a constant which resembled g but he didnt mention it

[formal bloom]

I learned in school that any number that comes after a non-zero number is a sigfig, but there are other rules that I'm forgetting. Hope this helps

[late gate]

newtons equation whereas indicated about acceleration directly

[potent shard]

hmm alright thanks

[formal bloom]

I'm back, what's your question?

[unique shell]

Hi! I'm going to school rn, is it fine I'll let u know when I come back?

[formal bloom]

Sure

[cunning crescent]

0 doesn't add to accuracy, because 1000000 is as accurate as 1*10^6, which has just 1 significant nr. I think that might be it?

[stable sand]

how do i know the state of compounds in a reaction

Like hydroxides and oxides

is there ant procedure or chart

[late gate]

you cant tell actually

depends on the conditions and melting and boiling point of compounds

also pressure as it tampers melting and boiling

you can have a guess sometimes but very hard to tell in general

and some reactions environment can contain multiple state of same compound

[late gate]

for hydroxides are generally in a solution for reaction so they are aqeous

[stable sand]

n oxides are generally gaseous?

[late gate]

nope they are also found in solid state

like CaO powder is used for production of CaCO3

so it depends

[stable sand]

co2 is gas

isn' there more dioxide gases

i can't recall

[late gate]

i didnt say oxides cant be found as gas

[late gate]

ofcourse

there is SO2

[stable sand]

is cao the only solid oxide or are there more

[jolly palm]

Metal oxides are usually solid at room temp

[late gate]

no there are many more

[dusky vigil]

What’s the number of atom moles in 4 moles of NH4Cl molecules

I’m so dumb it’s 24

[sour nymph]

hii guys. do you know any isolation process or the whole process on how to get Quercetin from papaya leaves?

[potent shard]

what

[modest oracle]

⚠️ A mole is not a molecule

A molecule of NH4Cl contains 6 atoms

A mole is a set of 6,022*10²³ molecules (by definition, no matter what kind of molecules)

Therefore, 4 moles of NH4Cl contains 4•6,022•10²³ molecules of NH4Cl

As each molecules has 6 atoms, that means there are a total of :
6•4•6,022•10²³

[pale girder]

Hi

Couldy anyone explain how to find error here

[hardy stratus]

Which of these amino acids would probably end up on the inside of a protein when it folds into its 3D shape?

[dusky vigil]

You don’t need to do the 6,023x10^23 since they asked of how many moles of atoms, the answer is 24 😼

[modest oracle]

Oh yeah I misread the question mb

[dusky vigil]

I made the same mistake lmao

[pale girder]

could anyone tell dimensional formula of this in steps?

[low gyro]

for a point mass moment of inertia is defined as mass times square of perpendicular distance from axis of rotation. coming to its dimensional formula from definition we can say that [M][L^2] .Radius of gyration is that radius a point object of same mass as the one for which radius of gyration is being calculated should be kept so that the moment of inertia remains same

@pale girder

[pale girder]

yeah i am reading im sorry , im a bit slow in understanding

sorry i delted

[pale girder]

ok i got it now thanks a lot u explain very well and in simple words.

[thorny gyro]

WHAT IS GERM PORE?

Is anyone a bio major

that still remembers basic bio stuff

like general bio

[wide solstice]

Germ Pores are the apertures on pollen grains where the protective layer sporopollelin is absent.It has Callose.

[thorny gyro]

So pollentube comes out from germ pore?

[wide solstice]

Yess

[fringe compass]

Yes ig

[thorny gyro]

In an mcq que was that
From where did pollen tube comes out and answer was intine only...👀

[wide solstice]

Intine and exine are the parts of pollen grain,,,in order to come out it has to come across germ pores

[fringe compass]

Wait i am sharing a pic

[thorny gyro]

Okiee thnx for explaining

[thorny gyro]

Thnkyou

[fringe compass]

Sorry can't help much my bio not in english〒_〒

[thorny gyro]

I'll not do good in NEET exam 😭

[thorny gyro]

U helped a lot thnkyou

[pale girder]

could someone explain this with an example?

and this also

[deep musk]

Any nice resources for pharmacology for medicine students?

[formal bloom]

If an object has a constant acceleration of 1m/s^2 for 7 seconds, then at each second, the instantaneous acceleration is equal to the average acceleration. I typed this during class so if u want, I can explain it better

[pale girder]

ok

[formal bloom]

The best way to understand these equations is to put units on them so when you say a, think meters per second squared, when you see v, think meters per second, and when you see S, think meters. If you do it correctly, the units on one side should match the other. If this still doesn't make sense, I'll try to add in some numbers if u want.

[dull lodge]

Hey Folks, this is a link to a research survey. If you have a couple of minutes, filling it out would help me a lot. There are no right or wrong answers, just fill in whatever you think is true.

https://forms.gle/J6KtNB9ryMt2Rzhm7

[potent shard]

Im going to do it

ok maybe not

[modest oracle]

?

[potent shard]

i dont understand the words

[hasty sinew]

does anyone know the difference between sporangia and sporocytes? I'm kinda confused

[thorny gyro]

all i know about this topic is sporocyte is a cell that produces haploid spores during meiosis

[analog burrow]

Hello, I need someone who is good at chemistry. I'm grade 11. It would be very, very good if you could speak German.

send me DM

[proven shuttle]

Hello can u help me with this please

[boreal spear]

guys i need help

i cant do this work sheet and the teacher says if i dont do it i will be expelled from school

[modest oracle]

What work sheet ?

[thorny gyro]

Whats the difference between vesicles and vacuoles in cell?

[modest oracle]

Hey I can't help you if you give me nothing to work with in the first place

[tulip jetty]

Can anyone help me with this sum

A car was travelling at a constant speed for 30minutes. just then it met with an accident and is sped became three-fourth its original because of the decrease speed the journey after the accident took 60 more minutes than it would have taken if there was no accident. Find the total time take by the car in this journey

[shell drum]

let me know if you have any doubts

[thorny gyro]

wut is meaning of biestrous????

[woeful talon]

My eyes have lenses, so when we see an object very closely it appears blur because it lies between focus and opt. centre. Then why does not the image appear inverted to us? (Since image formed of the obj between f and O is virtual and erect)

[thorny gyro]

the image created IS INVERTED at our retina
but the optic nerve is built as such that we see the correct image

[shell drum]

\the normal images which are inverted , appear to us erect,//
no it doesn't appear erect to us. if its an erect (I'm assuming that's what you meant by normal) object, the image formed in retina is inverted which is further processed by the brain, inverted again and thus we see the image in it's original state.

[shell drum]

Because the lens in our eye doesnt have a fixed focal length. it will adapt to make sure we get to see an erect image.

there are a bunch of muscles attached to the lens called ciliary muscles which helps in changing the focal length of the lens in our eyes

do some research about ciliary muscles and you might stumble upon something that might answer all your doubts @woeful talon

[blazing hound]

Can someone explain these steps to me? Its inertia of a sphere

[still olive]

.

[willow lion]

I need some help with physics

been stuck on this question

And not sure why this one is wrong, I tried 50 too

[willow lion]

these 2 as well

sorry if there is a lot

[tacit wraith]

how do you find the potential difference across Ac

[shell drum]

still need help ?

[shell drum]

i got this as 64.78 km

and the angle 40.9 . I see it is 36.9 so, I'm not really sure

[elfin tide]

Hd stands for?

[stoic bramble]

Heated?

[elfin tide]

Triangle thing stands for heat ig

[stoic bramble]

Indeed

[willow lion]

Thank you so much! Its definitely much easier when you structure it like that to understand, the explanations help clear any misunderstandings I had too. I was doing these for 5 hours and you made them look so easy xD. I guess the real difficult part is turning words into numbers & values

[shell drum]

If you try to illustrate the question , it'll make much more sense and you'll be able to picture it in your head thus making it easier

[willow lion]

I got so confused in the woodpecker question since they didn't give me time?

also for the vector length I was doing pythagorem but it I knew it wasn't working since its not a right angle triangle

so Im not sure how you got the length of 64.78km

for angle I just used this equation

[shell drum]

Which equation did you use ?

[willow lion]

This one for angle

I put the values in and it gave me that

[shell drum]

I had used parallelogram law , and I got the answer around 64ish

Wait, let me get my ipad. I think I still have it there somewhere

@willow lion have you learnt parallelogram law of vector addition?

[willow lion]

I don't think so

[shell drum]

Uhhh

[willow lion]

This is what I learned

[shell drum]

Oh, vector resolution

[willow lion]

Ohhh

I did that equation but with 40 and 30 instead no wonder I got it wrong

[shell drum]

This is how you solve using parallelogram law

[shell drum]

Would look confusing since you don’t know that. I just posted it since i had solved it before

[willow lion]

I see Im sure I will learn it eventually

since we just started learning about kinematics and vectors

[shell drum]

I'm sure you'll. Good luck

[willow lion]

Thank you for helping me. Really.

[shell drum]

No problem

[willow lion]

I was so unbelievably stuck and frustrated

[shell drum]

I saw the questions late , or I'd have sent answers earlier

[willow lion]

Its no worries, we all have our own things to do so I am already grateful you took the time to help

[cedar swan]

How do I calculate the acceleration of gravity from the surface of a planet?

[cedar swan]

nvm i cba

[shell drum]

experimentally ?

[past sigil]

is this isotonic or hypotonic?

[violet saffron]

does here anyone want to see or study for the chapter "general organic chemistry"

i have my hand written notes

[pale girder]

guys

i have a doubt

here in this question , why did they say 16g of ch4 as 1 mole?

[abstract crown]

because based on the given chemical equation, you need at least 1 mole of CH4 to produce the predicted products in the equation.

[pale girder]

cuz like they said in ques 16 g of methane makes a combustion

right?

and that wud be 1 mole

if they said it just ch4 then we wud assume avogadro no as 1 mole right?

[abstract crown]

yup. also, if you solve for the molecular mass of CH4, it corresponds to 16.05 g/mol, if that helps you understand it better.

[pale girder]

ohhhhh ok

yeah

12+4

ok

ty

:3

[vast pewter]

can someone plz tell me which one is progesterone and which one is for oestrogen plzzzzz
tmrw is my test and i am pretty sure this might help in the exam

[thorny gyro]

CAn someone help me too

[vast pewter]

i asked someone the answers

and even google said it was oestrogen

[stable sand]

yes yes my bad

they're confusing

If sodium reacts with oxygen at room temperature to form Na2O why does it react vigorously with dilute HCl to form salt and hydrogen I mean shouldn't it react first slowly like aluminium due to Oxide layer and then vigorously due to the high reactivity of its pure metal element (sodium metal)

[flint iron]

i don't understand about Shape of covalent molecules

[thorny gyro]

6*10^-8 seconds?

[thorny gyro]

How do we do it?

[thorny gyro]

is it right?

[thorny gyro]

We are not provided with answers

oh

then 1st find electric field

then you get force

then it's simple projectile motion

ok ill try

[thorny gyro]

you will get it!

[civic bone]

i dont understand how this represents the calvin cycle :'D could someone label this by any chance?

actually nvm i think i get it

[cunning crescent]

Hi does anyone know of any good resources to understand commutators? (in physical chemistry/algebra) I'm struggling with the math part of phys chem🥲

[woeful talon]

are the red and bluish colours due to scattering or it is due to dispersion at my eyes(eye's lens)?

[thorny gyro]

scattering

[thorny gyro]

no change in vision at the level of the eye lens

[wicked brook]

Can someone explain this ?

[modest oracle]

There are several way of getting 0 as a result

One very visual one is that :

• All three charges are the same value
• They are placed in such a way that they form a perfect equilateral triangle around the charge Q

Now, take the each force vector F1, F2 and F3. If you sum them and draw what their sum looks like, you'll realise that they also "form" an equilateral since they are of same length (because the charges are of same value, and so are the forces). Thus the tip of F3 loops back to the tail of F1, which means the total sum of forces (= net force) is zero

Again, that's a very graphic way of interpreting this problem, and it only works because of the symmetry.

The best way to prove that sum(F) = 0 is by giving each force vector proper component values. Draw a 2D coordinate system, and try getting the components for each force vector (as shown in the solution). Then, sum them all, and normally the x- and y-components of all three forces should cancel each other out

[unborn lava]

Can anyone explain the steps to solving this? “A championship golfer uses a nine iron to chip a shot right into the cup. If the golf ball is launched at a velocity of 20 m/s at an angle of 45° above the horizontal, how far away was the golfer from the hole when he hit the ball? What maximum height did the ball reach?”

[shell drum]

There you go @unborn lava

[fading leaf]

can anyone eplain the structure of flagella

[willow lion]

@shell drum How did you improve your physics understanding and how to convert word questions to numbers and understand what to do?

[shell drum]

Practice I guess. I learnt these topics ages ago. and have dealt with even tougher topics in my engineering degree. The best thing, in my opinion, is to familiarise yourself with questions, and also, try drawing figures so that you can have a better ubderstanding of things

[flat merlin]

The answer says that they are the same type of force

But one is normal force and one is gravitational force?

Can someone explain

[modest oracle]

Engineering rocks

[wraith ivy]

I don't really understand the Terminal speed part

[formal bloom]

It might just have to do with breaking the helicopter's fall into its x and y components. As long as nothing happens in the y-direction as the helicopter falls, then it could reach a terminal speed since terminal speed is only in the y-direction

[weary quest]

Hello

Can you please let me know how to do pressure unit conversion?

Please n thank you!

[long juniper]

anyone know how to find the mass of cart A? (given that the standard cart is = 1kg, and also that this is a collision with friction, so momentum isn't conserved)

[formal bloom]

I gave it a try, and it failed. Does someone know why?

[distant flame]

Why school buses are painted in yellow?

[patent peak]

so that they can be visible from far distances for safety purposes............

[thorny gyro]

can anyone help me with this

[twilit fiber]

hi! not sure if this is thee right place but: are carrots sweeter or less sweet when stored out of the fridge?

[modest oracle]

#welcome-verification rule 5
Also the answer was C (n = mass/atomic mass. Number of atoms = n * avogadro number)

[modest oracle]

That's what I got for question 1

[formal bloom]

Thx

[oak summit]

Anyone can explain the law of Motion???

[winter mist]

Does anyone have any active recall tips for o-chem? I just failed my first exam and I don’t want to fail again 🤧

[oak summit]

Same bro.I just failed my first English exam and I don’t want to fail again

[spare snow]

if latitude = 14.648, is it 14°648'?

[native thunder]

Free science lessons on yt will help u out, or even khan academy both are perfect for sciences.

[midnight field]

in this experiments interpretation it said the positive charges form the glass rod charged the metal rod? how is this possible isnt glass a insulator so it should restrict the flow of electrons

[deft cove]

Hi, I'm a physics student from Perú. Does anyone has information or a book were can I find about anomalous dispersion?

[deft cove]

glass is a dielectric material. But it may be charged. Dielectrical property means that the material couldn conduct a current of electricity, but it still be able to stock charges

[deft cove]

Also, charges inside a dielectrically material can be influenced to spread over the material's body in two poles.

[deft cove]

please, I need help in this :c

[worn heath]

Hi guys, can someone please help me with this question? Thank u!!

[severe marten]

from one sabis student to another, youre just better off memorising the answer in the hw exam

because if theres one thing that sabis is good at, it's not making sense

though out of curiosity, do you go to a sabis school in europe ? bc this is the first time i encounter someone from a european sabis school

[midnight field]

damn another sabis student those are rare , i go to a sabis school in asia

[midnight field]

ooof like i asked my physics teacher that question man literally ignored me. Ig its good to know that all sabis schools are equally dumb

[severe marten]

yea no i went to a sabis school in the uae

it was. interesting to say the least

[echo fog]

fun fact hw exams are exclusive to the gulf

[severe marten]

shit really ?

i feel cheated

[echo fog]

Yeah ahaha, i moved from one of the schools in the gulf, to one that follows Cairo's ciriculum so i found that out

[echo fog]

Only had one of year of those and was losing my sanity from them, glad i got out of there :)

[blazing hound]

Can someone explain these steps to me? Its inertia of a sphere

[thorny gyro]

What is the pressure of the atmosphere at the surface of Earth (sea level)?

[deft cove]

1 atm. But there are another unities for it. For example, 1 atm is equal to 101325 Pa (Pascal's), usually rounded to 10^5 or 100 kPa.

[deft cove]

Another example is 1 atm=760 mmHg (millimeters of Mercury) or 760 torr

[deft cove]

When you have triple integrals, if talking about volume, they can swap their places. That's why in the example they first do the integral around r, next around theta and last, around phi

[icy bronze]

Anyone know how to answer

Our teacher gave this as an exercise despite the fact that we haven't learn it yet

[sonic bay]

shouldnt it be red then?

[stark viper]

How can i answer no.b)

[modest oracle]

The left concrete block shifts the center of gravity to the left to counter the mass of the right arm and what it carries

The base concrete blocks lower the center of gravity to make the crane more stable, in case it is slightly inclined

Plus, the base blocks shift the total/average center of gravity even more towards the center of the crane, for even more stability

[blazing hound]

But how is r^2 = r^2sin^2phi

[stable sand]

can i finish electromagnetism in less than 10 days?
like if i can only give 2 hours every day

[modest oracle]

That's 20h of work, that's more than enough if you use your time wisely and don't get distracted

@stable sand

[ripe trail]

does anyone know the answer ?😩

[deft cove]

If I am not mistaken... because the change of coordinate system. I guess they give you the radius on your problem's data as simply r. But because of changing it to cilindrical coordinates, it changes to r, theta and phi

[deft cove]

if you can post a pic of the entire problem, it would be good

[modest oracle]

spherical coordinates*

[drifting sequoia]

i guessed on this, i don't know why this is correct can someone help?

[cunning crescent]

This is correct because Neon, in neutral state, has 8 electrons. F in neutral state has 7, but since its F- it has one extra electron adding up to 8. Nå and Mg have 9 and 10 respectively, but since they have a positive charge they lose an electron per positive charge. Meaning all ions have 8 electrons, same as Neon

[pale grail]

guys what does this mean?

pH of 2.0

[fresh jungle]

Could someone help with physics?

The question asked: can you find the velocity before the braking period without calculating acceleration, and it gave you the distance in which it took to break and the time. It also stated that it decelerated constantly. So I thought you could find the average velocity during the deceleration period and double it to find the velocity before the brake was hit since the average would be between 0 and vi so then you can multiply by 2.

Would this work

[cunning crescent]

Are you asking what pH is? pH is a logarithmic scale of acidity, in most cases going from 1-14, and is a measure of how many H+ ions are in a solution. The more H+ the more acidic. The formula for pH is -log[H+]. pH 7 is neutral, pH 14 is basic and pH 2 is acidic.

[visual dirge]

embryonic research brings about increased possibilities for future commercial exploitation of women to collect their eggs. can someone explain this to me? i cant understand it well

[young fractal]

its d

[young fractal]

p is done with temp, and q has cl involved.. other two options matched themselves here

[prisma hollow]

can anyone help me understand nember 25-27

[modest oracle]

25-27 = -2. There you go :D

Nah seriously

[prisma hollow]

Gee thanks , cuz this helps

;-;

[modest oracle]

In 24 you wrote that the instantaneous speed of the flower pot aftee 1 sec is 0. I'm not bothering to redo the math to make sure it's correct. I'll just take it for granted that it is.

25)Now, since the pot needs 1 sec to go up to its max height, that means it'll take it another second to come back to its initial height.

26. Let's say someone launches the flower pot and gives it a certain initial potential energy Ek

You'll have, at t = 0s :
Kinetic energy = Ek
Potential energy = 0
The total energy this flower pot has is thus Ek

After 1s, the flower pot has speed 0 but is at its max height (max potential energy). Since the total amount of energy it has is constant, that means :
Kinetic energy = 0
Potential energy = Ek

Finally, when it falls back and comes down to its original height, its potential energy is back to 0.
Therefore kinetic energy is back to Ek (to keep the total energy constant).
Kinetic energy = mv²/2, and the mass of the flower pot hasn't changed mid-air.
The flower pot has same kinetic energy and same mass at the beginning and the end of its mid-air travel => it has the same speed

27. Horizontal and vertical displacements are totally independent in a free fall situation. Therefore, if you only look at the vertical displacement of both flower pots, you'll see they are the same :

• released from rest at the same time
• same initial height (the window)
• same initial speed (0)
• same constant acceleration (-g)

Therefore, they will hit the ground at the same moment. (But not at the same place, because one of them will have travelled a few meters horizontally as well)

[proven cipher]

quick question

does composition of air change over alitude?

google says no

but in my learning objectives there's something about it

[solid sierra]

air is a mixture of gases so the heavier gases tend to stay near the surface of the earth and thus their concentration decreases with altitude

[proven cipher]

so co2, oxygen and nitrogen stay near the surface while hydrogen can reach higher altitudes?

[solid sierra]

yes

[proven cipher]

thanks!

[ashen horizon]

does anyone understand the rate equation and orders of reactants? and could briefly explain to me?

[willow lion]

anyone able to help?

[rancid badge]

Why are there plants with tough leaves?
Would it be a morphological adaptation or am I wrong?

[willow lion]

this as well

thanks

[willow lion]

isn't it tough just because of the waxy cuticle and cellulose cell wall?

[rancid badge]

I understand that, but I need the tough plant leaf function.
sorry for my english 😦

[cunning crescent]

Protection from insects, perhaps?

[pale grail]

thank you

[weary quest]

Can someone help me in bio?

Please

[still olive]

Can someone help me with calculating atoms?

Nothing makes sense

[weak zephyr]

what’s the difference between an intron and spacer DNA? Are they the same thing?

[cunning crescent]

You can post your questions here and someone will help you :)

[flat basalt]

hey! does anyone know how to do this : The synthesis of nitric acid involves two steps. The first step (78.3 % yield)
involves a reaction between nitrogen monoxide gas and oxygen gas, which produces
nitrogen dioxide gas. In the second step (55.7 % yield), nitrogen dioxide gas reacts with
water to produce nitric acid and nitrogen monoxide gas. If the reaction begins with 30.0 g
of nitrogen monoxide and 10.0 g of oxygen gas, calculate the expected yield of nitric acid.
Assume that the water is supplied in excess and that nitrogen monoxide produced in the
second step is not recycled.

[outer walrus]

You calculate the reactant that is the limiting factor and then use the percentage yields to find the final amount of nitric acid yielded

[stable sand]

why is chlorine more reactive than oxygen despite having less electronegativity

[thorny gyro]

@sonic bay
is this to be reported?
its everywhere

[sonic bay]

Open a ticket. Let the mods know

[thorny gyro]

ok
no direct pings na?

[sonic bay]

Yea

[shell drum]

@willow lion yo

[spice aurora]

Help me figure out this question, please

Compound A has a molecule consisting of 2 X atoms and 3 Y atoms. The mass ratio of X and Y is 7: 2. Which element is X and Y?

Thanks a lot!

[cunning crescent]

Is there no other info about X and Y? What kind of compound A is?

[spice aurora]

Yup

[cunning crescent]

Then I guess you just have to look up mass values in the periodic table and find two elements that fit the criteria

[stable sand]

If corrosion can protect metals beneath by forming an oxide layer why is it harmful?

what "eats up" the metal in corrosion?

[modest oracle]

Wikipédia : "Corrosion degrades the useful properties of materials and structures including strength, appearance and permeability to liquids and gases."

An oxid layer indeed forms around the metal, but part of that oxid (the metallic atoms) comes from the metal itself, which means it gets degraded

[stable sand]

hmmm

[willow lion]

Yooo thanks as always

[shell drum]

No worries

[pale girder]

how to do c part of this

[modest oracle]

Newton's 1st law
Sum of all forces = m a

Since there's only one force applied on the body (uniform displacement doesn not count as a force) , F != 0, so a can't be zero either ===> The body undergoes an acceleration

[olive yew]

thanks

[still olive]

thanks you :> but I got help from a friend!

[modest oracle]

Conservation of momentum in a system :
m1 vi1 + m2 vi2 = m1 vf1 + m2 vf2

vi = initial velocity
vf = final velocity (after collision)

Note that we use velocity, not speed

[final beacon]

how to calculate linear density?

[modest oracle]

Do you know calculus ?

Like integration

'cause if not I've a better way of solving the exercisr

[final beacon]

i do lol

[thorny gyro]

i got it online

[final beacon]

lmao thanks

[thorny gyro]

jee/neet 2022?

[final beacon]

2023

[stable sand]

why is blonde hair considered to be recessive trait?

why is blonde hair allele always recessive?
can a person be blonde if only one of their parents is blonde?

[pale girder]

hey can anyone help on a ques of law of conservation of mometnm in vc??

[thorny gyro]

thats my worst topic in physics lmao

[stable sand]

how many x chromosomes does a sperm have?

and how many y?

does a sperm have both or just 23 chromosomes of one type

[pale girder]

le mao

np now

[shell drum]

A sperm has 23 chromosomes, so does the ovum. the first 22 are similar for both. the final one is an x chromosome for ovum. but for sperm , it can either be x or y. ie, there's a 50-50 chance of it going either way.

it is the final chromosome in the sperm which decides the gender of the offspring. if it's an x chromosome, the offspring would have 44+xx (22+x from ovum, 22+x from sperm)

and the offspring would be female

if the final chromosome is y , the offspring would have 44+ xy and the gender would be male

[young fractal]

why does rbc burst in 0.01% soln of nacl but only shrink in 1% soln of nacl? ... confused with the concept here

[stable sand]

thanks

[pale girder]

ty

[weary quest]

Hello

I need help in chem

I was doing this question

And I used the pa/pt=na/nt

So I put: (0.29bar)(1.07bar)/0.797mol

I ended up getting the total mol which was 0.38moles

So I took the previous mole by dividing the total mole 0.38mol by using the mole fraction formula

And It resulted as coming to 2.09moles of Ne

So is that done correctly

[cunning crescent]

I think you need to look at your math again, how can the total amount of moles be less than the moles of the two species?

I suck at thermodynamics so I don't wanna try to solve it for you but I think you should look at it again, that doesn't seem correct

[midnight crest]

Could someone correct this statement if it is wrong

Molecule is the name given to atoms that are only found as diatomic atoms and not found as monatomic atoms like most other elements.

[thorny gyro]

molecules are group of atoms capable of independent existence
no. of atoms doesnt matter
indepnedent existence is main factor

basic question but i cannot remember, when making a graph of results for a report, does the independant variable go on the X axis and Dependant variable on the Y.. or is it the other way around?

[midnight mango]

Hello
First time I ask a question, I need help about General Physics 1
If the velocity of a particle is nonzero, can its acceleration be zero? Explain
If the velocity of a particle is zero, can its acceleration be nonzero? Explain
Thanks.

[vestal pumice]

acceleration is the rate of change of velocity. If the velocity is constant then the acceleration will be zero.
If an object is dropped from a height then, it's velocity will be zero but the acceleration is not.

Initial velocity(u) is zero^

[versed bane]

if the velocity is zero, doesnt that mean there’s no change in velocity thus the acceleration is zero?

[vestal pumice]

The acceleration in this case is acceleration due to gravity which is 9.8 m/s². This sets the object in motion and changes the velocity.

[midnight mango]

the velocity changes, but you note that in this case v=0, I'm a bit confused

[vestal pumice]

The velocity just before dropping is zero.

It's the same with a pendulum

When it's on the extreme position it's velocity is zero

[midnight mango]

really help, thanks

[pale girder]

hey

isnt the graph showing const deceleration instead of const acc?

[modest oracle]

Deceleration = negative acceleration.

Acceleration is a generic word we use in our everyday language, as well as the scientific name for derivative of velocity.

Deceleration is just a word we use in our everyday language, but is totally unrelated to science.

[pale girder]

oookkkk

tyyyyyyyy

[outer walrus]

You have it the correct way :)

[thorny gyro]

thankyou!!

life saver honestly

[outer walrus]

Lmao, I'm sure you'd have found the answer on Google too

[thorny gyro]

i kept getting different answers, i was like first person to reply is what i'll do

i would have thought it would be standard but, can't trust google i guess

[midnight field]

what is the answer for this question?

[final beacon]

@jade solar try this channel

you wont get insant replies but your doubts should get solved quick enough

[jade solar]

Thanks

[thorny gyro]

Can somene explain this to me in layman’s terms

[cunning crescent]

Hi, is there something in particular that you need explained? I think the article does a decent job explaining the subject in an understandable manner, so I'm not sure what you need help with. Is it the names of the nuclei and radiation or something else? :)

[thorny gyro]

No I just don’t get anything haha

I guess I don’t ha e the backgrounds

[cunning crescent]

Ah alright, I can DM u tomorrow and we can discuss it in detail if you wish, I need my pc for it

[silk sparrow]

mathematical models in extrudate catalyst shapes. What is the meaning of extrudate? I google it but cant understand

[upbeat tide]

Hi does anyone here do physics (biomechanics)? Please help me with this

[willow lion]

Whats the equation for dilution factor?

I saw so many different ones so idk which ones the real one

(chemistry)

[modest oracle]

F = ma

[upbeat tide]

that doesn't help or give the answer

that would work if we know her weight force (Wt = m x 9.8) but we don't

and the question wants to find her weight force

even newtons 2nd law you need mass so idk what to do

[thorny gyro]

It’s fine, I appreciate it though

[modest oracle]

-w+F = total Force

[modest oracle]

Better ?

[prime junco]

Sup all, can someone explain me like i'm a 5yo what is crelox

[ashen horizon]

does anyone know what the hill reaction practical is about

[loud aurora]

Can someone help me with this

[pale girder]

hey

whats the method to find tan 40?

[young fractal]

convert it to tan30+tan10 then use the tan(A+B) identity and u should get it

[pale girder]

but what would be tan 10?

ik tan 30

[young fractal]

use tan3x formula

with x as 10

[pale girder]

so it wud be tan 30+30

o

k

[young fractal]

but if u want accurate answer, either use taylor series expansion or they would have given the value as a hint in the question to make it easier

[pale girder]

that wud be 1/root3 plus 1/root3

[pale girder]

i havent studeid taylor series yet

no the value isnt given

[young fractal]

something like this

[pale girder]

ummm

okay tyttytytyt

[willow lion]

If the compound is charged i.e [OH-] then do you add an electron to the more electronegative and if it were to be some element [NH4+] then you remove the electron for the less electronnegative?

[tropic wigeon]

Can someone help in chemistry. The question is: Write the electronic arrangements for each of the . What do these cations have in common? They are:(A1(3 top the one with a plus)(mg(2 top the g with a plus)( na(top the a a plus)

Like this

Sorry for my bad hand writing.

[rough kettle]

Have you learnt about orbitals? The electronic arrangement of all three ions would be 1s2 2s2 2p6. And the cations are all isoelectronic (meaning they have the same number of electrons)

I'm not sure if that's how you write the electronic arrangement, but that's how i learnt it

[tropic wigeon]

Okay thank uu

[visual dirge]

how does climate change affect biodiversity?

[modest oracle]

• Migration of local species due to an abnormal increase of temperature, bringing preys and predators to places they shouldn't be at
  That's a big one and the first that popped to me

Though for such a broad question, I'd recommend you do your own research. That's not something we could totally answer to in a few lines

[potent shard]

which youtube channel can i learn physics

or book that can help me self teach

i want to learn about projectile motion

[thorny gyro]

you could try eddie woo, he has a playlist specifically for projectile motion

[potent shard]

eddie is very engaging in his methods

[thorny gyro]

yeah, i believe from the second video in his playlist and onwards he gives examples which usually helps me

[potent shard]

yes, ill check his playlist

[thorny gyro]

Yep Eddie woo is nice

[gray light]

as climate change causes temperatures to rise at a much faster rate than ecosystems are able to adapt many species cannot survive in the new conditions. It can cause changes in migratory and mating cycles. Species that are not able to follow their required climate like plants or species that require very specialized habitats are especially at risk. Climate change can also cause changes in the pH of the ocean which harms sensitive species. There are a lot more but that's all I can think of at the moment. Also I'm an ENVI major (edited)
-My girlfriend

[modest oracle]

@visual dirge Here's a better answer than mine :D ⬆️

[wet trench]

the organic chemistry tutor, that guy is epic

[cunning crescent]

Hi, can anyone help me with making one trendline for multiple parallels/series in excel? I can only add them one at a time which defeats the purpose of multiple parallels, as I am creating a standard curve

[wet trench]

guys wt does this mean?

i used 1/f1+1/f2=1/f instead of p1+p2=p

my teacher deducted marks for that

even though my answer is correct

this is the question, talking bout part (c)

[thorny gyro]

OK so, I have this gen chem course in college and they are teaching about quantum mechanics and well, they taught what wavefunction is - a mathematical function which describes the wave behaviour of a particle, got that. And then, they said it's also called probability amplitude and squaring it would get you the probability density with which we can do lots of other stuff but my question is that; What is this probability 'AMPLITUDE', what does it signify. IF anyone of you smart people could explain it, I'd be very grateful and will hopefully pass this course

[young quarry]

its a term for the area under the curve

you shouldn't need to go in-depth about it in general chemistry, but knowing what formulas to use should be enough

its very hard to explain and you will learn more about it in physical chemistry, but take the square of the area under the curve to get the probability density(just probability) of a wave function.

[silver gazelle]

Can anyone help me with graph and uncertainties problems?

Wouldn't take much time

But i really need to vc

[shell drum]

<@&717391911132069929>

[rancid badge]

Translation:
A small car travels 0.02 miles in 2.29 seconds, braking smoothly at a final speed of 3.0 m / s.
a) find final velocity
b) find acceleration

[shell drum]

if nobody else helps, I'll solve it in a bit

[rancid badge]

i can wait, thx so much :(<3

[shell drum]

are you sure the translation is accurate? because you said final velocity is 3 m/s and also the first part asks to find final velocity

[rancid badge]

my bad is the original velocity

[shell drum]

so, the initial velocity before breaking is to be found out?

[shell drum]

@rancid badge

[rancid badge]

OMG THANKS THANKS ♡♡♡

[shell drum]

no problem

[civic bone]

i couldnt find this on google, maybe i didnt search enough.
but what stops a denatured protein from folding again? if its just reverted back to its primary structure, why wouldn't it spontaneously fold back into the tertiary structure like a normal protein would if it was put back into its optimal temp?

[upper siren]

the ABO blood grouping abides by which Mendal's law
anyone who can help me with this question?

[thorny gyro]

HELP how do u know which carbon atoms r the chiral centers

[torn oar]

@thorny gyro A chiral center means that the Carbon is connected to 4 different things

So notice that Carbon 5 is connected to an OH, a methyl, an ethyl, and then the rest of the molecule

since none of those four connections are the same atom or branch, it is a chiral center

[thorny gyro]

ohhh does the four substituents have to be distinct?

[torn oar]

Shortly: All 4 substituents on a carbon are different

Yeah

[thorny gyro]

i c i c are carbons 2 and 4 chiral too?

[torn oar]

Yep

[thorny gyro]

nice thank u! helped a lot

[torn oar]

No worries, glad I could help

I just joined this discord like 2 minutes ago lol

[thorny gyro]

LMAOOO what a way to greet u ig

[torn oar]

lol

[thorny gyro]

Most denatured proteins ‘can’ refold in vitro back to their functional forms. This is cause their folding is based on the amino sequence and conditions like optimum temp like u said. But the folding yield of a denatured is significantly lower by spontaneous renaturation. Gradual removal of the ‘denaturant’ is also needed. That process involves more detail ( usually u do it through a chromatography column). Also it is not always guaranteed ull get it back since refolding creates new structures doesnt it. (Haemoglobin is an example). Soo in theory possible but experimentally you’ll need perfect conditions in order to get renaturation and not aggregation.

[thorny gyro]

Welcome :))

[civic bone]

aight yeah that makes sense :D tyty!

[upper siren]

Thank you so much

[thorny gyro]

Does anyone know what fase the nucleus is in when chromatin is compacted to chromosomes? I thought interfase bc the cell isn’t dividing yet but I’m not sure

[stable sand]

is halogen functional group always terminal?

[visual dirge]

what can you say about these pictures? i need your opinions guys :)) thankyou🤍

[hollow nimbus]

help pls

i got 21302.75 for power but thats obvs not an answer

[queen isle]

when summing two vectors what is the difference between first and second equation? thanks in advance

second one is just the simplified form of the first equation

[modest oracle]

The answer's in your question

"Second one is just the simplified form of the first"

So both are equal

So they're the same

[queen isle]

yeah but when i apply they both different

or im wrong

[modest oracle]

They're not supposed to, give example ?

[queen isle]

wait

with first equation idk somehow i got √14800

second is 20√37

[modest oracle]

Oooh

Dude

[jaunty quiver]

Hi all! Who can help me with this question?
EXPLAIN WHY THE WATER STREAM FROM A KITCHEN TAP GETS NARROWER AS WATER FLOWS DOWNWARD?!

[modest oracle]

No that's not how theta works

[queen isle]

explain me pls

[modest oracle]

Theta is the angle between the x-axis and the vector, measuring counter-clockwise

It's not the angle between two vectors

Here, imagine the x axis is placed along vector of 60N, with the origin placed at its tail

That means you have :
(60, 0)
(80 cos60, 80 sin 60)

NOT
(60 cos60, 80 sin60)
(80, 0)

[queen isle]

lemme put in my work

i think the graph is pretty much like u said

i set the 60N as the X axis

any mistake?

[queen isle]

this is the correct answer in my app

or is it just alternative form?

[modest oracle]

Let aside the square root you forgot in the last three line, that's the answer

[queen isle]

so it just the alternative form?

[modest oracle]

Yeah, 20sqrt(37) is just the simplified form of sqrt(14800) = sqrt(400*37) = sqrt(20² * 37)

[modest oracle]

So this expression is false, it should be
sqrt( (a+b cos)² + (b sin)² )

[modest oracle]

And the second one is correct For this arrangement of 2 vectors

[modest oracle]

I literally googled your question, and this is the first web page that came up

https://www.physlink.com/education/askexperts/ae360.cfm#:~:text=The answer is simple%3A Gravity,which is exactly what happens.

[queen isle]

isnt it equal if you set a as the x-axis??

[queen isle]

bcs in my app a is as the 80 and b is 60 one

[modest oracle]

It is if A (=vector 60N) is on the x-axis. If B (= vector 80N) is instead, theta becomes -60°, since you're measuring angles counterclockwise

Oooh

[queen isle]

ahh okay then

thankyou for your answer 🙂

[modest oracle]

Np !

[boreal spear]

The atomic number of sodium is 11 what is the elctron configuration of the soduim give away one electron?

Choices : 2,8

2,8,1

2,5,6

[ember chasm]

2,8

Hope you're not cheating in exam🙏

[thorny gyro]

Anyone here have good knowledge of Binary Search Trees?

[urban magnet]

Just time and space complexity

[thorny gyro]

I’m trying to optimize one using rotations based on an access count but I seriously can’t figure it out

[urban magnet]

You want to make binary search trees like AVL Trees?

[thorny gyro]

Nah not an AVL Tree, I’ve already implemented that, this is more of an Optimal BST

[urban magnet]

Nah dunno much about that, good luck

[visual dirge]

what can you say about these pictures? i need your opinions guys :)) thankyouwhite_heart

[formal bloom]

Let's just say the bugs in cyberpunk 2077 are nothing compared to the hell we will witness when the year comes

[civic kraken]

Hi any Physics major here

??

[fading mango]

When calculating acceleration due to the earth after factoring in rotation of the Earth, why is the angular acceleration subtracted from g? Aren't both of them inwards (i.e. in the same direction) and hence should be added?

for context, this is the diagram I drew but I dont completely get it. I understand why it's minimum at the poles and max at the equator, but I still dont get why it is subtracted

[unkempt raven]

hi guys can I have some help w chem

[cunning crescent]

post your questions and someone will get to you

[thorny gyro]

can someone give me an example of series spring in real life

a real life application

[half pumice]

is math related to science?

[woeful vigil]

what are the factors affecting frictional force ?

help me anybody

[cursive oyster]

Factors affecting friction:

Roughness/smoothness of the sliding object
Roughness/smoothness of the surface
Shape/design of the object
Normal force acting upon the sliding bodies
Dry friction is independent of the surface area of a contact
Type of friction involved(rolling/sliding)
Sliding surface’s state of matter (solid/fluid)

[stable sand]

Which acid or solution is used in the oxidation of ethanol to ethanoic acid
I've many sources, some say sodium dichromate, some acidified potassium dichromate, some say mixture of potassium dichromate and dilute H2SO4 while others say alkaline potassium permanganate solution

[thorny gyro]

well almost everything you mentioned is a great oxidising agent so....and also since you are trying to oxidise ethanol to ethanoic acid,that's understandable ...so i would say all your sources are correct!

[iron dirge]

i would definitely say permanganate in basic conditions or jones reagent! at least those are some of the common ways i've seen in my courses

[cunning crescent]

can anyone tell me where he got the Gamma psi1 and gamme psi 0 representation from?

I should mention this is in physical chemistry, a water molecule and trying to find if an excitation is permitted or not

Gamma x is fine but I don't understand where he got the other reps from

ah fuck nvm

Okay new question, if a transition has A1'' symmetri (so not A1, and not all positive) is the transition permitted?

this is NOT totally symmetric right?

if you multiply two symmetry operations together are they always A1 or is that just for B2

[thorny gyro]

I prefer physics

[lilac patio]

You are confusing centrifugal force with centripetal force...In the frame of ref of us centrifugal force will act..

[reef carbon]

some help??? plss

[wraith moss]

Use 2as=vf^2-v0^2 to get acceleration

[clear silo]

Math is related to this universe so yes science as well

[floral spade]

Can anyone here share with me the resources he used to learn lagrangian equation? course+exercises plz

[sonic bay]

i think it was a joke question. this question was asked by katty perry to neil degrass tyson

[clear silo]

Mhm..I just read that statement so..

[wet trench]

can someone send me the notes for fluid dynamics, i need it asap and i cant find mine

[fading mango]

I have a question about Guass Law:
You only count enclosed charge in the RHS, right? But the expression for flux is also EAcosx where E is the electric field of ALL charges, not only enclosed charges. So how is it possible for enclosed charge/epsilon = total electric field*A?? How can a calculation involving only the enclosed charges give you an answer for charges that are not even factored into the equation??

[fading mango]

these are what I have

it is in slightly condensed form

but it has the main concepts and formulae

[wet trench]

THX A LOTTTTTT

[queen isle]

hi i want to ask about electron configuration, whats the difference between 2-8-8 and 2-8-18?

thanks in advance

[thorny gyro]

I think there is no difference. it is for just helping to write more electron

But Imma search

I didn't find anything

[queen isle]

i think its all about the valence electron since it only range from 1-8, hence if the atomic number is 19 correct way to write it down is 2,8,8,1 since 2,8,9 would have been illegal

[thorny gyro]

U re right

[thorny gyro]

during absorption of carbohydrate in the blood the most rapid trasported monosacchride is????

[queen isle]

little bit of a correction about the reason why its different, its lay down in the n+l rule, as n as principal quantum number and l as azimuthal quantum number ( rule of how electron fulfil each shell), for example we want to fulfill Calium (19) so the electron configuration is 1s2,2s2 2p6, 3s2 3p6, 4s1, notice here that if we sum it all up within each shell the result will be 2-8-8-1 and that the 3d subshell is missing,its because of aufbau principle which electron fills each shell from lowest to highest in term of energy level, 3d is (3+2=5) 4s is (4+0=4) and thats why it fills the S aka the N shell first, hence it is 2-8-8-1, and the written of 2-8-8-1 itself is following the order of atomic shell based in the sequence of KLMN (2 as k 8 as l 8 as m 1 as n) from the nearest to outermost the nucleus and not based in the aufbau principle thats why there is a jump after 2-8-8 to 2-8-8-1 and not 2-8-9, after the 4s subshell filled out it will return to the 3rd shell (M) to fulfill the 3d subshell. i.e 2-8-8-2 -> 2-8-9-2, 2-8-10-2, 2-8-14-2, 2-8-16-2, etc, thus the valence electron is the outermost of the shell i.e 2-8-8-2, valence electron is 2. correct me if im wrong

[kindred tide]

Guys does anyone hav notes or yt vid links related to postulates of thermodynamics

[thorny gyro]

you re right .all of them is true

[thorny gyro]

are you indian??

[kindred tide]

Yep

[thorny gyro]

go check for physics wallah notes ...

[kindred tide]

Ayy not jee college

It's so confusing 😔

[thorny gyro]

but smjh aa jayega postulates vale lecture mein questions nhi karaye hai sir ne utna..toh agar skip krna hoga toh questions skip kerke bss notes postulates ke likh lena ...video ke niche mein notes ka link hoga

[kindred tide]

Ayy no hindi😔

Sowwy

[thorny gyro]

lmao

[kindred tide]

😔

4 postulates

Laws are diff frm postulates

[thorny gyro]

check notes on vedantu on chrome page

[kindred tide]

Okay da

[thorny gyro]

can anyone help me with this question pls

[vapid violet]

I believe it's because the charges outside the volume won't contribute to the total flux through the surface of the volume. This is because the electric field goes in and back out of the volume. So there is respectively a negative and a positive contribution to the total flux and those contributions cancel out.

@fading mango

Behold the drawing

The red is electric field of an external particle. On the right side the contributed flux is negative (electric field in the opposite direction of the normal to the surface), on the left it is positive.

[fading mango]

yeah, someone on the homework help server already helped me out. But thanks for the explanation anyway!

[fading mango]

yeah this was a major 'aha' moment for me. Made me realise that Gauss law is actually just a clever way to reframe how we think about flux and is actually logically pretty straightforward

[wheat ginkgo]

i need a quick help

i know the process of producing ethane from methane

but how do i produce methane from ethane?

is there any way for this?

[young fractal]

hey, what do u call this compound, IUPAC and common name...

[young fractal]

react with chlorine, u get ch3cl and then wurtz synthesis ull get c2h6

[young fractal]

galactose

[wraith moss]

Its cyclohexa2,5-diene 1,4 dione but i couldnt find the common name

[young fractal]

thanks alot :))

[wraith moss]

Np! Also the other name is 1,4-Benzoquinone
https://pubchem.ncbi.nlm.nih.gov/compound/6713333

[young fractal]

got it thankuu

[thorny gyro]

hey can you explain me why...even though glucose is a simple sugar why cant it do faster reabsorption

[young fractal]

glucose and galactose actually have pretty similar rate of reabsorption, galactose just does it faster in more specific situations than glucose

[thorny gyro]

ohhkk thank u for the help

[summer jungle]

Yo guys, so I was given a project and he asked me to build him a dynamo generator? I don't have any degree in engineering, but I do self study, what do you think should I learn?

[cunning crescent]

does anyone have any tips on how to recognize a congruent transformation in a phase diagram?

is this a congruent transformation?

[sage quail]

Im doing IGCSE and does anyone happen to know an indicator named IU??? and from acid to alkali, red to green to purple

[karmic latch]

You mean a universal indicator?

[sage quail]

is that it???? -w-;;;

[karmic latch]

yep x

i think so

[sage quail]

oh thank u so much im clearly lacking braincells rn

[karmic latch]

becaue I am doing gcse science which is very similar to igcse

[karmic latch]

lol np

[sage quail]

ooo i c

[pseudo pike]

Two conductors of same material of equal length and their radii in the ratio of 2 : 3 are connected in parallel to the same source of electricity. The ratio of the velocity of electrons in the conductor will be

pls help

discord nanbargale

[thorny gyro]

4:9?

[pseudo pike]

ans is 1:1 it seems

[wraith moss]

I m not very confident of my answer but i did got 1:1,what i did was
Resistance,R=p.L/A
So the ratio between the resistenc,R/R' will be 9/4 (put A=(2x)^2 nd A'=(3x)^2) )
So since the conductors are in parallel so the current in both of 'em are different .I found the ratio of the current passing through 'em
I/I'=(V/R)/(V/R')
=R'/R
=4/9
Nd thn find ratio of drift velocity
Vd/Vd' =I/I'×A'/A
(Other term cancel out) =4/9×9x^2/4x^2
=1/1

[wide garnet]

Standard equations won't give a convincing answer
I think it's to do with the vertical component but I can't figure it out
Answer's D but I'd like to know why

[cunning crescent]

Trying my luck again, still need help with this

[pseudo pike]

@wraith moss Thank you

[frosty pagoda]

Hi, can i ask some radiation physics question? In photoelectric absorption, the cells will lose e- in K shell and replace by the e- in L and M shells. What happen to the body since the body loses the e- ?

[chilly prairie]

i think nthing happens to body
the configuration changes
it only jumps to attain higher stability
thia can vary from element to element

[frosty pagoda]

oh so it means the lost electron will be then replaced rite ? coz there's still a vacancy in the cell.

[chilly prairie]

yeah probably i am not sure

[languid nest]

https://media.discordapp.net/attachments/661871838510710794/899859982969888868/image.png?width=894&height=670

i need some help with answering

im not quite sure how to start this

[young fractal]

t1/2= log2/k , if u divide log2/12 u should get k for the first one

the formula should be able to get u the rest as well

[thorny gyro]

Why is the Stigma higher than Stamens in most of the flowers?

[wet trench]

can someone explain this question

[obtuse geode]

Somebody please help with this one

[cunning crescent]

I think it's a

[obtuse geode]

I have no idea, i'm confused with A and B but it's definitely not C ):

[cunning crescent]

Google says a

B is three phenyls connected together

No carbon atom in the middle

[obtuse geode]

It says triphenylmethyl

[cunning crescent]

Oh right, the line is a methyl, not a radical

I was confused about that

Welp, then it's d :p

[obtuse geode]

Yeaa, thank youuu (:

[cunning crescent]

Np!😊

[torn oar]

well you just calculated moles of HCl

so divide that by the L of HCl you used to get molarity

and then v is just asking for the average of the 3 calculated molarities from iv

the data seems very unrealistic though because whoever did it was reproduced each titration perfectly down to the mL, lol

[daring canyon]

In some plants the style is shorter( if style is short then stigma will also be lower and vice versa). But in some others, it is longer than the stamens. This condition is called as Heterostyly. Heterostyly is the floral form with reciprocal differences in the length of the style and stamens to prevent self-fertilization.

[daring canyon]

i think its actually called Triphenylcarbenium.

[wet trench]

can someone send the answer asap

[prime pasture]

@thorny gyro ur supposed to use experimental rate law expression for the first 2 questions

u need to create 2 rate law expressions from trials one and 2 respectively and check the change of concentration of A and B (one of them should be constant)

For clarity lets form a rate law eqn : R = K [A]^x [B]^y [C]^z

where x,y,z are the experimental orders and R is the inital rate

now put values of concentration of A B C in R from trial 1 and 2 and divide them

same for 3 and 4

u should get the values of x y and z

then put those values in any one of the equation to get K(which is the rate constant).so by now question a,b and d is done.

Now for overall rate of rxn(n), the formula is simply n =x +y+z

for the last one, it's pretty much the same deal, use the expression, in this case the value of K and xyz remains the same and find R.lmk if u need me to clarify anything

[prime pasture]

volume expansion at temperature T is 49x ..... . So when the new temperature is T+30C u need to find new value of volume n density and divide it with the initial density before increasing temperature.

[wet trench]

ohkk thx

[haughty breach]

plz help me with the iupac name of this organic compound, this is one of my homework question

[prime pasture]

ooh thats big

[haughty breach]

do u know how to solve it?

[prime pasture]

yes holdon im trying

I'm figuring out which branch of nonane should i choose

[haughty breach]

ok, thank ya

[prime pasture]

can u arrange the alphabetic order urself?

[haughty breach]

yeah

[prime pasture]

ok then, I'm gonna write it out in non-organized way. I'm taking the straight chain

[haughty breach]

ok

[prime pasture]

i presume i'm supposed to ignore this

cause if not then the chain is wrong

[haughty breach]

yes yes

[prime pasture]

2,3,4,6 tetra-methyl,4 pentyl nonane

is this similar to the answer?

i kinda have a another answer but that one's a guess

[digital parrot]

Can someone please explain this physics problem

18th one

[prime pasture]

yooo i fucked up, i reedited the answer my bad

i took the ch3 from the L chain as 1 haha. and I didn't take the straight chain btw

[haughty breach]

no worries

btw thank you for your time

some korean guy from another server solved my problem

[prime pasture]

Oh ok

is my ans correct tho?

[haughty breach]

nope

[prime pasture]

dang

[prime pasture]

this is gonna eat my whole night 😂

[haughty breach]

hey hey don't do that continue in your studies

I really appreciate your time you put in to help me

[prime pasture]

it's 2,3,5,6,-tetramethyl-4-pentyl nonane isnt it?

[prime pasture]

this will be my last try haha

[haughty breach]

3-ethyl 4-methyl 4-pentyl 6-methyl nonane

gave me this

in other server

[prime pasture]

oh

yea thats correct. Thanks for the brain ses!

[haughty breach]

ayyy braineer

[glossy dirge]

IF 2 opposite charges are fully submereged in a medium, wouldnt the net force increase. Doesnt it only increase when the charges are same like proton-proton and electron-electron

[glossy dirge]

how is it a carbocation?

the carbon hasnt lost any electrons

[late vigil]

Is the answer D?

The force becomes F/epsilon(or dielectric)

So F= 40N

Here goes the derivation @digital parrot

[glossy dirge]

Yea I'm getting the same ans

I got 1.99N

To be precise

[late vigil]

How did you get that?😂 I mean 40/20 has to be 2 right?

If my method is not wrong

[glossy dirge]

You have to convert cm to meter bruv

[late vigil]

wot? Force is given bruh

[tight wyvern]

what should I do next?

[cunning crescent]

The answer is the last one, the element with the lowest amount is the limiting factor and no more than that may be produced. So the answer is 76.8 moles

[tight wyvern]

okay thankyouu

[dusky chasm]

Hi! everyone can you help me with Assembler,C.. program languages ?

[upper siren]

during mitosis, how is spindle fibre formed in plants when there is no centrosome in plants?

[thorny gyro]

hey hey hey

im having trouble do born haber cycle questions can somehow please help me out

i'd appreciate it

just dm me and ill send the q

s

[thorny gyro]

What in C do you need help with?

[lament ginkgo]

can take poorly differentiated cells

[dusky chasm]

from zero learn

[thorny gyro]

https://www.amazon.ca/Programming-Language-2nd-Brian-Kernighan/dp/0131103628

[dusky chasm]

thank you

[final pelican]

help pls

[quartz zealot]

The hint is big: 30 seconds on google leads you to find that a solid that is yellow when cold and brown when hot is solid_Y. Now you need to find how to get solid_Y by thermal decomposition of solid_X in a reaction that gives off CO2. After this, solid_Y is dissolved with HNO3, and then the cation from solid_Y forms a solid with Iodine, which you can confirm from a solubility table confirms the solid_Y cation

[thorny gyro]

can someone help me in arduino and python (seperate things)

[thorny gyro]

#tech-related-help