science-help

[zealous crag]

Oh

Nope

I haven't done gas laws in a while

Nor thermodynamics

[fast frigate]

yeah kind of sucks i have all lectures recorded and not once did the professor go over anything similar to that

[zealous crag]

Ikr

Phy chem sucks

[fast frigate]

the practical lecture professor literally just gave us homework and even when we asked to do tasks similair to what will be on tests refused so that really sucks

thank god for my math classes i have the best teachers at least ill be able to pass that xd

[zealous crag]

Practicals and online classes

[fast frigate]

yeah

[zealous crag]

Oof

[fast frigate]

doesnt help that the examples we went over in lectures looked like chicken scratch xd

cuz the professor uses a mouse to draw

and freestyles

doesnt prepare

[zealous crag]

Oh no

Well my institute bought iPad and apple pens for all our teachers

So we had no issues like that

[fast frigate]

not sure how ill pass if i dont get an automatic passing grade without then ill have to do the exam and itts a requirement to do at least 1 theoretical and 1 pratical problem completely correctly

so probably gonna fail unless i get super lucky somehow xd

[zealous crag]

Best of luck my guy

[fast frigate]

well thanks anyways mate

needed to vent a bit xd

[zealous crag]

Maybe I can try to revise gas and thermo and come back to you

It's like 1:30 am here tho

[fast frigate]

sounds good, just dm me if you have the time for it if not all good

[zealous crag]

Sure

[odd tundra]

hi guys

[thorny gyro]

can someone help me with basic terms of chemistry?

[tawny elk]

17 th question it's asking about LCR circuit in parallel but I've only done series LCR circuit any hints???

[hybrid linden]

Ya in series LCR you take current as the reference vector. In this case you'll take voltage since voltage would be the same across all branches.

[shrewd musk]

guys what are wheat stone bridges?

[tawny elk]

Thanks sis

[shrewd musk]

ty

[tawny elk]

Np

[stray umbra]

Is orbital size and semi major axis same thing?

[quaint idol]

help

if plants require energy for survival and they make carbohydrate for that, then what is fruit it is also carbohydrate?

why is plant giving away its energy?

@stray umbra

OR ANYONE ELSE

faastt

[glad pulsar]

As our body they also produce excess energy in forms like carbs which gets stored in roots(onion) or fruits

[stoic bramble]

Also Plants use fruits to attract animals, so the animal eat the fruit and spread the seed

[quaint idol]

hmm

[glad pulsar]

:)

[quaint idol]

🙂 sahil bhai

[glad pulsar]

Huh?

[quaint idol]

@glad pulsar is stomata only present in the veins of leaf?

like in this diagram only veins area is zoomed in

https://3.bp.blogspot.com/-9ZPF7VIQ3-E/WV3gVmT7N7I/AAAAAAAACO0/KX9JqOUBwxA6ao6mLLha3yaiMLUM-xsbQCLcBGAs/s320/class10-ch-6-life-process-2.PNG

[green pilot]

Hmm

[quaint idol]

?

pta h?

[green pilot]

Yes

Wdym

U asked a question right

For that yes

It's present in only veins of the leaf

[quaint idol]

like here cross section is zoomed frm the vein of leaf

[quaint idol]

but if thats the case then why other parts of leaf look green

[upper prawn]

Its not just present on the veins..

It's present on the epidermis of the leaves (the top cell layer)

[quaint idol]

veins have vascular tissues right?

[upper prawn]

yep

[quaint idol]

well exactly in between lower and upper epidermis

am i right?

[upper prawn]

stomata are nothing but pores so no its not present in between the two its present on the surface

so that gaseous exchange can happen

[quaint idol]

yah i had mesophylls in my mind mb

[stray umbra]

Why is gravitational force attractive,but not repulsive?
Anyone??

[viral sorrel]

well the formula to describe it is F=-GmM/r^2 beacuse 2 masses attract each other

if you were to find a negative mass it would be repulsive

but there's no evidence of the presence of a negative mass

it's very similar to coulomb force, instead of "two object with a charge of the same sign repel each other" you can think of it as "two object with a mass of the same sign attract each other", but since there's no negative mass, two object with a mass will always attract each other

[green pilot]

sike lol

bro i didnt learn about those things

[minor gale]

is anyone @here doing AH biology and taking the SQA exam?

[hollow star]

can somebody please tell me how to name this? I don't really understand it

[tawny elk]

Let me try

[silk sparrow]

how is the change in temperature will affect the rate constant,k ?

[hollow star]

Thank you so muuuch💜

[tawny elk]

It has been found that generally an increase of temperature increases the rate of reaction as a general rule an increase of temperature by 10 degree Celsius the reaction rate the ratio of rate constant of the reaction at two different temperatures differing by 10 degree is known as temperature coefficient

[tawny elk]

Welcome

[tawny elk]

Btw there is Arrhenius equation also

[silk sparrow]

Ya, im trying to use Arrhenius for discussion

[tawny elk]

K=Ae^(-Ea/RT)
where Ea is activation energy
R is universal has constant and T is the temperature in Kelvin

[silk sparrow]

maybe i will just use this to discuss

Thank you so much for the help!

[tawny elk]

Welcome

[cunning ore]

Can someone explain how using MV=MV for this would let us know theresulting pH will be 2?

I Don’t fully get the explanation

[cunning crescent]

pH=-log[H+]

So in order for pH to be 2, the concentration must be 10^(-2)

Which you then can use to find needed volume to add

HCl is a strong acid, so [HCl]=[H+]

Hope that helps @cunning ore

[cunning ore]

oh but they didnt show that in the solution the just used MV=MV assuming that tthis will result in pH2

[cunning crescent]

I think they're just assuming this is known

[shell rose]

Describe any "real-world" scenario where NEGATIVE WORK on a system causes a DECREASE in the KINETIC ENERGY in the sy

Describe any "real-world" scenario where NEGATIVE WORK on a system causes a DECREASE in the KINETIC ENERGY in the system. *

idk what this is

😭

[thorny gyro]

E.g. A car on the road is moving due to the work done on it in a certain direction,therefore having kinetic energy

Friction works in the opposite direction - 'negative' work, which slows down the car- reducing kinetic energy

remember, negative work = negative force or negative displacement (not both)

[buoyant iron]

They have to show it, like Eva said -log[H+] or -log[OH-] equals to pH and pOH

Khan Academy would be help about solutions of science lessons

[severe palm]

Does anyone have a favourite compound? I have to make a poster for my chemistry class about a "compound of interest."

[zealous crag]

Try H2SO4

Should be pretty easy

[severe palm]

Thank you, I'll check that one out!

[frosty cedar]

A horizontal force of 50 N is applied to X, Y objects with masses of 6 kg and 4 kg, which are tied together by rope on the frictional ground, as shown in the figure. Since X and Y objects are moving at a constant speed, how many newtons is the friction force acting on the X body?

I need some help guys

[thorny gyro]

could someone send me like a deeper explanation for this phenomenon?

https://youtu.be/q8_Y-1qkmfA

would be cool thanks

[thorny gyro]

Can anyone help me with stoichiometry? Hmu if you know how to do dimensional analysis, significant figures please. It's really short

[deep notch]

do you know what lim is in kinematics

[thorny gyro]

explain velocity in simple words pls

[unborn bluff]

lim is a limit

It should be from precalc or calc

It may have an x --> 2 or something underneath it

so as the velocity approaches a specific x value what is its velocity at that point or something i am guessing?

[silk sparrow]

'oversize the reactor discharge pumps to drive the external recirculation through a static mixer into the highly mixed zones' anyone can explain this sentence?

[safe zinc]

can someone help?

[hybrid linden]

Coefficient of friction?

The value is not given what are we supposed to assume?

[thorny gyro]

if it is moving at a constant velocity, net acceleration =0.
so, net Force should equal 0.
Net force is the sum of all the forces acting on an object.
So friction is -50N.

then divide it proportionally to mass: Friction on X body = -50 x 6/10 = -30N

[blazing copper]

Hey so i have a physics problem that i wanted help figuring out. A lift ascends with an upward acceleration of 1.25ms^-2 . At the instant it's upward speed is 2.5ms^-1 a loose bolt falls from the ceiling of the lift, 2.75m from the floor. Calculate the time of flight of the bold from the ceiling to the floor. First i need to figure out the distance it falls. since the height of th elevator is 2.75 i guessed that that was how far it needed to fall, but then i remembered that the elevator accelerates 1.25m's, so the elevator would go up quicker and quicker, while the bolt was falling so then it would have to be less than 2.75. My teacher said it was 2.75 but i wanna know what you guys think. the way i would figure out the exact distance it falls is by makign an equation that describes the relationship betwen the height of the bottom of the elevator and the floor, and another one for the height of the bolt relative to the floor. then i can see where the equations intersect and that wtill give me a marker i can use to figure out the time the elevator took to accelerate to that speed, and then using that i can figure out the time

[late vigil]

Just use the relative velocity concept, assume the lift or the bolt to be at rest, and wtv you assume at rest add the value of its velocity in the opp direction to the another object

Then you have a simple kinematics mechanics problem

And wtv you are suggesting is too much for a single question, you dont want to get into this theoretical physics and all during solving questions, it may lead to many problems with the concept you have built

[blazing copper]

oh i checked with them again and they said i was right, but your method prolyl workss too

i dont think i explained it right

ill try your method too

[late vigil]

Yeah it works but its a very lengthy method, you want to solve questions with most efficient way, eh?

[shell drum]

The displacement occured to a body in unit time

[late vigil]

Displacement*?

Vector form of speed

|Velocity|= Speed

[shell drum]

Have edited. Thanks

[regal heron]

hi guys! I am doing part b and I am quite confused on what to do with the 37 degrees:

i got around 23000 for part b but it seems to be incorrect

i used a random formula and not quite sure the purpose of it, honestly

[shell drum]

is the ans 23959.06?

[shell drum]

@regal heron

[thorny gyro]

Thankyou 🙂

[shell drum]

no problem

[regal heron]

yeah probably because i just realized thats what you get if you are in degrees and im in radians lol

thank you!

[shell drum]

haha. no problem

[topaz night]

can someone explain what an isotope is?

[velvet tundra]

Hi i need some help with this question, the answer is 4 ohm but i dont understand why

Just ignore the other language

[shell drum]

Find the effective resistance of resistors in parallel and then sum it with the 2 ohm resistor in series as explained above

[velvet tundra]

Oooooo

thank you so much

[shell drum]

you're welcome

[thorny gyro]

pls explain alkaline and concentrated meaning

concentrated is like conc hcl

so what does concentrated mean

also alkaline

also ions

I have finally done bio revision

Feeling good

[surreal shore]

good morning. does a gaussian surface needs to have a charge inside or not?

[worthy apex]

Guassian's law is useful for determining electric flux at a point due to charge ; If charge doesn't exist then the total flux at that point is also 0 ,

Mathematically if we put q=0 in electric field's formula than you will find that the flux also be 0

So it is neccesary that a charged object or pointed charge should pe present

[worthy apex]

which creates electric field lines

and finally a flux formed at certain point

[worthy apex]

Firstly if we looks at concentrarion , If you take a cup of water then add sugar in it and continuing mixing it with a spoon , Then a particular amount of sugar dissolved in water now if we take more sugar in excess and add it in same solution then the concentration of sugar in water increases

because concentration is the amount of mols of solute (sugar) dissolved in unit volume of solvent (water)

if solute particles increases per unit volume of solvent then its (solution) conc. also increases

Alkaline solution is the mixture of solute and solvent ; where solutes are the alkali metals and solvent is water

[late vigil]

I just subscribed to you

[worthy apex]

well its a gaming channel

[thorny gyro]

Aye peeps! Not necessarily a science help but is anyone interested to study Neuroscience from scratch?

[thorny gyro]

Can anyone help me with an acid based chemistry assignment?
Need to know like dimensional analysis and significant figures the stuff like 1x10^3. That was just an example. Dm me if you can help

[regal heron]

does anyone know how to do this? im not sure how to get the change in x to solve

[verbal condor]

Hello! Does anyone have an idea about Raoul's Law in Chemistry?

"the boiling point will rise when a solute is added because the additional solute particles will occupy space along the solvent, preventing some of it to evaporate into gas phase. lesser evaporated gas means lower vapor pressure, and lower vapor pressure means that more heat is needed to increase the pressure in order to reach the boiling point."

and am i making sense?

thank you! (so long for three all-nighters.)

[fickle wraith]

From what you’ve written, you just misinterpreted the symbols

[regal heron]

oh um

so 1/2(200)(.3^2) ?

[ruby sequoia]

I'll try my best to give an opinion, because I feel bad just reading this and then ignoring it.

1. "the boiling point will rise when a solute"

[fickle wraith]

yes, you should get 9. I Hope everything is clear. c:

[ruby sequoia]

2. "because the additional solute particles will occupy space along the solvent" - makes sense, both of them occupy space.

[regal heron]

okay, thank you! @fickle wraith

[thorny gyro]

Can anyone of you guys help me if you are available?

[fickle wraith]

sent you a DM

[ruby sequoia]

3. "preventing some of it to evaporate into gas phase" - I suppose that the rate of evaporation of the solvent depends on the solute. However, the solvent dissolves the solute, that's basic. When the solute is dissolved, it will form solution. This solution will eventually evaporate, because the particles with the highest energy will escape the surface of the liquid lowering the average temperature, etc - point is, it'll all eventually evaporate. Because of this, I don't understand why you're saying that some of it's evaporation will be prevented. I disagree. I don't think it would be prevented. Instead, I think it would be simply slowed down.

4. "lesser evaporated gas means lower vapor pressure," - You see, what I've researched is the following: "Strong intermolecular forces produce a lower rate of evaporation and a lower vapor pressure. Weak intermolecular forces produce a higher rate of evaporation and a higher vapor pressure." Due to this fact, I think that it's better to refer to the rate of evaporation rather than the amount of evaporation when you say, "less evaporated gas". (credits: https://courses.lumenlearning.com/cheminter/chapter/vapor-pressure/)

5. "and lower vapor pressure means that more heat is needed to increase the pressure in order to reach the boiling point" - Yes, that makes quite some sense. I think it would be even better to reference this: "The boiling point of a liquid is the temperature at which its vapor pressure is equal to the pressure of the gas above it." to further clarify.

[ruby sequoia]

I really hope that your hard work pays off. 3 all-nighters is a lot. I feel for you.

https://tenor.com/view/pikachu-gif-21381920

[verbal condor]

thank you for your response! (◍•ᴗ•◍) sorry for my bad english, (not my first language) and i understand what you are pointing at. what i meant with "preventing some of it to evaporate" is that some solute particles will block off the surface of the water, kind of like a funnel, where less particles will be able to evaporate, thus lowering the rate of evaporation.

suppose that the black dots are the solute, and the blue dots are the solvent. the extra particles trap those solute, making it harder for them to go to gas state. because it is harder for them to go to gas state, lesser amount of that solvent will become vapor.

we know that the mass of a substance is directly proportional to density, and, in turn, density is directly proportional to (vapor) pressure, and boiling point increases as the (vapor) pressure increases.

going a few steps back, i think that because fewer solvent molecules are able to escape to the air to become vapor, there are lesser vapor, thus lesser pressure, which results to a higher boiling point.

thank you for your feedback!

[verbal condor]

thank you!

[verbal condor]

"The boiling point of a liquid is the temperature at which its vapor pressure is equal to the pressure of the gas above it."

gotcha. thank you again, you single-handedly saved my chemistry homework.

[ruby sequoia]

@verbal condor There are a couple of things I still disagree with.

"suppose that the black dots are the solute, and the blue dots are the solvent. the extra particles trap those solute, making it harder for them to go to gas state. because it is harder for them to go to gas state, lesser amount of that solvent will become vapor. "

Look at this: "the extra particles trap those solute, making it harder for them to go to gas state".

Isn't the solute a solid and the solvent a liquid?

Maybe you mean "the extra particles trap those SOLVENT, making it harder for them to go to gas state".

Or maybe I'm just confused.

Hehe.

[verbal condor]

HALA THANK YOUUU

i did not notice that

[ruby sequoia]

Also:

"boiling point increases as the (vapor) pressure increases."

???

Look what I found

[verbal condor]

***decreases

[ruby sequoia]

"Lowering the vapor pressure of a substance has an obvious effect on boiling point; the boiling point goes up." Credits: https://www.westfield.ma.edu/PersonalPages/cmasi/gen_chem2/colligative/freezing_boiling.htm

[verbal condor]

thank you for pointing them ouuut

[ruby sequoia]

So if one goes up, the other goes down.

[verbal condor]

nooo you are correct~

[ruby sequoia]

I think that the last part of your message is beautifully summed up. "fewer solvent molecules are able to escape to the air to become vapor, there are lesser vapor, thus lesser pressure, which results to a higher boiling point."

Whenever I explain this to anyone, I'll use what you wrote.

👍

[ruby sequoia]

You're most welcome.

[frosty cedar]

Hmm,why do we do that?
I mean we found that the friction is -50 N,then isn't it the friction that is also acts on X body?

[clever mason]

An astronaut travels in a spaceship circling Mars in 20 hours. We have as data: G = 6.67 × 10−11Nm2 / kg2; mass of Mars = 6.4 × 1023kg a) How far is the spacecraft from the center of Mars?
b) How much is the acceleration of gravity felt by the ship at that distance? Does anyone know how to do it

[thorny gyro]

Hi is there by chance someone who understands physics basics?

[polar temple]

@thorny gyro me

[polar temple]

Still want it?

[clever mason]

Yes please

[thorny gyro]

F = ma; Force acts proportionally to mass. As there are two bodies that are experiencing the force in the forward direction, we theoretically can combine them to find the overall opposite force(friction).However, the force actually acting on each body is different because they have different mass. So friction will also differ

[regal heron]

i feel like this question is worded weirdly

im thinking it is A but the eggs technically were thrown at the same force so im not sure

[spring tide]

can someone please help me with nuclear physics

I got the first three parts done

but the last part was kind of strange for me

since the atomic number A is arbitrary, that means that we can not use the bohr radius as the radius hence I used the r= (a*n^2)/A

but the ratio turned out to be so small that i do not trust my own answer

[cedar swan]

Can somebody tell me how mgsin(v)-μmg*cos(v)=0 can be written as μ=tan(v)

[shrewd musk]

are AIDS and HIV non curable?

[spring tide]

can you write it out?

[buoyant iron]

As i know HIV virus can't be destroyed from humans body yet, but with medicine u can control and live with it. There are plenty of people which lives with passive HIV virus

So yes, curing AIDS completely is not possible yet

[heavy path]

@cedar swan

[cedar swan]

thank you!

[thorny gyro]

Your handwriting is pretty good

[cedar swan]

Thanks, I was trying to make it look readable since I was showing it to someone, normally my handwriting is terrible.

Here's an example:

[viral sorrel]

ok so, i assume it's μmgcos and not sin

first of all , do you know how equations work?

@cedar swan

[cedar swan]

Yes. Here are the steps I learnt:
mgsin(v)-umgcos(v)=0
mgsin(v)=umgcos(v)
sin(v)=u*cos(v)
sin(v)/cos(v)=u
tan(v)=u

u is the frictionsymbol, idk how to make it on the phone

[viral sorrel]

sounds like you don't need help anymore

[cedar swan]

I just didn't know that sin(v)/cos(v)=tan(v)

[viral sorrel]

i see

[cedar swan]

If it's not too much of a pain, could you show me why sin(v)/cos(v)=tan(v) with a drawing?

[viral sorrel]

that's a definition

tan(a) is defined as sin(a)/cos(a)

i could show you a graphic of tan(a) and show you that at a=pi/2 tan(a) goes to infinity but that's because tan(a) is defined as sin(a)/cos(a)

[thorny gyro]

A and B are heteronuclear diatomic molecules, both having hydrogen as one of the atoms. The electrostatic potential mapping of A and B look very similar, except that the color of hydrogen region in A is blue while it is red in B. Identify A and B. need help in this (chemistry)

[shrewd musk]

tyyy 😊

[cedar swan]

Nah I'm good, thanks for the offer tho <3
I thought it was something that could be shown just by a triangle

[fickle wraith]

I'll try guiding you to the answer: what do the coloured regions represent?

[fading mango]

Current electricity can only be transmitted via electrons right? So say, for example, you are given a cubic cm of copper that has 2.5 x 10^24 electrons.

Does that mean that this piece of copper can only conduct a finite amount of electricity, since it has a finite number of electrons? And if so, what happens when you try passing excess current through it?

[unique minnow]

I dont know the detail since I'm quite out of touch in physics
But when you pass excess current in a wire, the wire heats up and eventually melts breaking the circuit. That's what happened when a filament lamp is burnt out.

maybe that will helps

[fading mango]

Yeah I know that, but my question pertains to whether or not the melting of a wire has anything to do with the number of electrons it has

[tender lagoon]

this feels so easy but i don't know why i can't figure it out 😭

wait

actually yea nvm

can't figure it out

WAIT

I CAN FIGURE IT OUT

NEVERMIND LOL

[finite gale]

not sure if this is correct or not but here's what I thought...
The number of free electrons are fixed for any material unless you change the temperature or keep it in an extreme environment.

The other method to increase current would be to increase the potential difference

but that would just increase the rate of flow of electrons, and cause heating

In the case of passing infinite current, you may be familiar with short circuits... Infinite current flows in the wire which causes a lot of heating

[thorny gyro]

Help me in this guys please

Does anyone know the surface tension of tetrachloromethane?

[fickle wraith]

I've found in a slide 2.68e-2 J/m^2

[thorny gyro]

Thanks!

[burnt cedar]

Can someone help me 🙂

[thorny gyro]

310
373
-173
100

[thorny gyro]

I found like this

[weary star]

can someone help me with physics?

DM me please

[burnt cedar]

Thank you so much!

[thorny gyro]

U re welcome

[dull zealot]

can someone help with this?

[thorny gyro]

could someone please help me

I understand nothing

[west willow]

can you pleasee help me with the angle???, the resultant force is 0, B=30 and C=50

[quaint idol]

Yo can help yourself in these one ._.

[balmy gyro]

You can turn each force into two components,vertical and horizontal, and the vertical net-force are 0 so as the horizontal one.

or just simply using Lami's theorem lul

[thorny gyro]

Okay thank youuuu

[median orchid]

what's the ligand name for S^2- ??

[lyric trail]

sulfido

[median orchid]

thank you!

[tender lagoon]

can someone help

[bold aspen]

help pls

[lyric trail]

second option, because charge can only exist in integral multiples of 1.6x10^(-19)

[bold aspen]

kk thanks

this one is a bit trixky

the answers

[lyric trail]

you can use this formula , i can send you the derivation of this formula if you want

[west willow]

tysm broo

[west widget]

plz help

[lusty narwhal]

240 Nm

Once the 10 kg weight is cut, the system is not in equilibrium so, M = F*m => M =
m * g * x => 6 * 10 * 4 = 240 Nm

[thorny gyro]

A good educational meme🙂

[rancid badge]

i need help The decay rate of the radioactive element is directly proportional to the amount of matter available. Suppose that in 25 years 1.1% of a certain amount of radium has decayed. What is the half-life of radium?

[cunning crescent]

25/1.1*50

[rancid badge]

Can I talk to you so you can help me with the development of the exercise?

[cunning crescent]

Sure

[thorny gyro]

Me in class 10 seeing all these high class questions:

[glass ledge]

XD ur not alone

[thorny gyro]

But I'm alone

[thorny gyro]

Your pfp is my pfp in ms teams

[glass ledge]

ohh noice

[glass ledge]

n who uses Microsoft teams when zoom exists -_-

[thorny gyro]

I know right

School just refuses zoom

[glass ledge]

XD

[tender lagoon]

do u still need help

i can help

[silk sparrow]

Anyone knows what's the meaning of 'ramification of design' ?

[fringe hill]

how the design affects things

[silk sparrow]

Thank you!

[thorny gyro]

Google.com

[silk sparrow]

I tried haha

[thorny gyro]

Ohh

[lone juniper]

Hey can somebody help🥲

[thorny gyro]

c

[lone juniper]

But here the answer was b and I can’t understand why 😭 like how did they even introduce a negative charge in the answer

[sand mason]

Anyone knows the answer to 30th? I got OE but the answer is OB

[cunning crescent]

To me it seems to be an error in the assignment, as in the question they refer to the charge at M and N as positive. Ask your teacher about it if you can

[lone juniper]

Yess like literally everyone I asked from told me the answer was c 😭 I think the answer might be wrong only

[echo perch]

Lets go thru this step by step. First find out the resultant for the electric field of +Q charges at O. Then find the electric field of the -Q charge at
O. The direction of both the field is opposite. So, the direction of the net E is in the direction of the field of larger magnitude. And that will be your ans.

Use E= KQ/a^2 for finding the field strength at O

[sand mason]

Okk I'll try thankyou

[thorny gyro]

anyone is here

[thorny gyro]

waitup

i got it

is it 10 ohm

yupp 10 ohm

[lusty narwhal]

ok🙂

[thorny gyro]

im still sending the soln if u have a doubt

[lusty narwhal]

neat, it helps to look the circuit as two triangles

[thorny gyro]

yaa

it was hard to understand

[shell drum]

Just read about wheatstone bridge arrangement.

[thorny gyro]

okk

[tender lagoon]

quick question but when photons are more energetic, does that mean frequency increases or amplitude increases?

[thorny gyro]

frequency

[tender lagoon]

thankss

[thorny gyro]

here i was just taught how to solve never heard of wheatsone bridge arrangmentt

[shell drum]

It made sense now. right ?

[thorny gyro]

love your username

im studying but stu is silent

[shell drum]

Not yet there. In a couple of semesters , for sure

[thorny gyro]

well thats how i solved it

r1/r2=r3/r4

[shell drum]

The potential difference between two points of bridge is zero, so effeectively , no current flows through

[thorny gyro]

but im 14 in school

when were you taught this

[shell drum]

I studied it back in school too

like 10 years ago

🥲

I'm old

[thorny gyro]

4 years ago for me

in my grade 9 or 10

hm same

i came in 11th

[shell drum]

grade 10 yes

[thorny gyro]

yupp

[tender lagoon]

Can someone help me with this

I still don't get the mark scheme

[thorny gyro]

but doesn't the mass of electrons decreases over time as it emits photons

[tender lagoon]

I assume more energy means higher momentum so higher mass

plus they wouldn't give us false info I think

[tender lagoon]

Wait nevermind I get it now

[thorny gyro]

@tender lagoon u want answer or mark scheme?

[tender lagoon]

I wanted someone to explain the answer but I get it now

Thank u tho!

[thorny gyro]

@tender lagoon ok no problem

Anyone here preparing for physics olympiad? @all

[solar niche]

Pls can someone how to solve this : what volume of 85% H3PO4 solution must you take to prepare 250ml of a 1M H3PO4 solution ? (d = 1.71)

It's been a while since I did this kind of exercises ://

[thorny gyro]

Any one preparing for physics olympiad here?

[cunning crescent]

Do you know what the d means?

[solar niche]

It's density

[cunning crescent]

As in g/L? Use that to convert 85% to Molarity, then use the c1V1=c2V2 formula

Let me know if you need more help than that @solar niche

[solar niche]

I think I've found the answer (16.8 instead of 17.1) but I don't know if it is the correct way 😅

[cunning crescent]

Send a pic :) I'll look at it in the morning if you don't get help (it's late now so I'm going to bed)

[jagged fossil]

whats a penis?

[fringe hill]

It's part of a male animal's body used for reproduction.

[solar niche]

Here you are ^^

[cunning crescent]

Hmm I got a similar answer (16.86) using a different method, so it might be correct just a difference in rounding, but I don't understand what you've done in the second calculation - why do you multiply 24.5 with 100/85?

[acoustic dagger]

Does anyone have any zoology anki decks? I'm struggling finding a nice one!

[solar niche]

Because the masse is taken (85% of H3PO4)

[blazing copper]

which is more accurate. acceleration is defined as the rate of change of velocity of a (MOVING????) object

with or without moving

[shell drum]

rate of change of velocity of an object . It can be at rest too. If at rest acceleration is considered as zero

[blazing copper]

yeah i thought that too but my prof put the definition as movin

[twilit rampart]

Yooo can anyone tell me the correct acidic strength with reason?

[twilit rampart]

Need your help chemistry folks

[thorny gyro]

i will be learning this

have no idea what this is

[thorny gyro]

anyone

has the solution

pls

[late vigil]

Can someone explain to me the working of unbalanced/inverse wheatstone bridge

[thorny gyro]

pls tell this answer

and share the solution

[cunning crescent]

Look at molar masses for FeO and Fe3O4

And please don't spam

[thorny gyro]

i didnt spam

[cunning crescent]

OK, so the first thing you did was find the weight of 250 mL of 1M H3PO4. Then you multiply this by 100 and divide by 85, what is it that you get? Not 85% of the first solution, as that would be 85/100. And 85% does not mean 85% of 1M either, it is a different way of expressing concentration. I'm not sure this is a valid method, sorry. Can you send me a picture of the exercise in its entirety?

[gritty ingot]

I can't really tell what is the correct acidic strength, but i would say that everything in E. has a pH strength of greater then 7 and in F. lower than 7,
because of all of the "O" that would grab an H⁺ from H2O to form OH⁻ and OH⁻ is alcaline
In F. it is really the same thing but here the molecules are going to let go of the H⁺ the molecule would become negative and the H⁺ + H2O are becoming H3O⁺ -> Acidic

Hope this can help.

[thorny gyro]

can anyone send this solution pls

[cunning crescent]

This is the way I did it @solar niche

[stray umbra]

Can anyone help me with this

[shell drum]

Just saw this

@stray umbra

[stray umbra]

Tysm 😾🤍

[shell drum]

No problemo 🤘

[thorny gyro]

i really like how u help everyone

keep up the good work mate

[shell drum]

Thanks man!

I do it when I'm taking a break or when I'm bored. I'm bored a lot these days I guess

[thorny gyro]

Anyone help in kinematics

[solar niche]

It's in French sorry :/ but I did it again with the same formula you did and i have 16.89 ml too !

[cunning crescent]

oh it's fine I speak a little french haha, but I'm glad you got it! I thought the density was something you were given in the assignment hehe

[solar niche]

Yes they gave it to us but in another page 😅

[cunning crescent]

oooh I see

[stark knot]

hi guys, if anyone here work/study plants and have a great article about "origin and evolution of terrestrial plants" I would be glad to have any recommendations. It's for a presentation I will have to do with my group in a class of the graduation. I already have some articles for the research, but if you you have some recommendations, I appreciate.

[thorny gyro]

Can anyone help me with some stoichiometry problem? i have to use dimensional analysis, significant figure and scietific notation in my answers. its only one problem though. dm me if you can help

[rugged apex]

uh hi can you all guys help me with my assignment today

[rain talon]

hey ummm i have a Free body diagram Question (Physics)

can ab help

can someone tell me the method to solve this'

elevator qs

[rugged apex]

HELP

[rain talon]

ooo

tysm

[lusty pine]

Correction : The downward weight must be 16*g

[rain talon]

yea k tysm

[rugged apex]

help please

[rugged apex]

thankyou mate

i got one more problem can you help?

[lusty pine]

Sure

[lusty pine]

Use ideal gas equation and eliminate options

[rugged apex]

ok

[lusty pine]

Equate weight of the object to buoyant force applied due to fluid displaced

[rugged apex]

k

[rugged apex]

i am getting answer as option C

[lusty pine]

What’s the answer given?

[rugged apex]

dunno man it is an assignment

[lusty pine]

Even I am getting C

[rugged apex]

okay

[sudden summit]

Hey!

can anyone help me?

[candid fern]

what is your problem?

[rugged apex]

please help

[marsh latch]

Can anyone tell me the difference between Interference and Diffraction please

[thorny gyro]

interference is when u put two wave in relation : they can be constructive or destructive, you can calculate the interference figure by finding the variation in position between two element of the systeme sometime mark as Delta(L).

[sudden summit]

is 14.5 haemoglobin good for a 13 year old 161 cm tall ???

and does heavy physical activity

[sudden summit]

a boi

[thorny gyro]

Diffraction is a phenomena involving one wave and it's separation most of the time such as young model, the interference phenomena can be involving in the diffraction one but in diffraction you try to seprate light wave 🙂

[marsh latch]

Thank you !

[leaden pulsar]

@lusty pine what program did u use to make these stunning visuals?😯

[frosty cedar]

Hmm,I understand now.Thank you pal ❤️

[coral vortex]

Currently working on a physics gr. 11 assignment, please ping/dm if you would be interested in proof reading/correcting. This assignment is basically worth as much as the test I failed and is meant to boost grades. I really need the grades as I am enrolled in Pre-med next year! Thanks in advance.

[lyric saddle]

can i get help

[hardy veldt]

Im working on low level chemistry (naming/formula writing/classification) and was curious if anyone would be willing to check a few of my formulas. Thanks in advance if anyone can help 🙂 (dm me for the picture)

[thorny gyro]

any help would be appreciated!

[thorny gyro]

Heyy guys can anyone pls explain or define quantitative science?
Would really appreciate.

[lyric saddle]

can i get help with these 3 questions

1. ) A mass of 72 g of sulfurous acid, H2SO3, is dissolved in 4.5 L of water. What is the molarity of the solution?

2.) One beaker of 430 mL contains 18.3g of MgCl2 . Later, 250 mL of water is added to dilute this solution. What is its final concentration?

3.) How many grams of NiCl2 are needed to prepare 2.50 L of a 0.400 M solution? ```

[marsh latch]

Can someone please explain Mesomeric and Inductive effects of organic compounds in simple language : )

[errant solar]

can anyone help me do c

[thorny gyro]

Find the temperature at which air posses a density equal to that of hydrogen at 0°C. Density of air at STP is 14.4

[shrewd musk]

inductive effect, is when for example : you have HCl , in this, Cl is more Electronegative than H, so the polarity will be induced more towards Cl [the arrow will be more towards Cl since its more EN], because of which the Cl has a partial negative charge and the H has a partial positive charge, also the inductive effect decreases as it travels

[thorny gyro]

can someone help me please

[shrewd musk]

mesomeric effect [in short]- it is also known by the name of resonance effect, in this there is polarity produced in the molecule by the interaction of two pi bonds or between one pi bond and one lone pair present on adjacent atoms

[marsh latch]

Thank you ! @shrewd musk

[errant solar]

I cant do this with the frictional force

[shrewd musk]

anytime 👍

[shell drum]

Was probably asking what app did you use to write your answers

[shell drum]

Did you get c ?

[errant solar]

yeah

1.03

but don't know if it is correct

[shell drum]

i didnt solve it yet. let me check

OA is 20 m right ?

[errant solar]

yeah

[shell drum]

ffrictional frce 2 N

[errant solar]

yep

[shell drum]

it's correct

[shell drum]

This is how I solved

[shell drum]

I’ve used Vo as “u” in the equations . Don’t get confused since I rote Vo first and then didn’t use it anywhere else

[errant solar]

thanks! I also did the same way

please help with c of this one if possible

[shell drum]

I’m a bit rusty , give me a moment

[errant solar]

ok no probs

[shell drum]

15 minutes?

Time taken ?

[errant solar]

ok

[shell drum]

No no, the value

[errant solar]

no 5

[shell drum]

Okay

[shell drum]

I feel the question is incomplete tbh. Because Inorder to find the work done , we need to find the height through which the water is pumped as well as the vol of water pumped.

I'm confused if I should take both as 10m and do it

[shell drum]

If you have the solution , can you check if it's around 85%

[errant solar]

idk the answer unfortunately

[shell drum]

Oh

[errant solar]

can you check if my 1d is correct

[shell drum]

no

i don't think it is

[errant solar]

v isnt 0 i guess

[shell drum]

Initial velocity is not 18.97 either . Since we’re taking the vertical motion into consideration

The vertical component of velocity is zero

Also , v isn’t zero either since the body coming to rest would be because of it reaching the ground and not due to external forces acting on it during transit

[errant solar]

so initial velocity is 0 and I need to find final velocity?

[shell drum]

use v^2 = u^2 + 2as and find v

use that value on v=u+at and find t

answer I got is 2.02s .

[errant solar]

I already got the answer and thanks for helping!!

[shell drum]

sure

[errant solar]

also, what software thingy do you use for writing?

[shell drum]

Goodnotes 5 on ipad

[errant solar]

oh so you use a ipencil?

[shell drum]

apple pencil 2

I use an ipad air 4 (2020)

[errant solar]

are you from india?

[shell drum]

yeah

[errant solar]

haha guessed from the time

[shell drum]

nice job. Also , did you understand why the second question feels incomplete ?

[errant solar]

yeah

[shell drum]

The power output should be found out by solving mgh/t

To find m , we need volume of the water and we need h. If Intake depth to find volume of wter pumped , I wouldn’t have h . If I take depth as h , I won’t be able to find mass of water pumped.

Unless I’m missing something here. Do ask your friends though. I’m not sure if there’s another way to go about that problem. I learnt this ages ago

This is 11th physics right? Work power energy?

[errant solar]

ok thanks! May I ask how old are you/ In which grade you are studying rn?

[errant solar]

no, 9 and 10 (we have the same book for 2years)

I'm not from India :)

[shell drum]

oh cool. Since you asked me I assumed you were from here .

[shell drum]

I'm a civil engineering graduate now pursuing my masters

[errant solar]

oh cool!

[shell drum]

Good luck with the rest of the exercises. See you around

😊

[errant solar]

yeah!

[shrewd musk]

hihi

[lone juniper]

Yall when we are calculating molar conductivity why do we divide it my 1000L/m^3 when it’s for metres and multiply by 1000cm^3/L....like why don’t we get the answer just by multiplying in both cases what difference do we make when we multiply on one side and divide in the other?

[lone juniper]

Nvm nvm nvm Yall I got it

[outer walrus]

NCERT xD

Nostalgia

[torn oracle]

can anyone help with this question

[gritty creek]

A clock is set right at Tuesday 10 a.m. The clock gains 10 min in 24 hours. What will be the correct time on the following Thursday, when the watch indicates 8 p.m.?

[thorny gyro]

hey

[lone juniper]

8:20 pm? Um not sure

[regal heron]

could someone help me do this problem here? not quite sure what to do

[vast aspen]

@regal heron i tried it but not too sure if it's right

[regal heron]

hm that looks right to me i think

uh let me double check give me around 5 mins im gonna see

[autumn panther]

In E=V/d (which is the electric field(charge plates)) formula what does V stand for and what does d stand for please help!

[regal heron]

yeah thats right, thank you! i understand it now

[vast aspen]

I'm glad I could help! :D

[tender marsh]

V-potential difference between the plates, d- distance between the plates

[autumn panther]

thanks

[stray umbra]

II should change the 'g' ? Or is it correct?

[thorny gyro]

Put g= GM/R^2

[cunning crescent]

9 mol H2, 6 mol NH3

[scenic lily]

plz help me

[dark rover]

any tips to memorize organic chemistry reactions? 🥲

[wraith hornet]

The best part about organic chemistry is the patterns involved are easy to recognize once you familiarize yourself with them.
If your foundations are strong, you have an easy grasp of bonding, trends in solubility, boiling/melting points, functional groups, isomerism, naming etc. then most reactions can be clubbed together into how a particular reagent acts with most reactants.
The exceptional cases have to be learnt separately (there is a pattern to it as well, but it is not necessary to stress on that unless you wish to pursue chemistry as a course in university)
Familiarizing yourself with the equations would require you to look at your notes/book multiple times, maybe even scribble them down each time you revise.
Since the named equations are fixed, you have to remember it through repetition (basic trends are valid here as well and make the job easy)
For me flash cards don’t work for memorizing that well unless I have been studying the reactions several days in advance.
Take some time out every single day to look at your notes once, the consistency will pay off. I do not know of any quick methods of learning organic, these are the methods I use.
I hope this helps. Good Luck!🍀

[rain talon]

A 16 kg block is kept on the floor of the lift. The lift is moving downwards at a constant acceleration
of 1 m/s2. Draw FBD of the block. What is the normal force on the block by the lift?

can ab help

is it N = mg- a*m

[cloud igloo]

what's the answ

[shell drum]

yes

[rain talon]

k ty

i got 13.2

A 12 kg block is kept on a weighing scale, on the floor of a lift. The weighing scale is showing a reading of 9.5 kg.
What can you say about the motion of the lift?

also this onepls

[cloud igloo]

I've got 14.3

[rain talon]

nah

mass is 16

[shell drum]

it would be in hundreds

around 140 ish

[rain talon]

N will be 132

[cloud igloo]

ah it's the normal force. 140.8

[rain talon]

and weight will be 13.2

[shell drum]

the first one i mean

[rain talon]

in the answer sheet it is 13.2 tho

[shell drum]

F= 16 (g-a) = !6*( 9.81-1) = 16 * 8.81 = 140.96 N

oh

[rain talon]

it says use g as 10

also it says the reading on the scale not normal

[shell drum]

okay. Still , it'd be 16*9 which is 144

Are we still talking about the first question ?

[rain talon]

yep

[cloud igloo]

I think so

[cloud igloo]

shouldn't it be this?

[rain talon]

shit sry it was a diff q

A 16 kg block is kept on the floor of the lift. The lift is moving downwards at a constant acceleration of 3 m/s2.
Draw FBD of the block. What will be the reading on the scale?

this was the q

[cloud igloo]

bruh.

[rain talon]

lmao yea ur right it is 144 N for the 4th one

sryy

[cloud igloo]

lol

[shell drum]

yeah

[rain talon]

12 kg block is kept on a weighing scale, on the floor of a lift. The weighing scale is showing a reading of 9.5 kg.
What can you say about the motion of the lift?

and trhis one

pls show me method too first time doing FBD

[cloud igloo]

downwards accelerate

[shell drum]

free body diagram , if my memory serves, is a diagram which represents various forces acting on a body

[cloud igloo]

the value on the scale is always the normal reaction of the body

[rain talon]

at what speed

[shell drum]

Is it 2.5 ?

do you have the solution ?

[cloud igloo]

0.2?ms^2

acceleration

[rain talon]

hmm its 2.5 m/s2 but howd u get it

[cloud igloo]

MG-n =ma

[shell drum]

i did it at the back of my head, Let me write it down

[shell drum]

If the lift is at rest , it should show the original mass , ie, 12 kg

here , the scale shows 9.5 kg

[rain talon]

ohk

[shell drum]

N = mg-ma ; 9.5 * g = 12g-12*a

solving

[rain talon]

95-120 = 12a

-25=12a

a=-25/12

right

[shell drum]

120-95

yeah

[rain talon]

i get 2.083

[shell drum]

I’m a bit busy rn , but I’ll write it down and send the soln in a while

[rain talon]

okh

can u dm it to me so it doesnt get lost in here

[shell drum]

sure

[dark rover]

Thank you very much for the detailed answer! im preparing for an entrance exam like 15 days away, so ill try to learn the patterns!

[shell drum]

This is how you get the direction @rain talon

[rain talon]

can u xplain why the 10 im rily sry to bother ye'

[thorny gyro]

can anyone help me?

[shell drum]

no no , the answer is 25/12 which is 2.08

There must be an error in the solution

[thorny gyro]

do you know how to do this?

[shell drum]

This ?

not really. I've lost touch

[thorny gyro]

can you help me with any other ones?

[shell drum]

If it's chemistry I might not be the best one to ask help from

[thorny gyro]

Oh damn lol

@cloud igloo Do you know how to do this?

[cloud igloo]

which one

[thorny gyro]

both

as well as these 2

[wraith hornet]

I hope your exam goes splendidly. I wish you the best of luck for it.💛🍀

[cloud igloo]

I'm not quite sure about these tho

[thorny gyro]

can i dm you some other ones?

[cloud igloo]

yeah

[thorny gyro]

sent you a friend request

since your dms are closed

[topaz night]

"In gases, the velocity of the particles is symbolized as urms. The quantity is known as the root-mean-square (rms) velocity because it is the square root of the mean square velocity in a population of molecules in a gas. The rms is directly proportional to the square root of temperature and inversely proportional to the square root of molar mass. Therefore, if the temperature is quadrupled in a given gas, the molecules have doubled the rms." can someone please explain, it's quite hard to understand

[cloud igloo]

This should explain it

[topaz night]

thank you very much:D

[solemn raft]

Does anyone have notes on atom economy?

[sterile flare]

Hey, I just started learning general relativity, and im now studying tensors, and the lesson was writing an invariant in tensor notation. The whole ds^2 equation but as a tensor. they first put everything as ds^2 = sum over mu & sum over nu dx^mu dx^0 era _ mu nu, which was another tensor holding values, and dx^0 being the time dimension in the vector dx^mu. They rewritten it differently as the same thing but dx^0 became dx^nu, how? that makes no sense to me

i can take a picture if you want

[regal trail]

are there exceptions to hubble's law?

[blazing copper]

brhu why are non-sister chromatids a thing

why not just call the homologous chromosomes

[lone juniper]

Welppp

[sterile flare]

no, im mostly confused about how tensor calculus works for general relativity, im not very familiar with tensor calculus either

[regal trail]

this is about space?

@sterile flare

[sterile flare]

no, physics and general relativity

[regal trail]

its about planets

and determining their speed

[sterile flare]

kinda, its just part of my physics course

im just starting learning about it

[regal trail]

well i hate to tell you im taking geosicence

[sterile flare]

oof

cant help?

[regal trail]

wdym

[sterile flare]

can you help me with my problem?

[regal trail]

i have no idea what any calculus is

[sterile flare]

I took notes in class, but i didnt understand what was written on the board

[sterile flare]

oh

[thorny gyro]

same

[thorny gyro]

what is the mass of Mgs when 2 gram of of Mg reacts with 2gm of sulphur

StrawBerryFish
what is the mass of Mgs when 2 gram of of Mg reacts with 2gm of sulphur

anyone answer pls

[wet trench]

can someone answer this question with the working
A 10 g bullet is fired with a velocity of 300 m/s into a pendulum bob which has a mass of 990 .How high does the pendulum bob(plus bullet)swing after the collision?

[thorny gyro]

momentum

after collision before collision is same

[celest gorge]

Apply Conservation of Energy. Intially assume the pendulum bob and bullet has zero potential energy ( because only the diiference matters) and bullet has kinetic energy 1/2 * 10 * (10^-3) * (300) ^2 (in SI units). After the collision the bullet will stick with the bob. at the highest point the kinetic energy of the bob+ bullet will be zero, only potential energy will be there, i.e. (10 + 990) * (10^-3) * 10 * H. equating the two, you can solve for H.

[wet trench]

Thx guys :) @thorny gyro and @celest gorge

[thorny gyro]

i read dalton's theory whole night without sleeping

and today i found out rutherford proved it wrong

https://tenor.com/view/sad-crying-sad-blake-blake-mitchell-blakemitchell-gif-13793512

[loud jackal]

Can Anybody Help me .. ? How Element is taken in 2nd case

[old crest]

I have an SAT physics test on Saturday, I had some stuff happening so I couldn't study. Any advice on how I can cram an entire textbook and still do good within less than three days?

[celest gorge]

focus more on topics(chapters) with more weightage. try active recall method. rather than cramming by book open, first study the book and then write it yourself on the paper without the book open.

[thorny gyro]

Solve examples

Related to the subject

[solar niche]

Can anyone here tell me if what I did is correct or wrong please? 😊

[tender marsh]

I'd say it's 0 but I am not 100% sure

[lone juniper]

Actually there it’s answer was 18 but I got 27💀

[tender marsh]

we're both doing smth wrong lol 😂

[lone juniper]

Hahaha yesss bestie 🥲

[steel anvil]

does anyone know how to do this: Calculate the solubility, in grams per 100 mL of water, of potassium sulfate if 1.20 g of the solid dissolves in 10.5 mL of water at 20 °C. 🥲

[radiant steppe]

anyone taking the mcat this summer

[thorny gyro]

could someone help me please

i used the equation but got it wrong lolol pls explain 🧖‍♀️

[cunning crescent]

Do you still need help with this? I think it's just (1.20/10.5)*100

[steel anvil]

yea i had a feeling it would be that, thank you!

[eager flint]

Hey can sum 1 help me with bio

[steel anvil]

does anyone know this plz, specifically (b): The solubility of aluminum fluoride is 0.559 g/100 mL H2O(l) at 25 °C.
(a) Is it possible to dissolve 3.0 g of solid in 500 mL of water at 25 °C? Show your calculations.
(b) List two methods you could use to dissolve 3.0 g of aluminum fluoride.

[cloud igloo]

yupp. what's the question

[cunning crescent]

a) is pretty simple, is 0.559 *5 more or less than 3.0?
b) is more difficult, it sounds like they're hinting at a method you mightve learned in class, lab or something similar

[thorny gyro]

can anybody help me with a problem

its really confusing

When solutions of chromium(III) chloride and silver nitrate are mixed, a precipitate forms.
(a) Give a balanced net ionic equation for this reaction

[thorny gyro]

Is it important to give GRE exam If I'm going for undergrad in Germany

[shell drum]

What do you wanna study ?

[thorny gyro]

not sure but im in STEM stream in 11th

most prolly CS or economics

or chemistry

im scared to apply cs bcoz chances goes very low

[shell drum]

I'm not well aware of the bachelor's situation , but for masters , GRE is not mandatory for most of the unis. some Universities ask for GRE scores but that also is program specific. TUM , RWTH Aachen has certain programs requiring GRE , but those are masters

for Bachelor's, I've heard some unis even accept JEE Advanced score. (If you're from India )

It's always better if you make a shortlist of the universities you want to apply to, and then go through the program eligibility criteria to see if you need to take an eligibility exam .

Btw, the language requirements are more strict than the aptitude exam requirements. But now, I think, there are more programs which is completely taught in English rather than 80-20 courses like a couple of years ago where 80 % of the syllabus was taught in English and 20% in German. These required a specific level of German language proficiency to even apply.

you can find most of the programs offered by major universities in Germany in DAAD website. You can filter the search results based on the subject, course language , fee, starting semester , and so on

daad.de if my memory serves me right

good luck

[thorny gyro]

bruh i dont even postgraduate

i just wanna do undergrad and leave this and live my fuvking life

[shell drum]

This is applicable for UG as well

[thorny gyro]

mee

[thorny gyro]

okkk

[thorny gyro]

ill learn german later

can i dm you

[shell drum]

If the program you want to applyto requires it, there's no way around it

[thorny gyro]

you know a lot of things

[shell drum]

Tbh, I've mentioned pretty much everything I know here. but sure

[thorny gyro]

thank you i still want to know more

[viscid storm]

hi any one knows the answer of this questions

[cunning crescent]

CrCl3 (aq) + 3AgNO3(aq) -> Cr(NO3)3(aq) + 3 AgCl(s)

[thorny gyro]

anyone know how to do number 3 and 4?

Hello

Any studied from Chemistry The Molecular Nature of Matter by Silberberg
Or is aware of Periodic Trends and Electron Affinity and Electron IE

Please dm me

[warm onyx]

how do i find P? Data: mA= 10kg, mB=mC=5kg. they start from v=0 and B moves 3m in 2 sec. I keep getting 7.5 or other stuff but answer says is 10. thanks!

[thorny gyro]

CH4 + 2 O2 CO2 + 2 H2O

Enter whichever is greater: the number of grams of CO2 produced by 16.0 grams of methane, or the number of grams of CO2 produced by 16.0 L of oxygen.

[cunning crescent]

Assuming that the chemical with the amount listed is the restricting factor, calculate the moles of methane and oxygen, and check if there is more than twice as many moles of oxygen than of methane

[thorny gyro]

@cunning crescent I think I did that

and based on the results I got something like 15.71 for the 16.0 L of oxygen and 43.9 for the 16 grams of methane

[cunning crescent]

That would mean that the methane produces a greater nr of grams of co2

[thorny gyro]

yeah but then it says its wrong did you get similar numbers or is it my significant figures that are off

[cunning crescent]

Give me a min to calculate

[cunning crescent]

I got similar for CH4 but not O2

[thorny gyro]

what did you get for the o2

[cunning crescent]

about 29 g of CO2

wait hold on nvm

[thorny gyro]

wait exactly, because I need in 3 sig figs other wise its wrong

[cunning crescent]

14.4

[thorny gyro]

wait but is that greater than the CH4

[cunning crescent]

no, CH4 gave 44 grams of CO2

[thorny gyro]

so do have tio write it in 3 sig figs

[cunning crescent]

just write what you got, it's probably right

[thorny gyro]

can someone help me solve this question please

[thorny gyro]

btw it's a question related to thermodynamics

[fringe dust]

hope this helps

[jade wraith]

does anyone know the formula of axial normal stress ?

[thorny gyro]

Can anyone pls help me with this problem

[tame karma]

a) Use the formula below.

b) Force = mass x acceleration.

c) p = w/t --> fs/t (use that formula)

@thorny gyro

[stoic flicker]

https://cdn.discordapp.com/attachments/716519789442367508/850372065050886194/Screenshot_505.png

Doubt

[thorny gyro]

Thanks for the help!!

[thorny gyro]

hey thanks I understood it :)

[fringe dust]

glad to hear that

[thorny gyro]

an open vessel at a temperature of 20 is heated at constant pressure to 340 what fraction of the air originally contained in the vessel has gone out

can someone guide me trough this problem

[fringe dust]

here is a tip

oh sorry the T in the last step (nR/T) should be a P

[granite condor]

hi, can someone please lend me his year 10 science notes in dm?

[thorny gyro]

Those who are studying Computer Science Engineering can add me 🙂

[thorny gyro]

can someone please turn this into a balanced chemical formula

either one of them

[thorny gyro]

ANyone?

[shell drum]

isn't it zero ?

[thorny gyro]

like how can you explain it to me?

[shell drum]

The incident ray is falling perpendicular to surface

so , angle of incidence is zero

give me five , i'll write it down

[shell drum]

Have you been taught Snell's Law ?

[shell drum]

@thorny gyro Hope it's clear

[thorny gyro]

yup

[thorny gyro]

OMG thanks mate

[shell drum]

You're welcome

[steady sable]

Idk if you've figured this out yet, but you should take a look at the Morse potential if you haven't: https://en.m.wikipedia.org/wiki/Morse_potential

It seems to me that they're asking you to figure out the dissociation energy, since you're always going to have configuration interaction terms as long as the two hydrogens are in a molecule rather than separate atoms, even if they might be more or less significant at different internuclear distances.

[acoustic dagger]

if you increase pH, do you increase H+ ?

i think it's the other way around

[cunning crescent]

"pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water. Water that has more free hydrogen ions is acidic, whereas water that has more free hydroxyl ions is basic. "

A lower pH indicates a higher level of H+ and vice versa

[acoustic dagger]

Oh okay!! Tysm :DD

[lone juniper]

Bruh is this wrong ? Like the formula says -
Change in boiling point is equal to the molal elevation constant * molality ...but in the solution they didn’t even mention the constant anywhere?

[worn pine]

Yeo. It might be wrong. They have forgotten to multiply the elevation constant. Also T has temperature units, and in that operation they got mol/kg

[ivory spade]

In which medium are these reactions being carried out?

Because in order to balance the charges we would need to add
H+ or OH- ions respectively

[sacred burrow]

Does any one have good questions of coordination compound with solutions

[rain talon]

A frictionless wooden plank is inclined at 37° with horizontal. A 70 kg block is kept on it. A rope tied
to the block's upper edge is parallel to the plank. A boy is holding the rope so that the block does not
slide down and remains stationary. Draw FBD of the block. Find the tension in the rope. Find normal
force on block by plank.

can ab help in this one pls

i need to knwo how you got the answerr

[thorny gyro]

What is the percentage of oxygen in the mixture of the ozone and oxygen when the mixture diffused through a porous plug in 172 seconds while the same volume of pure oxygen took 164 seconds to diffuse through the same plug?

can someone explain me the process

[final ruin]

Hey i do chemistry a level and if anyone has done it or is doing it please DM me

i need help finding the mark scheme to a paper

[sweet radish]

Will this be all right?

[rain talon]

yeaaa

but the normal force?

also take g as 10 we are allowed to do it

[viral sorrel]

the normal force is the one perpendicular to the plane

well, not the same but it's its reaction so it has the same magnitude

[rain talon]

whats sin of 60

like it says root of 3/2 but it gives a decimal i kinda want exact number which yall take for ur qs

how to find acceleration on frictionless inclined surface

is there a formula

[viral sorrel]

it's not an exact decimal number, it's limitless and non periodic

[ivory spade]

hi is the answer 81.25 %

[viral sorrel]

you do the sum of forces on the axis parallel to the surface

[rain talon]

so mg*sintheta?

[viral sorrel]

it's equal to ma

[ivory spade]

yes most commonly it is mg sin theta = ma but not always

[viral sorrel]

depends if there's friction or other forces involved

[ivory spade]

yes

true

[viral sorrel]

i woulnd't call it a formula

[rain talon]

so 5sin45 = 5x
35.something = 5x
so x is 7.1 around right

[ivory spade]

yes i wouldnt say you should memorize anything like that

just make the fbd

[rain talon]

so isnt the answer sin 45

i did

[ivory spade]

whats the question?

[viral sorrel]

more like
5sin45=5x
sin45=x

which is sqrt(2)/2

no idea how you get 7.1

[rain talon]

6. a = 7.1 m/s2

this is the answer

[ivory spade]

is this the question in discussion here

[rain talon]

A 5 kg block is sliding down a frictionless plank. The plank is making a 45° angle with the horizontal. Find
acceleration of the block.

this the q

[viral sorrel]

well you forgot to put g in

it's mgsintheta=ma
gsintheta=a

[rain talon]

so it is 7.1 right

[ivory spade]

bro

yes

[rain talon]

ohk tg

[viral sorrel]

it is, but not with what you've written before

[ivory spade]

g sin 45 = 5 root 2 = 5 x 1.41 = 7.05 approx = 7.1 rounding off

[acoustic dagger]

is it right to say that H20 oxidases turning to 02 at the Photosystem II in cloroplasts?

[thorny gyro]

Over here why aren't we taking the u = 0 as the ball gained the velocity of 25 m/s from 0 velocity

over here we have taken the value of u= 25

[cunning crescent]

what's the full reaction?

[stiff minnow]

It's the change in velocity that's used in the equation, i don't think you'd be able to use suvat

[acoustic dagger]

2 H20 (gives out e-) -> 02 + 4H+

[wary monolith]

ball is thrown with velocity 25 so initial velocity (u) will be 25 m/s

[shell drum]

u is the velocity at t=0 . In this case , t=0 represents the moment right when the ball is thrown up. ie, the instant when the ball leaves the hand of the person who throws it. And the velocity with which it leaves the hand of the person who throws it is 25m/s , and thus u = 25 m/s

[thorny gyro]

Thanks everyone for helping me out!!! @shell drum @wary monolith @stiff minnow

[shell drum]

Did you understand ? Or do you need further explanation ?

[thorny gyro]

Thanks but the explanation was clear

[thorny gyro]

Yup, I understood

[cunning crescent]

Ok, to say that H2O oxidises to O2 wouldn't be entirely correct. The oxygen in the water will oxidize is a more correct way to word it imo.

[acoustic dagger]

oh i see! thank you so much :))

[cyan cairn]

guys

How to understand chemistry

its my question

[tepid summit]

Just pay attention in class

[cyan cairn]

I cant

[blazing flint]

self learn if you cant pay attention in class. if you dont understand, google can help.

[thorny gyro]

answer

[thorny gyro]

Over here d=s*t formula has been used to find distance

And over here the 2nd equation of motion has been used

to find the distance

but the is correct ans is 50 m

so whats causing the ans to be wrong in the 1st solution as over there we found distance by finding the average speed and in the second solution we did by finding the acceleration

got it

[shell drum]

How did you find average speed if distance is unknown ?

[thorny gyro]

but time and speed is given

[shell drum]

uniform motion can mean uniform velocity or uniform acceleration . and it's mentioned that the velocity changes from 0 to 20 in 5 seconds. So (v-u)/t would give you the uniform acceleration

[thorny gyro]

the initial velocity is 0 and final velocity is 20

[shell drum]

you can only find distance if speed is uniform by taking direct product

the equation (v-u) * t is wrong

[thorny gyro]

so we cant take average speed ?

how do we know which equation we have to use for a specific problem

[shell drum]

No. since the velocity changes over time , no

[thorny gyro]

as there are multiple equations to find something specific variable

[thorny gyro]

Thanks alot for your help !!!! I understood why cant we use that fomula

[shell drum]

We should note down the given values , and convert them to similar units. Then write down what to find out. Then see if any of the equations of motion gives the parameter you want to find out by using the values you have.

If you still have values missing , read the question to find out cases. In this , i found out it's uniform acceleration since it's said that its uniform motion , and the time taken from u to v is given , so i could find out a

there might be other cases , like " ball is dropped" which means u=0 and a=g

[thorny gyro]

Thanks for your time and advice !!!!

Thanks alot for helping !!!

[shell drum]

Alright

good luck

[thorny gyro]

Thanks!!

[small badge]

Anyone got some circuits?

[waxen flare]

sar pls help

me

[waxen flare]

sed lyf:,

[worn pine]

I2, not sure but as I experienced in lab I2 in dicloromethane was violet and bromine was orange. In visible radiaton violet has less wavelenght. The explanation is acording to some orbitals LUMO and HOMO

[stoic flicker]

Mercury (II) Chloride solution on reaction with gaseous ammonia forms which compound ?

[ivory spade]

umm idk if this is right but

the color is exhibits is opposite of the color it absorbs

so if Cl2 is green then it absorbed Violet wavelengths (least in wavelength)

and if I2 is violet then it absorbed Green light (more in wavelength)

[stoic flicker]

But the answer is given as : Hg(NH₂)Cl.HgO and I dont understand why

I've never come across this weird complex 😅

[ivory spade]

ohh

wait

umm i took it as Mg than Hg lol

ok wait

[stoic flicker]

K

[ivory spade]

this is not a complex its a double salt