science-help

[surreal shore]

yes! or 1,4-dibromobenzene

had already solved but thanks for the response!

[thorny gyro]

Which option

Graph 3 is also in option

[thorny gyro]

3

[viral sorrel]

what does isothermal mean?

[thorny gyro]

Reason???

temp same

[viral sorrel]

yes i know

[thorny gyro]

straight is constant

[viral sorrel]

i was asking them

[wind ingot]

Temp is constant

[thorny gyro]

Understoodb

🙂

[thorny gyro]

you are physic you should not knwo

Tysm

[thorny gyro]

Dayum

[viral sorrel]

i was asking them to try to make them understand

[thorny gyro]

Ty I knew that much

Just a lil confused

@thorny gyro m solving a few more ques so pls do help may i ping u

[thorny gyro]

Fourth option both are false

Please tell me the answers

[thorny gyro]

Sorry for ping but please help here

[dim sluice]

Isothermal process is like when you melt ice at 0 degree
The temperature doesn’t change, but the volume becomes smaller or bigger

[thorny gyro]

Ok

Ty for at least a reply

[dim sluice]

Ice to water the volume becomes smaller btw

[thorny gyro]

So here the option will be ??

[thorny gyro]

...

@dim sluice

And please do ans prev 2 ques just above that

[dim sluice]

HCN I think
Cuz the other three ones are powerful acids

[thorny gyro]

I was Thinking hcn too for that one

[dim sluice]

3
Cuz I said the temperature doesn’t change

[thorny gyro]

And the other ??

One

Ty for them

@dim sluice u answering ??

@covert smelt

[thorny gyro]

This left

[north sierra]

The equilibrium constants K_{p} and K P2 for the reaction X rightleftharpoons2Y and Z=P+Q. respectively are in the ratio of 1/9 If the degree of dissociation of X and Z be equal then the ratio of total pressure at these equilibria is:

[thorny gyro]

someone good at python and want to help me ? pb me pls !! (:

[modest oracle]

#tech-related-help

[balmy nexus]

sure

[thorny gyro]

Hey Guys

I want your help

I am 17.5 and I really really want to learn math and physics in depth

due to lacking basics in some part, I struggle in some areas in science

I wanna know do math and physics like a pro, not as an A+ student because I already am one, The thing is I am passionate about science but I wanna be a scientist I dont think I have the abilities for that

WELP

Sorry for my bad English

[umbral yacht]

bruh do what your good at and also if buy some class 6 or 7 physics and work your way up there

[viral sorrel]

i'd start with calculus and linear algebra, everything starts from there

[thorny gyro]

whats the degree of freedom for monoatomic particles under high temperature? consider vibration too

[thorny gyro]

Thank you for the tip

[thorny gyro]

Thank you for the tip

[thorny gyro]

Nothing man its done

No problem!

[umbral yacht]

Thanks!

[thorny gyro]

explore things and learn practically have a desire to explore each and every things around you that might be helpful.....Imagine about how things around you happens

[thorny gyro]

bro ig its option b

1,4 - Di-Bromo Benzene ig

[thorny gyro]

Its done

[thorny gyro]

Thank you for the tip

[gloomy girder]

Hello! How can I solve such question? I was thinking the answer is d, but I'm conflicted.

[balmy nexus]

Hi. Since only static friction is given, I'm assuming that they want the maximum acceleration at the time the car starts from rest. For that you can do:

Normal reaction x static friction = mass of car x acceleration

On the left side is the force that we need to overcome to put the car in motion

[gloomy girder]

Yeah, I did that. Do you know if there will be any difference with a 2-wheel drive vs a 4-wheel drive?

[balmy nexus]

No, it shouldn't make a difference. You can try calculating frictional force on each tire and summing, or you can just calculate the overall friction force. Both would be the same.

[gloomy girder]

Alright! Thank you so much! I appreciate the help!

[lusty ginkgo]

Hi guys can any one help me solving this statistics question pls.

The average grade in the final exam in the EMT course is 72 with a standard deviation of 15 points. A lecturer claims to have developed a new teaching method that will raise the grade point average in the course. The principal of the college decided to give the lecturer 36 random students. The average grade of those students after studying in his method was 5.75. Assuming that the standard deviation will also be 15, what is your conclusion at a significance level of 5%?

[thorny gyro]

please move this to the mathematics section

[fluid thorn]

Hello, can someone please explain Hall's Voltage/Hall's probe to me? Or maybe share some link to a video or something explaining the concept.

[thorny gyro]

Anyone who can help find I1, I2 and I3

[karmic barn]

Hey guys would anybody be able to explain how to prepare 45.00 mL of a 6% (m/v) solution of MgSO4·7H2O using
solid MgSO4·7H2O and water?

[fair mason]

Arrange the following in the increasing order of pH of there solutions
KNO3(aq),CH3COONa(aq),CH3COONH4(aq),NH4Cl(aq)

Can someone give explaination and answer

[thorny gyro]

hello, pls answer that Why does pressure decrease when area decreases? in Venturimeter?? 🌹 thanks in advance

@uncut crescent if someone gives -- match it

[fair mason]

How will the following conversions be carried out:
a) Propyne to Propane-2-one
b) Benzene to p-nitro toluene.
c) But-2-yne to But-2-ene

Someone pls answer this?

[glad pulsar]

123.8

[glad pulsar]

p=f/a

isnt it inversly prop?

[thorny gyro]

ye but in venturimeter exactly opposite happens.

[glad pulsar]

hmph lemme look into it

[glad pulsar]

p1v1=p2v2 apply hoga

so if area decrease in v1 p2 will decrease or v2 wil decrease

equation is to balanced hence pr decreases with A

[thorny gyro]

thank sm sahil doubt cleared now

[glad pulsar]

cool

[thorny gyro]

@uncut crescent see this and respond 🔫

[uncut crescent]

which formula is this

[glad pulsar]

boyles law

[uncut crescent]

oh ye but how did it come here

[glad pulsar]

well she asked how pr decreses with area so i corelated it with it and it made sense

[uncut crescent]

a) addition of water
b) 1. do benzene+ ch3cl ( in presence of anhyd. alcl3)---> toluene
2. then do nitration with conc. h2so4 +conc. hno3 + heat.
since ch3 group is electron donating, the incoming group, no2, can be on ortho/ para so just put on para
and you'll get p-nitro toluene.
c) just addition of h2 with pd/pt would work

[uncut crescent]

uh okay

thanks

[glad pulsar]

c) lior na/liq nh3 will work too

[uncut crescent]

ah yes. you'll just have to see if you have cis/ trans alkene and do accordingly

[glad pulsar]

yye

[thorny gyro]

Had done that earlier still tnx

It was just a ss frm someone else

[glad pulsar]

ok

[thorny gyro]

I need some chemistry help. It will be greatly appreciated. All of q33 is kind of confusing me

[viral sorrel]

<@&717391911132069929>

[merry raven]

Thank you, he is banned.

[rocky elk]

Can someone help me in science it's about chemical reactions

[glad pulsar]

first balance the rxn , co2 will have a sotichiometric coeff =3 now moles/stoic coeff is constant for both sides of the rxn applying 7.25/1 = x(moles of co2)/3 we get x=21.75 moles and 1 mole equal to 12+32 = 44 gm for 21.75 * 44 =957

[junior dagger]

umm i need a idea from you guys
we have to make a project on any of the common things found in our homes and have to research on it regarding it's reactions, how it is made nd other things soo can someone suggest me something on which i can write a lot of info about ( i was thinking of taking paracetamol, it's a medicine but someone already made on it soo) plss suggest something

[tiny loom]

lol iza quiz

[rocky elk]

Yes it is.

[rocky elk]

Thank You! : )

[grand owl]

Is this correct?

Please help me out

[muted stump]

soap

[muted stump]

s

[fathom quarry]

hey how do you measure the instantaneous?

i mean i'm working with the oscillations of an H in a HCl molecule (physics), and i have to divideor multiply by a extremely weak amount of time

how can i choose this amount?

(i chose the planck amount of time let's see if it works)

[agile stream]

Take same amount

[idle sapphire]

derivative?

can't say i know how to measure oscillations but when i hear instantaneous i usually think of derivative

[woven pivot]

Hi guys, any pharmacy or chem student can help me organize my lab notebook? im assign to prepare a laboratory diary/notebook for my chemistry classes, and since im a first year student, and this is my first time working in this way, im kinda lost and i dont want to do this wrongly any help?

[thorny gyro]

Me I can help

[woven pivot]

Hi !! Ty

[inland wharf]

Yes correct , just substitute the value of lambda and D

[golden python]

Can anyone answer my question

??

[hallow palm]

bro specify which question because there are 8 of them

[wild bay]

Can anyone explain what the Negative thermal expansion has to do with waters state of matter???

[golden python]

1 question

[loud rivet]

can someone help me this :How much water should be filled in a container 21cm in height, so that it appears half-filled when viewed from the top of the container?
I am getting the answer as 14cms but when i check it online and almost everywhere the answer is given as 12 cms i dont really get it why is it 12cm 😔

refractive index of water is given=4/3

[woeful talon]

how will the poles change when we cut a bar magnet into half , surely it doesnt become monopole right?

[loud rivet]

bruh this is exactly my problem i checked the internet but i dont understand why they have take apparent depth as x because the question clearly states it should appear half way full then apparent depth should be 21/2=10.5

i also know how to goggle a question 🥲 but thanks neways i guess

[thorny gyro]

bruh this is a major limitation that sometimes people don't just solve doubt but copy paste what the google offer. 😂

[finite nimbus]

Hi!
Can someone please help me with question on geography test:
Which country have the bigest amount of water(internal waters)?
Thanks)

[thorny gyro]

u can just google this

[finite nimbus]

Yea, that first thing that i did
But, there is 3 countires Canada, Russia, Brazil which is on top in different sources

[thorny gyro]

is this for a test or preparation

[finite nimbus]

It's test version of exam, but i don't have options, i've to write answer

[thorny gyro]

we are not allowed to help you on a test

rule #5 of the server

i would be happy to help otherwise

[finite nimbus]

Ok, when we in school researching themes for future exams, and we got tough questions, our teachers told, that we can ask for help other people or google this, that will help us to learn more information

But thanks

[thorny gyro]

i understand but i have to follow the rules of this server to stay in the server, and that will not be the case by following any other rules. i would definitely help u in any other circumstance, i even found the answer, but i have to follow the rules. im sorry. gl with ur exam.

[finite nimbus]

Ok, thanks

[modest oracle]

Read what they said again. "test version of an exam". That's for an exam preparation, not an exam. It's totally okay

[thorny gyro]

are you sure, i really dont want to get kicked out

i just dont want to take a chance to compromise my integrity, i would love to help, if you can assure me then i have no issue

alternativley @modest oracle i could tell you and then you could do as you please with the answer

i do genuinely want to help

[thorny gyro]

You can dm answer to the person who asked

[thorny gyro]

i think its a bit late now but i should have thought of that

Hmm yes it is. Then, leave it

[modest oracle]

You won't get banned if you help them for a test 🤨

[modest oracle]

I think you're overthinking it

[thorny gyro]

maybe

[jade wraith]

hey guys, this might be a long shot but does any grad student here know how to use the Match! software for XRD data analysis?

[thorny gyro]

no but i can make a mean rogan josh

[jade wraith]

lmfao gg, fry the bhature properly too

[tall mural]

hii can anyone explain to me why the vol of brown gas formed is 25cm^3 when if compared to the mole ratio it should be 50cm^3?

[sick flame]

poop

[thorny gyro]

almost completely ionised at infinite dilution i.e.limiting molar conductivity
so i think it should be maximum conductance
but pls confirm it

[olive kelp]

Since the latent heat of fusion does not have a temperature change, where does the energy
go? Not sure what's the answer, can someone help please

[modest oracle]

Energy is not the same as temperature

So, while the temperature may remain constant during the fusion, energy may "flow in" to increase the volume of the system (because usually liquids take more space than solids)

Anyone pls correct me if I'm wrong

[thorny gyro]

Umm if someone can explain me this question, I will be very much thankful 👍

[modest oracle]

Forget about the first stone for a few seconds. I think you'll agree if I tell you that the second stone, while in free fall, accelerates. That means that, the distance between the 2nd stone and the ground decreases faster and faster as time passes, since the ground remains static and the 2nd stone accelerates towards the ground

Now, considering that, after 8 seconds, the 1st stone and the ground share the same perspective (because the question says that the stone just lies on the ground after hitting it), you might be able to find the answer

You need to find the graph where the distance between the 2nd stone and the 1st stone (or the ground) decreases faster and faster as time goes on

[thorny gyro]

Thankyou so much for providing this approach. I'll give it a try again for sure. Have a nice day ahead man :))

[amber inlet]

What's 2+2 equal to???

Please help me

[thorny gyro]

#math-help

[modest oracle]

It's equal to 1 in the modulus set N_3

Hope this helps

[loud rivet]

👍

[modest oracle]

Thanks for the nightmare

[loud rivet]

no problemo 🤠

[wintry dock]

Anyone here take neuroscience if so how is it?

[warm jewel]

I'm trying to express I_6 I_7 I_8 in relation to I_1 I_2 I_3 and I_4 But I'm stuck T.T This is what I got this far:
I_4 + I_6 = I_8 + I_1
I_7 + I_8 = I_4 + I_2
I_3 = I_7 + I_6

[graceful leaf]

Anyone have any research question suggestion's which can be abstracted from this claim? Populations of bees have been declining over the last 10 years, particularly in the United States and Europe, due to Colony Collapse Disorder or CCD.

[thorny gyro]

Question paper when teacher said its going to be easy:

[oak stratus]

Hello guys, does anyone have useful discord servers for studying physics? I am currently at 11th form and I plan to take up olympiad physics just after finishing my final exams, so I didn't have a chance to even try it before. Feel free to dm me
(I hope it's allowed to ask such kind of questions)

[thorny gyro]

Guys, I just made my first problem in fluids, who wants to let me know if I got anything wrong and try to solve it? U must know the subject pretty well tho. It's abou a tubing with a pump in a container with an Ideal fluid. Hit me in my dms

[ocean sluice]

Hello! Can anyone help me with this Chemistry problem:

It’s about conversions and stuff

[ocean sluice]

I think I have an idea. From a liquid to solid is 0°C therefore considering it’s left overnight, the liquid will go through solidification and then back to room temperature. Perhaps I have to calculate the mass of the solid considering I have Density and Volume.

But I’m not sure…kinda gibberish

[thorny gyro]

it will freeze

am i wrong?

@ocean sluice

[ocean sluice]

Yes

It will freeze

But then why is it giving the density and the the volume difference

[thorny gyro]

no clue, i think they are just saying its normal distilled water

[viral sorrel]

have you ever tried leaving a full water bottle in your freezer overnight?

[thorny gyro]

oh it expands right?

[viral sorrel]

well since the density of ice is lower than water and the mass remains the same...

the volume occupied by each is different

[thorny gyro]

so it wont expand, that makes sense ig?

[viral sorrel]

why not?

[thorny gyro]

well i assume u said i was wrong

[viral sorrel]

i didn't

[thorny gyro]

so i lied when i said it made sense

soooo @viral sorrel

[viral sorrel]

yes?

[thorny gyro]

was i right?

[viral sorrel]

you do the math d=m/V and d(ice)<d(water) and m is the same for both, is V(ice) higher or lower than V(water)?

[thorny gyro]

water

@viral sorrel

[viral sorrel]

so higher or lower?

[thorny gyro]

water is higher

[viral sorrel]

V(water) is higher?

[thorny gyro]

yes

[viral sorrel]

no

[thorny gyro]

that is what i got

[viral sorrel]

you said it yourself

it expands

[thorny gyro]

well logically

in my brain

that made sense

[viral sorrel]

logically and mathematically

[thorny gyro]

ok ok i used the wrong number lmao

ty @viral sorrel

even tho this was not my q

[unique crescent]

What is C here?

[modest oracle]

The propagation speed of the wave

[unique crescent]

Thank you 😊

[thorny gyro]

It was right, if anyone wants to discuss it or solve, dm me

[glad pulsar]

at 4 degree celcius anamolous behaviour is shown (it expands) maybe thats how u are supposed to answer

[safe zinc]

i need help with this physics problem, the first answer I tried was 15.4 i think and I don't know why it's wrong

[thorny gyro]

What method did you use to find 15.4? Following the method I found on the following website, I have y = 1.01. But I may be wrong because it's the first time I'm doing this. https://math.libretexts.org/Bookshelves/Calculus/Book%3A_Calculus_(OpenStax)/06%3A_Applications_of_Integration/6.6%3A_Moments_and_Centers_of_Mass#:~:text=We find the coordinates of,y%3DMx%2Fm

For a system S composed of several "subsystems" S_i, the center of mass G of S is given by the following formula. Considering S_i as points give you their centers of mass G_i as their locations.

For you problem, it's this equation but projected on the y axis (since x = 0).

[normal reef]

Does know what the answer is going to be with explanation plssss

[warm jewel]

Hi! I'm trying to use spherical coordinates here but I am really struggling to place the three axes. I was wondering if someone could help me? I understand where to place e_r just not the two others!

[thorny gyro]

You have to chose them once you have chosen a point in the considered space. The second vector is chosen to be orthogonal to e_r. The third to be orthogonal to the first two. We choose to orient them in the increasing direction of the angles.

[warm jewel]

Thank you!

[warm jewel]

I was wondering why we don’t use the (X) and (•) vector notation in spherical coordinates ? We draw the vectors as if they were on a 2D plane

[thorny gyro]

I'm not sure. The speed of sound is given, so we are guided to use lambda = c * T with c the speed of sound and lambda the length of the wave. The wave is created by the fork hitting the water. So the length of the wave is 83.5 - 17.1 = 66.4 cm (because of the periodicity, we know the period is over when we hear another hit). The frequency is f = 1/T = c/lambda = 340/(66.4 * 10^{-2}) = 512 Hz.

[thorny gyro]

It depends on how you are watching the situation. For instance, if you look at the situation in front of the plane (e_r, e_theta), e_phi is therefore out of this plane since it must be orthogonal to the two vectors. Thus, you can use those notations in spherical coordinates.

[sharp tendon]

Hey could anyone please help me with this osmotic pressure problem? I am confused why in the solution they did that first step to get atm. Also, what are the two densities provided in the problem referring to?

[thorny gyro]

Can some one help with number 12

[thorny gyro]

Potassium nitride is K_3N. Maybe K_3N + 3H_2O -> 3KOH + NH_3 for (A) ?

C_4H_6_O_4Sr + 2HNO_3 -> Sr(NO_3)_2 + 2CH_3COOH for (B) maybe.

[royal dagger]

Can someone send the soln pls

[thorny gyro]

I’m not sure.

I = U/R with R = 12/5 Ohm and U = 4.5 V.

[royal dagger]

Tqsm... I don't have the ans key but this seems right to me

[grand owl]

6 and 3 ohm isn't in series

It's not right

[grand owl]

So you can't just put 9 ohm there

[grand owl]

I made it simple for you. Maybe you can solve it using delta or Y transformation. Check it yourself.

You can also KVL to solve it

But you have to divide the currents in each loop. Hope you got it

[latent hedge]

hi guys i have a question about statistics

do u think using a macbook air is okay for stata or Rstudio?

[thorny gyro]

That's right, thank you, I went too fast

[ocean sluice]

Thanks

[royal dagger]

Can u send the complete solution pls? I understood the circuit simplification. Just the kvl part

[grand owl]

This should be your correct solution. If it's very important, I recommend you to verify from others. It's better not to have any doubts😄😄@Naughty Potato#5843

Um sorry the last 2 , by mistake

Lol I can't delete it.. never mind

[brittle nova]

hii!! can anyone think of similarities of the mechanics between phototrophism and the constriction of the pupil of the eye

[stable sand]

There are plant hormones working for phototrophism

[royal dagger]

Tqsm for ur time. I tried solving using the common potential method, got a WheatStone Bridge which when calculated resulted in R= 2.25
So 4.5÷2.25 is 2 A which matches with ur 'I'

[grand owl]

I tried to figure out with wheatstone bridge but couldn't rearrange it. Can you please show me how you did it

Oh I got it.. didnt give it a thorough look. One of the 6 ohms current is 0. Therefore it would make a wheatstone bridge. Thanks btw.

[royal dagger]

So is this right?

[grand owl]

Absolutely 😄

[warm jewel]

Hi! I'm trying to find the minimum velocity for m to complete a full circle when it's attached to a flexible string. My teacher's correction says that to achieve this, the tension of the string needs to be zero, but I don't understand why. Could someone kindly explain it to me ?

[lunar pebble]

i believe your professor meant tension is zero at the highest point

this is because to find min velocity,
at the highest point, only the gravitational force should be enough to provide the centripetal force

[warm jewel]

why is that ?

[low knoll]

For centripetal acc = mV^2/r

at the top most point T+Mg provides centripetal acc

since we want minimum velocity for which the mass reaches the top most point

we take T = 0

and mg= mV^2/r

[lunar pebble]

this is because at the highest point the velocity of the object is the lowest
so lets say theres some tension T
the force equation at the highest point becomes mg+T=(mV^2)/r
so for V to be minimum the only way is for T to be equal to 0
since all the other terms are constants

[low knoll]

||also unrelated but this is taught in college?||

[modest oracle]

I'm a civil engineering undergrad and yes we saw that during the first year (although it had already been taught in high school, it was a mere refresher)

[low knoll]

:o yeah that makes more sense

[lunar pebble]

was taught in high school for me

[modest oracle]

Yup

That's high school level physics

[low knoll]

same for me, high school, i was confused for a sec if our system was tougher

thanks guys

[warm jewel]

yeah i'm just bad at physics haha

[low knoll]

nuwu T-T i didnt mean it that way

[warm jewel]

thank you!

[warm jewel]

don't worry about it!

[thin shoal]

Does anyone have a pdf from chemistry: The Molecular Nature of Matter book? thank you...

[rain trail]

can someone tell me the expanded stru formula of 2,3-Dimethyl, 1- Ethyl, 4-Hexyne

thanks in advance

[lime bison]

can somebody please explain why there is a difference in the formula's to find antinode in string and in organ pipe

in string it is

(2n + 1)(lambda/4)

and in organ pipe it is

(2n - 1)(lambda/4)

why is there a difference in sign

[warm jewel]

Hi, I found it on z-lib. I don't know if it's allowed to share a link though

[sharp igloo]

https://discord.gg/4g8gkVmK

Use this server for Chegg solutions

[thin shoal]

okay thank you for the information!!

[full hatch]

Hello if people could help fill this form out for one of my science class Id appreciate it alot https://forms.gle/MiZipyt4NHHFhruA8

[stark briar]

ANYBODY in here that majored in chemical engineering?

or that saw ultimate analysis of a fuel being fed to a boiler at some point in time

[dawn lance]

If a hammer weighing 1 pound hits a nail from 3inches distance and the nail moves for about 1/10 sec. Then what’s the value of the force applied on?

1. 7 poundal
2. 40 poundal
   3)32 poundal
   4)72 poundal

Can anyone help me understand and solve this problem?? I’ve been trying to solve it for the past 30 minutes.

[stable sand]

hey guys how do i convert milliliter per gram to liter per grams

i don't understand this logic

[stark briar]

try and ignore the per grams part

how many milliliters are there in one liter

the answer is, for every one liter of whatever fluid you are talking about, theres one thousand milliliters

so 1 liter = 1000 milliliters

the "per gram" part literally just means: for every one gram of this thing theres insert amount here of milliliters

@stable sand that make sense?

[stable sand]

i did some calculations, i think I'll get better at density with practice

[stable sand]

yep thankyo

[lunar pebble]

Is the answer 40 poundal?

Wanna makes sure answer is right before sending how i did it and make a fool of myself

[dawn lance]

Yup

[lunar pebble]

Ive converted to SI units since its simpler for me
Potential energy of the hammer = mgh= 0.454x10x0.0762= 0.346 joules
Velocity of hammer as it hits the nail
0.5mv^2=0.346
V=1.234 m/s
Retardation of the hammer(a) = (1.234-0)/0.1 = 12.346 m/s^2
Force = ma = 5.605 newton
Around 40 poundal

Heres how i got it @dawn lance

[dawn lance]

Understood. Thanks a lot.

[warm jewel]

Hi, I actually had another question about this ^^' isn't the acceleration of a circular motion equal to the centripetal acc only if it is uniform ?

[lunar pebble]

Wdym by acceleration of circular motion?
In circular motion there are only 2 types of accelerations. Tangential and radial/centripetal

[tropic briar]

Anyone here knows electrochemistry numericals?

[warm jewel]

I found the answer to my question (there was no friction so it's uniform) but I was taught the acceleration in a motion circle is tangential + centripetal. But when the motion is uniform the tangential is null

[fluid lava]

Idk if you’re still looking for this
But Hopefully this is helpful, I tried to explain why I did what at the top of the page.

[thorny gyro]

Hi, can someone please explain that why avg acceleration is being considered as î & j?

[stark briar]

what you have there isnt density its specific volume. The units of Specific volume is Volume/mass, density is mass/volume

[lunar pebble]

If i understood your question correctly, you want to know why avg accelaration is equal (Vj-Vi)/T right?

[stable sand]

nope it was actually density. I had grams per milliliter value of density and i had to get mass of one liter so it was messy to convert it and get the mass...

[thorny gyro]

I understood why the acceleration is Vj-Vi/T. However my question is why that Vi was converted to 2î on the left side

[low knoll]

Can someone please explain this, I dont understand how to draw this diagram from name

are we aiming to make every carbon tertiary in a way till it becomes butyl?

[half edge]

can i ask sth about circuit analysis in here?

[lunar pebble]

Theres nothing to convert. Initial velocity is 2i

[hoary stirrup]

Is it related with computers and stuff??

If so then go here:

#tech-related-help

[half edge]

hm...nope

[hoary stirrup]

Then with what?

[half edge]

mhm...it calls "electric circuit analysis"

you will learn about circuit,how it work,use Ohm's law,Kirchhoff 1,2 ....

[viral sorrel]

go for it, someone will answer

[warm jewel]

Hi! I don't know if I should ask this in science or maths...We want to find angle beta. m*v1 = p_1 and m * v2 = p_2 , and p_1 + p_2 = p_3
I don't understand why tan beta = what we have on the second picture. I don't even see what tan Beta is here considering we don't have a right triangle at all.

[thorny gyro]

@warm jewel I’m writing theta for beta, sorry.

Then v3y/v3x = (m * p3y) / (m * p3x) = p3y / p3x. Then it’s because you have p3 = p1 + p2 so you can project this equation on the y axis and the x axis.

[half edge]

i will

[fluid lava]

Can I ask what kind of paper/notebook you’re using?

[thorny gyro]

These sheets of paper come from France. The brand is called Oxford or Clairefontaine (both make this type of paper). A lot of people use that paper in France

[warm jewel]

thank you!!

[fluid lava]

Okay, great! Thank you. I hadn’t seen that paper before

[fading mango]

All life on earth is sustained, directly or indirectly, by the power of the sun. Energy from the sun is chemically stored by plants, which is transferred to mobile life such as humans via metabolic processes. Solar energy collected over tens of thousands of years is chemically stored in the form of coal and petroleum - fossil fuels which are quickly burned and used to power much of our technology and growth. However, fossil fuels take thousands of years to build up and are currently being consumed much faster than they can be renewed, making them an unsustainable source of energy. The combustion of fossil fuel as a power source encourages a use-and-throw economy, is not recyclable and is a massive source of gases that contribute to global warming and can choke the inhabitants of large cities.

Although the energy from fossil fuels can be replaced by nuclear energy, nuclear energy is neither clean of pollutants nor as convenient as the energy stored in liquid or gaseous fuels. It is also very expensive to build and maintain nuclear power plants, making it prohibitively costly for less economically developed nations to implement at a large scale.

Therefore, the only option is for humans to find alternative sources of fuel which are renewable and sustainable - boogers. Boogers is a greatly overlooked source of hydrocarbon fuel. The average human produces upto 2 quarts (or nearly 1892.71 ml) of snot everyday, a part of which coalesces into balls of fluid mixed with dead cells, bacteria, pollen, and dirt which can be collected over long periods of time to be used as thermal fuel to power steam turbines.

However, the environmental implications of hydrocarbon combustion and the thermodynamic constraints associated with the conversion of heat into usable energy is a major problem hurdle in the application of this energy solution and green chemistry and advancements in turbine technology can help overcome these problems and achieve the dream of a booger powered future.

can anyone help me polish my thesis introduction?

[runic bay]

it wasn't converted. it's moving with a speed of 2m/s in the positive x direction. +x axis is +i. hence its +2i. hope this helps

[crimson pivot]

What happens with this reaction?

Oops I didn’t realize it would send like that, here is a better photo.

[sly ridge]

if Ca is higher than Pb, then i don’t think Pb will be able to take it out. At least thats what i remember from chemistry class

[thorny gyro]

there is no reaction as calcium is much higher than lead on the reactivity series

[thorny gyro]

Where did i go wrong in part a

the answer is 4x10-3N

oh nvm

srry srry

its a uniform field

im an idiot

although q 2 doens make sense

sorry 1 part b

the answer is 2.61x10-3

im an idiot again

[thorny gyro]

@lunar pebble

[thorny gyro]

ok ok i have a genuine question now

where am i going wrong???

is this not the method needed to solve this?

q 3 c

should have said that earlie

r

wait a second

am i meant to use

s=ut etc formula

am i a fucking idiot again???

no didnt work

k im stumped

help me

pls

i beg the

thee*

[lunar pebble]

Vi is not converted to anything
In the question it’s given initial velocity is 2m/s in the position x direction

[thorny gyro]

How do I learn my physics derivations? I have exam tomorrow

[fierce wigeon]

just practice them twice without seeing..........

[thorny gyro]

pls help

[woven pivot]

hi guys can someone from physics help me here in a question :,) im literally just researching for my own curiosity but in terms of nuclear fusion and nuclear fission, which one would be more strong in terms of released energy? my guess would be the fusion because of the hydrogen. And in the fusion, if the reaction "speeds" up if there's more pressure, how many tension would we need to make it happen? in the bombs does it work with heat or pressure?

im not in physics im actually in pharmacy, but if someone could answer this it would be pog :,) im way to scared to look for a teacher in my uni to ask it :v

[modest canopy]

ifu studied integrals in math, then
distance = the integral of v(t) from t=0 to t=deltaT (the deltaT you computed in question 3b)
and v(t) = acceleration * t

u replace a with the answer of 3a
and u replace deltaT with the answer of 3b

[thorny gyro]

i have studied it but we are not using calc in phys

[modest canopy]

well u probably saw "x = a * t² / 2" somewhere

in physics

[thorny gyro]

yes

i use that?

[modest canopy]

yea

[thorny gyro]

oh ok ok tysm!!!

[thorny gyro]

i think its A

because the formula has r^2 on the bottom

but i could be wrong

[thorny gyro]

some1 just told me it's D

whos correct

well we know the answer is a

cause d says a and b are true

now all it comes down to is finding out if b is true

lets work it out

we know F=kq1q2/r^2

is the formula

now let me think

lets just take the value for q1 as 1 and q2 at 5

and r as 6

now lets apply b and see if its correct

and k is 4pix10^-7 correct?

I think so

without b the answer is 43.6

well thx so much

now let me apply b

sorry

my calculator is like dead

it doesnt give the same answer

but check for yourself

just in case

@thorny gyro

I'm gonna check in few mins but thx a lot

I appreciate it

[thorny gyro]

all good man

[thorny gyro]

hey , do anyone know C programming ?

[lunar pebble]

yes
but ig youll find more experienced ppl in #tech-related-help

[tacit girder]

would anyone know what practical this is

[thorny gyro]

Okay thanks!

[thorny gyro]

probably calorimetry

i have a question

could it be said the magnetic flux is the density of the magnetic field in a particular area?

[tacit girder]

dw i know what it is

it is the shc pratical

[thorny gyro]

yes

[thorny gyro]

oh ok really hit the nail on the head there i guess lol

ty!

[thorny gyro]

well no shit man, it says that in the thing, you could still be using a calorimeter tho

[tacit girder]

this one

i think

[thorny gyro]

Alright, I am taking a break.

My anxiety is back yaaaaaaaaas

now kill me

[thorny gyro]

hello ppl, i need simple derivation of pressure exerted by ideal gas using Kinetic theory of gases. please help :))

Does anyone wanna study with me

[thorny gyro]

bro read what s in your textbook a 5 times, it will eventually get simple trust me

[thorny gyro]

my mind is cooked, i need derivations with simpler words

i am unable to grasp the concept :((

[thorny gyro]

did you try taking a break?

yes but skipped

some breaks

bro

try searching on yt

or just take a break and then study again

[quiet gazelle]

Tried watching vids from yt ?

[thorny gyro]

no, but just searched and found a video

[quasi storm]

Do you still want to?

I can.

[stable sand]

Which of the given laws of chemical combination is satisfied by the figure?

Avagadro's law or Gay Lussac's Law

https://d1hj4to4g9ba46.cloudfront.net/questions/1841998_f38eefb72b494816afaab449ad11217d.png

[glad pulsar]

theres no mention of change of temp or pr so we can consider v = n

hence avagardo

[stable sand]

got it

thx

[sharp tendon]

Could anyone help me with number 2? I’m not sure if I did this correctly since my answer to 2C seems off

[olive kelp]

Hey, does anyone know why carbon dioxide loses heat faster than air?

[stable sand]

How is an electron supposed to have spin when we're talking about its quantum mechanics and wave nature

[viral sorrel]

what's wrong with having a spin?

[stable sand]

i mean shouldn't that be particle nature

where as we're talking about its wave like behaviour

[viral sorrel]

it's not like the elctron stops spinning

i think you're quite confused on what "wave-like behaviour" means

[lunar pebble]

wave particle duality

[stable sand]

do you know about electron spin quantum number and quantum numbers in general

 The ms quantum number accounts for the observed interaction of electrons with an applied magnetic field; it is an additional postulate that is not part of the wavefunction

nvm got my answers

[thorny gyro]

where does the subscript of 2 comes from in Cu(NO3)2 ?

[spark hill]

Bcuz the elektron value of copper element is +2.

[worldly obsidian]

can someone explain to me why

[worldly obsidian]

also explain why

[stable sand]

this calcium cation has lost 2 electrons, that's why

[vale egret]

hi

does anyone know

how to draw this out

HOCH2CH2CH(OH)CH2OH

if u do pls could u draw it out and dm me how it would look

nvmm got it

[thorny gyro]

oh but where does the 2 here come from?

also your handwriting is very neat 🙂

[torn oar]

That 2 means the same as it was written before

it just means two NO3-

It is not written in the subscript in that case because he is showing it as an ionic species, not as part of a compound

Previously when is was part of the copper compound, it was written in the subscript to show that two of them are connected to the copper

does that make sense @thorny gyro

[stable sand]

how many electrons are possible in an carbon atom with Spin Quantum No. +1/2

[viral sorrel]

the spin doesn't have much to do with the number of electrons there can be in an atom

[stable sand]

lmao

[viral sorrel]

it's the number of protons that "dictate" how many electrons there can be

also what isotope of carbon are you talking about? is the spin referred to the nucleus or including the electrons?

also @stable sand on what book are you studying quantum mechanics?

[stable sand]

read what i asked again

https://en.m.wikipedia.org/wiki/Spin_quantum_number

an orbital has two electrons: one having negative spin and the other positive.

[viral sorrel]

which orbital? at what level? which atom are you talking about?

if it's carbon, which isotope?

[stable sand]

carbon-12

[viral sorrel]

if the spin is not an integer the number of electrons must be odd, since the number of nucleons is even

but to be fair this isn't super true as you have a lot of other factors that contribute to the total angular momentum

[stable sand]

each electron has its own set of quantum numbers

[viral sorrel]

such as magnetic momentum and the angular momentum of the electrons in respect of the nucelus

[viral sorrel]

so what

[stable sand]

You can calculate the exact number of electrons with such and such quantum number

that's my question

how many of them with positive m sub s

[viral sorrel]

can you rephrase it?

also it this a question from a texbook or are you asking out of curiosity? because what i'm getting is that you have a very faint understanding of what you're talking about.
if you wanna learn more i suggest you to study on a book:
Picasso and Sakurai-Napolitano are retty good, of course Landau is probably the best but it's quite complex

[stable sand]

i am studying chemistry in high school

here's how i calculated the electrons with the quantum number Ms +1/2

[viral sorrel]

i did chemistry very differntl then

lol

[stable sand]

not sure if you gonna understand it or if my answer's wrong

[viral sorrel]

ooooh ok

i understood a completely different thing

my bad

yes your answer is correct

again sorry, i'm studyng both particle physics and quantum mechanics rn so i've been influnced by it

[stable sand]

np mate I'll probably study quantum mechanics in physics this year too

[viral sorrel]

in high school?

[stable sand]

well here it's called higher secondary school

meaning 11-12th grades

[viral sorrel]

i see

[hot shore]

hii guys, if any of y'all are preparing for or have attempted any competitive exams please fill this form:)

https://forms.gle/W5PMfvLtA4teQcTM7

[vocal bay]

Done

[hot shore]

thanks!

[stable sand]

why thank

[stable sand]

it's Google form

[thin shoal]

guys can u help me to find EB? thank youu:)

[zenith rose]

Can anyone help me with this physics question?

[viral sorrel]

can you provide the text?

[thin shoal]

Hii, I was able to finish it. thank youu!!

[thorny gyro]

Can someone please provide a detailed calculation for this particular addition?

[cunning crescent]

Calculation of what

[thorny gyro]

does any body have negative mass ??

[thorny gyro]

Basically reaction 1 & 2 are going through addition. So i need steps of how it's done. The third reaction is the answer btw. I just need the steps

[viral sorrel]

there hasn't been any evidence of negative mass

the string theory says that the tachion should have negative mass, bt we have yet to observe that

[thorny gyro]

ohh interesting

[cunning crescent]

Ah I see. Well, I would take this with a grain of salt because complex reaction mechanisms isn't really something we went through but I assume it would be something like this. Is this homework or something?

[stable sand]

ayo any site to find scientific names' pronunciation

[urban hamlet]

Could someone verify this equation for me:
For a Compton Scattering, when provided the energy of the produced electron, I was trying to find an easy way to determine the needed wavelength photon. Does this work?:

If you set this equation to equal zero

[thorny gyro]

Hi, thank you for replying. This is not what I was looking for however, thanks a lot again!

[fierce sun]

does anyone know what Vo is referring to?

I feel like I'd have to apply KVL here but I'm not exactly sure what it is that'd help me calculate...

[bleak salmon]

Vo refers to source of voltage!

Question wants You to find out what would be the voltage between those two red dots

[modest oracle]

Vo is the voltage difference between the red dot at the "+" symbol and the red dot at the "-" one

[fierce sun]

thanks

[loud aurora]

Can somebody tell me the name of this

[thorny gyro]

sorry for late reply!!! but tysm it does make sense

also how do i calculate the number of moles for each substance?

[cunning crescent]

Balance the equation so the amount of atoms match on each side, that way you'll find the relationship between amount of moles for each compound. Then distribute the 25 moles, and multiply for each relationship.

(Sorry if my English isn't clear enough, but nr 1 step is to write out the balanced equation! I think you'll understand what to do from there :) )

[cold reef]

how to do this (physics)

[left light]

What is the difference in responses when holding your breath and diving reflex

[kindred echo]

can someone help me on this?

[viral sorrel]

find Fx and Fy, only Fx is moving the block horizontally

(and is doing the work)

[kindred echo]

The automobile in Example 6 of Chapter 6 is traveling on a
flat road. For a trip of length 250 km, what is the total work
done against air friction when traveling at 20 m/s? At 30 m/s?

Can anyone help me on this?

[thorny gyro]

if there is an electron entering a uniform magnetic field from the east, describe the pathway the electron takes giving reasons

@viral sorrel can you help me?

if its ok

[viral sorrel]

ok so is the magnitc field from east or is the electron coming from east?

if it's the latter, what's the direction of the magnetic field?

[viral sorrel]

do you know how to calculate air friction for the car?

[kindred echo]

No 😦

[viral sorrel]

ok so generally fluid friction (such as air friction) is calculated with a factor "a" multiplied by the speed of the object that is travelling through the fluid, so av, if you want the work you just have to multiply by the path, so avx

a is quite difficult to calculate so you won't really know for sure

[thorny gyro]

does not say

[viral sorrel]

ok so assuming it's directed from the paper to your face

[thorny gyro]

ok

[viral sorrel]

the lorentz force is still F=qv*B

[thorny gyro]

yes

[viral sorrel]

so use the right hand rule to understand where the direction of the force since we're doing a vector product

[thorny gyro]

so force is down

[viral sorrel]

correct

[thorny gyro]

like towards us

right?

[viral sorrel]

the thumb is B and the index is v

your middle finger is pointing down

[thorny gyro]

oh i was using slap rule

like palm rule

[viral sorrel]

yeah it's similar

so the force is pointing down

[thorny gyro]

would it not be towards us?

since magnetic field is up

[viral sorrel]

B is towards us

[thorny gyro]

like up from the page right?

[thorny gyro]

oh

my b

then yes down

makes sense

[viral sorrel]

ok but the elctron isnt slowing down

[thorny gyro]

yes

[viral sorrel]

so when it changes direction the force also does

so if for example v would be directed down

[thorny gyro]

yup

[viral sorrel]

the force would be directed to the right

[thorny gyro]

so its parabolic?

[viral sorrel]

seems like a centripetal force

[thorny gyro]

like not quite a circle

but half a circle

[viral sorrel]

it is a circle

[thorny gyro]

oh

[viral sorrel]

goes if v goes to the left

F is up

[thorny gyro]

yes

ok ok makes sense

ty

[viral sorrel]

np

[thorny gyro]

can i ask another q

[viral sorrel]

sure

[thorny gyro]

if thats ok

ok ok ty

a copper rod at a uniform speed down slopin parallel copper trails. A magnetic field acts vertically

explain why voltmeter shows deflection

the magnetic field is parallel to the vertical of the slope

if that makes sense

@viral sorrel

[viral sorrel]

can you give me a pic?

like a drawing

cuz i'm not really sure if i understood

[thorny gyro]

k

i dont get these ones

ik its faradays law

thats all

@viral sorrel

[viral sorrel]

ok so

the rails and a rod together form a circuit, think of it as a circuit travelling through a magnetic field

[thorny gyro]

ok

then?

@viral sorrel

[viral sorrel]

i'm here, don't ping me, don't worry

[thorny gyro]

oh ok ok sorry sorry my b

[viral sorrel]

faraday-neuman lenz says that the elctromotive force is inducted by the variation in time of the fluc of the magnetic field

[thorny gyro]

yep

e=∆phi/∆t

i think

[viral sorrel]

so since you are travelling through a region of magnetic field, there will be some times where it changes: where it comes in contact with it and when it goes out of the area of the magnetic field

so the flux changes

[thorny gyro]

yep

[viral sorrel]

hence you have an inducted electromotive force, so a potentiall difference measured by your voltmeter

if the slope is increased the flux will change faster

so more deflection

if B is increased nothing will change, because what's important is not the magnitued of B but how fast its flux changes

if the direction is reveresd, so will the deflection

also it's e=-N dphi(B)/dt

[thorny gyro]

oh my bad

[viral sorrel]

np

[thorny gyro]

ok that makes sense thank you so much

can i ask

[viral sorrel]

ask

[thorny gyro]

i really like this subject, how do i get depth knowledge

like you do

this is literally my favourite subject

[viral sorrel]

electromagnetism?

[thorny gyro]

just physics in general

[viral sorrel]

i studied on Focardi's book for classical mechanics and electromagnetism idk if there's an english version

[thorny gyro]

ok thank you so much

i will look into it

you have helped so much

[viral sorrel]

glad to be of help

Landau is also pretty great but it's quite omplex and not exactly beginner level

oh and for classical mechanics Goldstein for sure

amazing book

Griffith's Electrodynamics is also a good place to start, but only if you've already a decent knowledge of electromagnetism

but it probably should be okay

even thou it explains only briefly basics concepts

also Griffith is a funny guy

[thorny gyro]

ok i will look into all of these thank you so much!

[thorny gyro]

can someone please explain lenz's law to me please

i just dont seem to understand it

[viral sorrel]

sometimes wikipedia provides good explanations

what it essential means is that the electromotive force is produced as a result of a magnetic flux changing, this generates a current, which generates another magnetic field to balance out the changing flux, the sign is negative because the inducted field has opposite direction of the other one

[thorny gyro]

ahh ok ok tysm!

your so good at explaining physics, ty again!

[warm jewel]

Hi! I’m trying to express all the branch currents (I_5,6,7) in relation to I_1,2,3,4 so that I can write the equation equivalent of this circuit but I can’t do it and I’ve tried many times… could someone please help me ?

[thorny gyro]

sure send through ill try

[thorny gyro]

just look up ice table on youtube

its the same thing and it will tell u how to do it

@umbral girder

[cold reef]

how to do???

[thorny gyro]

acc ignore that they are different, go and watch organic chem tutor video on limiting reagents and bca charts on youtube

best tutorial

[drifting pollen]

Hello can anyone help me?
Topic: [biology] Movement of substance across the plasma membrane

Does anyone has a list of example substance(esp ions) with their method passing through the plasma membrane? I'm quite confused on which substance pass through the membrane by which ways.. Appreciate if you could share it with me, tqsm!

[thorny gyro]

can anyone tell me what the application of lenz's law would be

i understand that lenz's law i just have to do a question that says "discuss the consequences if the opposite of lenz's law had to hold true"

nvm

got it

i do have a question though

what would happen if the law of conservation of energy did not exist

[viral sorrel]

i mean

quite a lot

[thorny gyro]

lol i know that

but what would happen

to my understanding (which is limited to this notion) is that all of our laws would become time-invariant

but i could be wrong

and in terms of entropy in the universe how would things play ou

t

any ideas @viral sorrel

[viral sorrel]

i mean it's pretty difficult to say, i don't even know if we could establish any laws

[thorny gyro]

could a universe like that exist

?

[viral sorrel]

"what if" physics doesn't really make sense

[viral sorrel]

idk

[thorny gyro]

oh

ok well thank you

[viral sorrel]

yw i guess

don't get me wrong, it's a cool question, it's just that it doesn't really make sense to try to understand the implications because we don't actually know what will happen

[left light]

Why does heart rate decrease even more when diving (mammalian dive reflex) compared to when u are holding ur breath

[brittle nova]

what's the oxidation number of Ni in [Ni(NH3)3(H2O)3] SO4

[late mist]

+2

[thorny gyro]

oh ok ok ty!

[tight wyvern]

Hello can anyone help me?
Topic: [Chemistry] Physical Phase Diagram

how do I know which points contains a solid phase?
is it only Point A or is it points A, G, C and E?

[modest oracle]

The lines represents the intersection of phases. That means, at point E, your system contains two phases : solid and gas

[thorny gyro]

Hi, can someone please teach how to add two chemical word equations?

[late mist]

it is same as an algebraic equation.... add reactants with reactants and products with products

[thorny gyro]

Can you please give an example or a good video to refer to?

[late mist]

equations

[red summit]

join chill room need help with homework

[tight wyvern]

Hello! I'm not sure where to ask this but I need help in picking a sampling method for our research. I want to see the effects of a certain herbal tea on high blood pressure.

do i record the before BPM and the BPM after the intake of a herbal tea?

[gloomy pebble]

hey im not sure if i can help you at all , but as long as i understood bpm is to measure the blood pressure? and you want to see if herbal tea affects/doesnt affect on high blood pressure?

because if so than i would say you need to record before because you want to see if there is any change. but yeah i dont know if im a great help 😅

[tight wyvern]

hmm okay, thanks!

[left light]

Hi

[nimble turtle]

Help

Draw the free body diagram of the tilting containers D which has a mass of 2.25 t and
whose center of mass is at G. He will come with a bolt at A and articulated by a
supported hydraulic cylinder BC. Calculate the forces at A and B

I dont know what i should do i feel verry overwhelmed by this, a week ago we calculated forces in steel beams and now this... ,_,

[rocky elk]

Can someone help me with Gas Laws?

[modest oracle]

#rules #2

[fiery bay]

gauss law?

[modest oracle]

Like, the perfect gas law, pV = nRT ?

[thorny gyro]

Hi, can someone please help me understand that why do we have to differentiate the slope equation? & if slope is (2v)dv/ds then why is a = slope/2?

[late mist]

can you send the whole question

[thorny gyro]

can you explain why exactly are we differentiating?

[late mist]

purpose of differentiation is to give us the slope of any graph.... it is not compulsory you can find the slope using simple linear eqns also differentiating makes it easier(plus it can be used on a wider range of functions)

[left light]

Any news on Jamesss

[thorny gyro]

Ohhh okay! Thank you so much!

[thorny gyro]

can anyone please explain this

neither of the compounds have POS/COS so all should be optically active ryt?!

[prisma fractal]

this is harmonic motion

can anyone help me to fine the frequency pls .-.

[cunning crescent]

Hi, I am not sure what POS/COS means but as you can see 3-methyl-1-pentene has a chiral center, which makes it optically active

[thorny gyro]

Not really sure how to go about this if anyone could help out

[thorny gyro]

Still need some help?

[nimble turtle]

Yes ,_,

[thorny gyro]

Which physics class are you in? Physics 1?

[nimble turtle]

Germany, it's called Statics and Strength of Materials

state certified technician

[thorny gyro]

Oh, I'm sorry to get your hopes up. I'm only in Mechanics

[autumn panther]

please help me do part c .i am stuck

[leaden lagoon]

use conservation of angular momentum for the system {circular platform + child}

initial
mvr + I w

final
(mr^2 + I) w'

solve for w'

[supple monolith]

It is possible to use _______________________________ to identify unknown substances because almost no pure substance has exactly the same ______________________ as another.

guys i need help

its a fill in the blanks

[old fjord]

help :o

[thorny gyro]

Can someone explain this to me without calc pls

[viral sorrel]

didn't i already explained this to you?

[thorny gyro]

Yea but I’m still confused

[viral sorrel]

what confuses you?

[thorny gyro]

Why is there a deflection

@viral sorrel

[viral sorrel]

because the flux of the magnetic field changes so for Faraday Neumann Lenz there's an inducted potential difference

[thorny gyro]

ty again @viral sorrel

[tight wyvern]

Hello! quick question how do I get the equation of "Freezing Point Depression" in Non-electrolyte and Electrolyte Solutions?

[lofty surge]

Heya, some mechanics for you, my friend got this exercise for his oral exam, we need to use the conservation of energy at some points but I don't really know how, any tips ? (you can DM me if you prefer)

[viral sorrel]

can you provide at least the request or something? what is happening? what do you know and what do you want to find?

[thorny gyro]

why is the answer to this question circular motion

[leaden lagoon]

are you supposed to find time period of small oscillations ?
in that case, you can write the equation for total energy {PE + KE = const} of system {2 wheels + spring} and then differentiate wrt to time on both sides

[viral sorrel]

it's actually an helicoidal motion

[thorny gyro]

Could you please elaborate

[viral sorrel]

you have to rember the motion of a free charge in a magnetic field

and also rember the coulomb force

so lorentz and coulomb

[thorny gyro]

Im sorry but could you go into a bit more depth

[viral sorrel]

if you remember we've already discussed this, just without the electric field

[thorny gyro]

Ok ok ty

[leaden lagoon]

what class are you in btw ? @viral sorrel

[viral sorrel]

I'm an undergrad

[viral sorrel]

so it's the same thing as we discussed before but since there's also an electric field the proton is sunjected to the coulomb forc F=qE with the same direction as the electric field, so it has a circular motion but also moved by coulomb force, hence why it has an helicoidal motion

[thorny gyro]

Ok ty

[thorny gyro]

So hey I am aspiring for KVPY this year...can anyone help me by giving me some study materials or refer me some books for it?

[onyx adder]

can anyone explain me le chatelier for precipitation?

[thorny gyro]

doesnt apply i dont think as if a precipitation has been formed then the reaction has gone to completion and thus there wont be any counteracting.

if that makes sense

[thorny gyro]

for what branch specifically?

[thorny gyro]

SA

[thorny gyro]

give me a moment

[thorny gyro]

http://www.kvpy.iisc.ernet.in/main/2019-questionpapers.htm

https://www.embibe.com/exams/kvpy-previous-year-papers/

https://www.embibe.com/exams/kvpy-books/

there this should help @thorny gyro

Thanks

[thorny gyro]

all good, where are you trying to aim for

iit? or is?

iiser

[thorny gyro]

oh very good, well good luck!

Thanks

[fading plaza]

Ok so i study in morocco and im on my last year there before joining a university. Morocco is known to have hard maths and even harder physics and chemistry, even science, we study “mendel rules” which i just started understanding. But ok, so im very good at maths, im top 1~2 in my class i get minimum 17/20 without any effort, but when it comes to physics, chem, im lost, i suck at it i get around 12.5~15.5/20, especially chemistry, how do you deal with this?

[grand owl]

What we lack in chemistry is practical experiment. Watch Nilered you tube channel. It's very helpful

[keen spruce]

hi i was wondering if i can get some help figuring out the specific functions of the nucleus in neutrophils, lymphocytes and monocytes?? like what is the purpose of the multi-lobed nucleus for neutrophils etc.

[viral sorrel]

welp it really depends on what you're doing

like what are you studying in math, physics and chemistry?

what kind of problems are you resolving?

there isn't a general rule on "how to get good at physics"

the only advice i can give now is: try to understand what you are actually doing and what a formula means rather than just using the standard method you've been given

[final beacon]

guys when is central maxima at infinity in young's double slit experiment? (ydse)

[mint bridge]

When doing statistics and stuff R is denoted as uncertainty but im not sure what R^2 is suppose to signify???

[uncut sable]

hi can someone help me with the blank one

[lavish obsidian]

The thing is it could've been spores but yeast can produce spores so I'm not sure

[uncut sable]

so ur saying is spores? :0

[lavish obsidian]

But I think yeast can produce spores under stress conditions

So not quite sure Hopefully someone else helps you

[uncut sable]

🤲 okay thanks for ur help too

[lavish obsidian]

Anytime

[tiny loom]

could someone pls help me?

aren’t i supposed to know the potential and kinetic energy to do this?

waitttttt

is height the same thing as Potential Energy?

im so confused TvT

[celest gorge]

use conservation of energy, when pendulum was released from height h all the energy was potential energy (=mgh), at the bottom of the swing it gets completely converted into kinetic energy (= 1/2 * m* v^2), equating the two you can get h=v^2 / 2*g .

[tiny loom]

thanks!

kinetic energy is 1/2mv^2 tho right?

[celest gorge]

yes (1/2) * m * v^2

oh i did a mistake in my answer, i will edit it.

[tiny loom]

i get that the mass cancels out on each side and the gravity moves to the other side but where did the second 2 come from on the equating part that you wrote?

[tiny loom]

haha np

[tiny loom]

the '2' that gravity is timesed by

[celest gorge]

that 2 comes from kinetic energy term, i missed it earlier in my answer, it is corrected now.

[tiny loom]

i thought it was 1/2

oh wait

thats the same thing

XD

mb

thx

[celest gorge]

is it clear now?

[tiny loom]

yeah thx so much!

[celest gorge]

ok

[tiny loom]

i wrote it in a different way but is this correct?

@celest gorge

[celest gorge]

you missed a factor of 2.2

it was (2.2)^2 in first step, but in second step you removed one factor

so answer should be 0.242

@tiny loom

[tiny loom]

omg thanks so much! @celest gorge

[pulsar patrol]

hello everyone! i was wondering if someone could explain to me how to perform a meta-analysis type of research study? i'm having a hard time figuring it out. where do i start/what's the general methodology for it? thanks everyone!

[willow lion]

how would you know the wave is traveling towards the right. From what I see both A and D are possible solutions

[odd schooner]

i think that´s based on Huygens principle

[modest oracle]

The first displacement that point x=3cm ever experiences is a discontinuous impulse (the "wall" that occurs at t=1s) so it must be either A or D as they're the only to have that property.

To know which one it is between A and D, use the fact that you know the wave propagates at a speed of 1cm/s. The point x=3cm experiences the wave for 2s (as its displacement is non-null between t=1s and t=3s, see graph above), so that means the wave is (1cm/s)*2s = 2cm-long

[thorny gyro]

why does three phase power not cancel out

when you add the graphs they equal 0

on desmos

[thorny gyro]

the sin graphs appear to cancel out

[willow lion]

Ah I seeee

[modest oracle]

I don't know what you're talking about sry

[thorny gyro]

Yea it’s a question more for physics or electrical engineering majors

I feel they can help me more

[viral sorrel]

can you be more specific?

[hot stirrup]

On a large scale energy conservation actually does not hold, since the universe expands and is not time invariant. Time invariance and energy conservation is connected by Noether's theorem. The violation of energy conservation can be observed in the cosmological redshift.

[thorny gyro]

basically how is three phase power even possible

[thorny gyro]

im lost, how does that relate to my thing

[thorny gyro]

can someone please tell me how the frequency affects the speed of an ac synchronous motor

[stable sand]

how do you pronounce

UNNILUNIUM
UNNILBIUM
UNNILTRIUM
UNNILOCTIUM
UNNUNNILLIUM
UNUNNILLIUM
UNUNOCTIUM

[thorny gyro]

also does anyone know any good physics books to practie from

my apologies for all the questions

[cunning crescent]

They've gotten new names now so dw

[stable sand]

https://tenor.com/view/thank-you-mr-helpful-ninjago-jay-sarcastic-gif-18830225

[zenith rose]

can anyone help me with this? I have the FBD but it doesn't make sense to use 7.2 m/s cuz its not newtons

[thorny gyro]

i think

that u use the velocity to find the acceleration

but then im thinking is it due to gravity

they havent mentioned the bouyancy force

but that is easy enough to work out

although the volume of the water is not given

hmm

@zenith rose can you please show me your FBD

ok i did it but idk if its correct

my apologies if it is incorrect but if it is i am intrigued to how you would get the correct answer

or if it is correct if there is an alternate method

[zenith rose]

ok so what I got from this question is that the acceleration is 0

so i originally just thought that there would be no net force

[zenith rose]

I got no answrs srry, wish i could check as well

i also dont think its on a slide, i think its just the mass but travelling at an angle

[thorny gyro]

oh wait u might acc be right

[thorny gyro]

ye ye ik i just drew it to help me visualise

but i think the net force could be 0

[zenith rose]

lol much appreciated for the help, its just the question throws me off so much

i keep questioning like, theres no way its that ez

[thorny gyro]

yea lol i was thinking that too

but u have convinced me, the only logical answer seems to be zero net force

[zenith rose]

mkmk thanks 🙏

[brittle nova]

hi! does anyone know why does kmno4 have to be acidified during titration experiments?

[thin shoal]

can u help me guys to solve this:)

[cunning crescent]

Convert atoms to moles, using avogadros number, then divide by 2 to get how many moles of SiO2, then convert to grams using the molecular masses given.

[thin shoal]

OMGG, thank you so much!!^^

[thorny gyro]

can anyone help me??

[rich mountain]

Na2CO3 + 2NaCl ---- 2NaCl + H2O + CO2

The first one

SiCl4 +4H2O--------H2SiO4 + 4HCl

Second one

[brittle rivet]

this is the last one

im not sure about the type of reaction but i think, the first two are acid-base en the last one redox

[thin shoal]

can anyone help me??

[tiny loom]

find the amount of oxygen in grams, since there is 2 u do 2x16=32g Then convert the grams to moles using the formula: 1mole/molarmass (molar mass is the element in g)

i think thats how u do it, I could be wrong

[thin shoal]

ohhh i know, okayy. thank youu

[tiny loom]

np

[cloud sun]

can someone help me with chemistry?

its not my subject so..yea

[brittle rivet]

depends how difficult topics you have to study, but ill try anyways

[cloud sun]

its not for me

im from europe our educational system is different so i dont study chemistry etc..

i study history etc...

so here i go

[brittle rivet]

im from europe as well

[cloud sun]

n2+o2 ->n2o5

h2+c->c2h6

thats for my lil sis

[cloud sun]

man its really not in my curriculum chemistry etc...

[brittle rivet]

No2 & CH2

or NO 2NO, i dont know the question

no problem, my dm is open

[cloud sun]

its an equation

[brittle rivet]

does she already need to balance it?

[cloud sun]

i forgot to type it

im sorry

[brittle rivet]

no problem

[cloud sun]

look at it again

i edited it

[uneven fern]

@cloud sun Has she been asked to balance the equation?

[cloud sun]

its done i got the answer