science-help

[thorny gyro]

is anyone there to help me with my biology project?I am in class 12 of ISC board from India. I want to do a project on Human Genome Project. I want some help regarding what topics should I include in my project.DM me

[glossy bay]

is there any resources to learn a level physics?

[green ginkgo]

what did you do in 11th?

[mint flax]

If the energy of the ground state of a particle trapped inside a box is 0.125 eV, the energy of the third excited state will be ... eV (round off to one decimal place) help anyone

[frozen heart]

Bozeman Science has amazing videos on AP ES, as well as Jordan Dischinger Smedes

Mr. Smedes lectures go in depth and are good for understanding

[thorny gyro]

Caffeine addiction

[drowsy wraith]

1.1

[open osprey]

ur kinda late, but thanks for the info anyway. My exam was this tuesday, but thanks for confirming since I was always studying using Jordan Dischinger Smedes.

[lilac helm]

can someone help me with interpreting 2D- NMR (HSQC, HMBC). thank you :')

[faint tide]

hey guys. organic chemistry is proving impossible for me. does anyone know how to go about naming these things? any tips or advice would be appreciated thanks

[thorny gyro]

propoxypentane

[thorny gyro]

3-bromobutanoic acid

[spring remnant]

I LOVE SCIENCES

[civic nebula]

How to get better in organic chemistry?

[marsh ledge]

Learn

[cunning crescent]

I think you will have better luck if you post it

[final cloak]

Can anyone explain this?

[alpine condor]

First of all, find the function group for example, In the second part you can see one functional group named as Carboxylic Acid,(O=C-OH) start the locant count from 1 from there, 2nd thing Count the number of carbon, as you can see there are 4 carbons which means but(according to Iupac), and you can see bromine attached to the 3rd carbon. What you need to do so is name according to it, tho you need to study about it yourself: For example, If there's an carboxylic group attached, then the compound is added with the suffix noic acid. So then the name of the compound is 3-bromobutanoic acid

I have a good book about it explaining about it, i can send you the link of the site and you can learn a lot much about it from there!

[thorny gyro]

kindly dm me the site also and the book too!
Thanks in advance

[alpine condor]

I can dm you but the file size's is more than 100 mbs, i can dm you the site tho!

[faint tide]

i would very much appreciate it if you could send the site, thanks!

[faint tide]

how come you say its on the 3rd carbon atom? it looks like its on the 2nd one to me. i thought we had to count according to the side that the substituent was closer to

[alpine condor]

Functional group>substituent

[faint tide]

what do i do in situations like this where there are 2 different substituent on the same carbon

[lilac helm]

this is a long shot since the spectra is a bit complicated :')) but am desperate

[cunning crescent]

Do you have the other spectra? Or the molecular formula?

[winter mist]

For that one I think you count the longest carbon chain, which could be six, and then label the substituents based on the carbon, like 2,3-trimethylhexane. I might be wrong though, it's been a while since I've done organic.

[lilac helm]

i also have hmbc, hnmr, cosy and cnmr. the molecular formula (tentative) is C27H40O

[cunning crescent]

Damn that's a big molecule

You're trying to find the structure right?

[lilac helm]

yes thats why im kinda struggling :')

[lilac helm]

yes

[woeful talon]

in this dipole, the axis of rotation due to torque will be on the circumference of circle of centre?

[cunning crescent]

Well this is too big a molecule that I'm bothered to try and solve it, but HSQC and HMBC is all about matching the hydrogens to the carbons in a structure. HSQC is direct matching (H nr 1 is connected to C nr 1, etc), while HMBC is 2 or 3 (or even 4) bonds away. So it's kind of a puzzle matching, how can the structure look like when A is connected to 1 and B is connected to 3 and A and B are both connected to 2, etc. I would name all the peaks in your structure and then compare them to each other, and combine it with the other information you have. Remember symmetry gives equal information, all the hydrogens in a CH3 will have the same peaks. Good luck

[lilac helm]

thank you for the info will keep that in mind! do you hav any clue what to do if there's multiple H peaks bonded to C peaks (HSQC)

[vague sparrow]

as closer they get, gravity increases. With gravity growing, speed grows too.

[final cloak]

Yea I understand it now cuz PEg goes down while KE goes up

[vague sparrow]

😎

[last seal]

What are the product and reactants of glycolysis, Krebs cycle, and ETC?

[topaz imp]

For glycolysis it produces two molecules of pyruvate,
two molecules of ATP, and
two molecules of NADH.

For Krebs cycle i guess oxaloacetic acid react with CoA (coenzyme something i don't remember lol)

two molecules of carbon, three molecules of NADH, one molecule of FADH2 and one molecule of ATP or GTP are produced

I don't remember for ETC at all

Never paid attention to that

[last seal]

What? GTP ai chat is in our cells?? Cool

(Joking)

[topaz imp]

😂😂😂

Lol chat gpt wasn't a thing last year so i never thought about but it's funny lol

[last seal]

I didn’t even know about GTP until just now. Idk what that is 🤷

What in tarnation is NCERT?????

[topaz imp]

All this gtp adp and all that are equal to a certain amount of ATP just make sure you know about that as well

[topaz imp]

Ohh sorry i thought you knew about it nvm

Wait

[last seal]

?

I really don’t know what it is (no joking this time)

Lol

[topaz imp]

What book do you use?

[last seal]

Ummm kinda forgot about it…

For class we basically never use it

Mine is called the AP edition Pearson Biology Book by Campbell

[topaz imp]

Uhh i see

[brave dome]

Current Flow from X to Y

[umbral heath]

I know this but, after breaking the double bond in alkene which forms what, how do I know?

suppose

this is the alkene

and when it goes oxidation, it gives some product

i can't figure out what that product will be

would really appreciate it if someone could help me understand this

[vivid elk]

i think in this example it doesn't make a difference because your alkene is symmetrical

it has (CH3)2C on both sides of the double bond

but im not sure how you could tell if it wasnt symmetrical

[umbral heath]

Hmm

[hazy dagger]

hello there i kinda need help with 5c

During a getaway, the Joker uses a pogo stick to reach a ladder dangling from a helicopter above.

a. If the pogo stick has a spring constant of 7500N/m, and he compresses it a distance of 1m, with what acceleration will the pogo stick apply to the joker if he has a mass of 70kg?

b. If the Joker is accelerated at a uniform rate by the spring as it extends, what will be the speed that he his launched off of it with?

c. How high would the Joker reach?

[woeful talon]

here ans will be D, but why does the field inside the shell be 0? flux is zero but wont there be fields towards the centre by the charge on the ring?

[ebon dragon]

Due to mutual repulsion of charges their feilds cancel out each other in such a way that the empty space in shell becomes a felid free region.

[ebon dragon]

Hope this helps.

[woeful talon]

ahh got it, basically it cancels out in every direction, but outside the shell, there is only 1 direction of fields,

thanks

[ebon dragon]

Yup

[alpine condor]

It's simple, make the longest carbon chain, thats the first rule of IUPAC.

Something like this, sorry for the bad quality since the imagine is like this, but this will explain.

[hollow belfry]

Can it be Octane-3-one?

[ebon dragon]

thats an ether

[hollow belfry]

Oh thanks for correcting 🫡

[ebon dragon]

👍

[drifting pollen]

Who can please explain this table? Physical chemistry

Only for equilibrium constant and rate constant part

[vast dagger]

rate constant and equilibrium constants are ratios, therefore they will be unaffected by the number of particles in X amount of space (i.e pressure and concentration)

temperature changes the overall E_k of particles therefore the rate will change and equilbrium changes depending on whether a reaction is exothermic or endothermic

Catalysts lower the activation energy therefore you will have a different rate constant

however

for Equilibrium, catalysts will change the rate in both the forward and reverse direction therefore the overall ratio of products to reactants will remain the same

I hope that made sense 🙂

[twin grotto]

help

[thorny gyro]

The string is taut, thus both accelerations of A and B are the same.

P is a smooth pulley hence the tension of the string is the same on both A and B.

Second law of motion on A :

Second law of motion on B :

Therefore :

We have used that P is a smooth pulley in order to say the tension of the string is the same on both A and B.

[thorny gyro]

(P is the weight, blue y is what I wrote z)

[balmy beacon]

Does anybody know how the michael reaction mechanism on this diester looks like? I dont know what im doing...

(Its chemistry btw)

[ebon dragon]

What level is this? Undergrad?

[balmy beacon]

Yes

but we don't use levels so i don't know which level it is..

[green ginkgo]

Don't know what lampbrush chromosomes are. Diplotene bivalents I'm assuming are homologous pairs formed during the diplotene phase of meiosis 1. And don't know what Polytene chromosomes are. Also don't know if Submetacentric chromosomes are L shaped (I don't think they're L shaped by intuition)

[pure flower]

http://kns.cnki.net/kcms/detail/detail.aspx?doi=10.13386/j.issn1002-0306.2020.14.030
can anyone help me get access to this article? i cant find it on sci hub😔

[compact magnet]

guys who can explain me 2nd and 3rd law of thermodynamics in a simpler way?

[thorny gyro]

hi, how can i achieve the research articles for free? i am using scihub but i cant achieve some articles with scihub. do you know any other option?

[quartz comet]

I can suggest a video about entropy, really interesting : https://youtu.be/2QnRpinVmo4 and https://youtu.be/Sz1n0RHwLqA

Helped me grasp the concept and make the thermodynamics laws really easy to understand

[wanton hedge]

Also this ,
https://youtu.be/w2iTCm0xpDc

[vast dagger]

z-library?

Idk how viable this is but if any ppl in ur personal network belong to an institution that is subscribed to that journal then u can just ask them to get it for u in pdf/printed form

[radiant yoke]

In 41 how should I do it?

[solemn cave]

is the answer c?

use the formula E= -13.6/n^2

[radiant yoke]

What is n?

[radiant yoke]

Yes the ans is c

[solemn cave]

energy of a specific orbital taken as n

[radiant yoke]

Is it mentioned here?

[radiant yoke]

?

[solemn cave]

wym

[radiant yoke]

Is the value of n mentioned here?

I don't get it

[solemn cave]

yes , n=2 and n=3

the electron is going from high energy level to low energy level

[radiant yoke]

So i have to

[solemn cave]

that is n= 3 then it goes n=2

[radiant yoke]

Find E two times?

And then subtract it?

One for n= 2

[solemn cave]

yes but instead of that

just take the term common

[radiant yoke]

Nd another for n= 3?

[solemn cave]

-13.6

ok wait lemme show u

[radiant yoke]

Thank you

[solemn cave]

instead of doing it twice u can make ur work easy

@radiant yoke

[viscid shuttle]

Hi, can I get some help with the second question about genetic distances? I found 39.2 cM but I'm not sure...

I did ( (3+76+80+1)/(313+92) )*100 for the loci a and b
Maybe it's about dividing by 1000 (the total).

[thorny gyro]

I believe this formula is only for the hydrogen atom.

[solemn cave]

yes correct

[compact magnet]

guys i need help for my chemistry lab report

pls

[jaunty ivy]

Well ask away, people are here to help you anyway

[compact magnet]

so guys there is question in my lab template that i need to answer

our lab work was Effect of Concentration on Rate of Chemical Reaction in which equation was CaCO3 + 2HCl(aq) → CaCl2(aq) + H2O(l) + CO2(g) we gathered data and according to the data I plotted the diagram

now there is a question which i struggle in :
**Use your graphs to explain the following: I. The effect of increasing the concentration of hydrochloric acid on the reaction rate.

i can send my data and graph

but with data everything will be evident for you ig

cuz my graph is messy

we used 0.25 and 0.5 mole of HCL

second one o found

bro should i send data?

[jaunty ivy]

I don't know whether it will be helpful if not, but

1. The concentration of HCl was increased to maintain the same number of molecules on the both sides of reaction to fulfill the Law of conservation of mass(matter can neither be created nor be destroyed).
   And for the effect it will have on the reaction rate: Increase in the concentration of HCl increases the frequency of collision between HCl and CaCO3 molecules to form the products faster.

Let me think about the second one for a bit

[compact magnet]

thank you but i don't think it would help me

[jaunty ivy]

Sure, it might help

[compact magnet]

cuz we were not instructed to write about law of coonservation of mass

etc.

lemme send you my graph and data

that would help you to have clue

it is 0.25 mole

it is 0.5 mole

and that's my graph

Firstly, gloves and goggles were worn during the entire experiment to ensure the experimenter's safety. Two samples of 1.00 gr of calcium carbonate in the form of powder were weighed. The initial volume was measured and the apparatus for gas collection was set up, ensuring that all connections were securely in place. For the first experiment, 16 cm3 of 0.250 mol/dm3 HCl was carefully measured with a graduated cylinder. The 1.00 gr of calcium carbonate powder sample then was added to the acid. The bang was replaced securely, preventing any gas leakage during the reaction. Finishing with this, the clock was immediately started. The data of gas volume was collected every 5 seconds for up to 3 minutes(180 seconds) and then every 10 seconds until the reaction was completed. The same steps were repeated using 8.0 cm3 of 0.500 mol/dm3 HCl acid and results were received. Results were received, and precautions were taken to properly dispose of any chemical waste generated, following appropriate guidelines and regulations.

that is our method

i can send you questions and template of my lab work

from dm

[jaunty ivy]

Sorry bro, i don't think I can help you with that

[compact magnet]

that's ok

thank you for your attention

[jaunty ivy]

It's chemistry that much difficult in high school?

[compact magnet]

really idk how we switched to that difficulty

in Azerbaijan in this way

where are u from btw

[jaunty ivy]

I'm from India

[compact magnet]

oh ok

[jaunty ivy]

We didn't had that level of difficulty during our high school

Maybe on college level

[compact magnet]

cuz i'm having chemistry in ib diploma programme

[jaunty ivy]

Oh sounds hard
Good luck my friend

[compact magnet]

thank u

[outer dirge]

can someone please solve this question. It's from SHM in physics.

[outer dirge]

thank youuu so much!

[compact magnet]

guys

hello

[wicked igloo]

can someone who knows complexity theory explain question b

[radiant yoke]

What is the meaning of real existence?

[carmine condor]

Real existence here means actual life. Even though species is name of a category such is phylum, class and genus, species is the only category from those options that have a real existence

[light bison]

Preparing for neet

[thorny gyro]

can anyone explain me why do we use two stuffs to explain the motion of vector

like Axi^ or Byj^

in this already x and y declares that it is moving towards the the x-axis and y-axis respectively

but i^ and j^ also does the same work

shows the direction of the vector

and when teacher asked me i just told Ai^. Why is it wrong

[main needle]

Axi^ + Byj^ here might mean that the velocity in x and y direction are also changing/dependant on the coordinates of the particle that is in motion.
Let's say for example the particle is at coordinates (3,4) at some instant, then at that instant the velocity will be 3Ai^ + 4Bj^.

Have you been told that that's the way to express velocity always or was that only question specific?

[thorny gyro]

Vectors have direction and magnitude. Currently we are working in 2 dimensions, hence why there are two directional components

[nimble steeple]

Can someone help me to think of a topic for investigatory project in chemistry?

[thorny gyro]

Like we take position vector from origin

We are doing when the object is at rest

We start vector newlyyy 11th class

[main needle]

When the object is at rest the velocity vectors will be 0

[thorny gyro]

Ig

Position vector

Mutually perpendicular axis stuff🙂

[main needle]

Ok so if the velocity is depending on on position as in the example i gave above then the only instant where the velocity of the particle will be 0 is at the origin

[thorny gyro]

We are not finding velocity

The magnitude is given

Say like speed is 10 m/s moving along vector A

Type of stuff and we just need to find A^ = vector/ magnitude

Vector is hard😭😭😭😭😭

[main needle]

Oh so like you're given the magnitude of x and y velocity and you have to write it in vector form?

[main needle]

It's alright, you'll get the hang of it

[thorny gyro]

yessssssss

somewhat like it

[main needle]

Yeah then the i^ and j^ are there to denote x or y direction

I don't think the x and y are necessary then

[thorny gyro]

yesssssssssss

exactlyyyyyyyyyyyyy

[main needle]

Could it be that x and y are written like this in subsctipt to show that it's the magnitude of velocity in x direction?

Just like a way of writing nothing else

[thorny gyro]

yessss this was given

and we were suppose to find magnitude that's it

so why are we writing x and i^

if both does the same work

[main needle]

The only reason I can think of where we would write x and is has some meaning/function is the one i wrote above, otherwise i don't think it's necessary

[thorny gyro]

like these

[thorny gyro]

why we should write x if we are writing i^

[main needle]

Ohhhhhh okya

Okay*

Then here it's just written as a subscipt

Basically instead of writing Ai^+Aj^+Ak^
They wrote
Axi^ + Axj^ + Azk^

Its just to show that it's the magnitude of the vector in x y or z direction

For ease of understanding I guess

[thorny gyro]

but its not necessary to write it two times right?

[thorny gyro]

thanksssss for helping me out!!!!

[main needle]

Nono not in this case at least

[main needle]

Ofc!

[outer dirge]

can someone please explain this question?

[main needle]

I was able to prove b) and disprove c) so we know the answer is b).
I can't seem to think of a way to disprove a) rn, give me some time I'll try a little more to find it.

[queen isle]

hello im trying to figure it out, from the first equation, how can i get the intuition that it will be solved using u substitution? i get the calculation, is there any things to look, to confirm that indeed this problem will use u-subs?

[thorny gyro]

can someone help with this organic chemistry qns? thank you in advance 🙏

[main needle]

Hope this helps!

[thorny gyro]

THANK YOU ❤️

[umbral girder]

please help

[thorny gyro]

c

[umbral girder]

ty bae

[thorny gyro]

In a wire, the electrons responsible for carrying electric current move through the conductor's cross sectional area. When the wire's thickness is increased, the cross sectional area of the wire also increases. This means that there is more available space for the electrons to move through, allowing a greater number of electrons to flow through the wire at any given time. Consequently, increasing the surface area of the wire facilitates a higher flow of electrons and, therefore, increases the overall conductivity of the wire…….

[radiant yoke]

Is there any easy trick to subtract these two

I'm doing atomic structure problems and it's taking alot of time to do these.

[livid hatch]

if i have a control system with KGH = -0.11(Kp + Kd * s) and we know that the absolute value of KGH equals 1 and the angle of KGH is 180 degrees. How do i find the the required phase angle and the Kp and Kd values if the desired pole position is -9.2+4.45j

[cunning crescent]

do you not have access to a calculator?

[radiant yoke]

Nooo

It's not allowed in the exam

[thorny gyro]

Someone know a easy way to study the periodic table

?

[cunning crescent]

damn that's fucked up

[dire wing]

If it's only the elements relevant to organic chemistry you should just learn them as you use them; there aren't that many. In the case of the whole periodic table many recommend sentences, songs etc to remember it. That approach can work but it's low effort and it won't be as intuitive to think about the periodic table.
I'd recommend just trying to remember as much as you can and writing it all down often. Once you get a little comfortable you can start playing chess on the periodic table to really get good at it.
For example visualize a horse at cobalt, it can jump to technetium, osmium, platinum or silver.

[thorny gyro]

Thank you very much man

I was just sad of how much acids names i get wrong

[dire wing]

If it's just for that purpose you don't gotta learn the whole periodic table. Just take it easy and go over the often used elements/reagents regularly:)

[thorny gyro]

K 🙂

[short socket]

Hey, im an IB student and im doing my EE in physics. I'd love some help with figuring out an experiment.

I've got the research, im just really bad with thinking about an experiment

[gloomy steeple]

since it's 10^-19 you can neglect that number(whatsoever)

Can anyone help me with this?

[quartz comet]

What does your experiment have to be about

I have some experience with experimental physics

[viral sorrel]

<@&942391219206647828>

[radiant yoke]

<@&942391219206647828>

[short socket]

My idea was to do something related with bicycle. My research question is “does the speed of a bike have an impact on its stability?”. I’d like to mention rigid bodies and circular motion, so an experiment not too far off these ideas. I thought about maybe measuring the resistance a rotating wheel gives me but idk

[radiant yoke]

<@&942391219206647828>

[quartz comet]

Sounds really interesting

Are there any requisits,

[short socket]

Standard ib stuff, need independent variable, dependent and controlled

For the experiment

[thorny gyro]

He's banned guys

[vale whale]

ye but his links are still here, that's why they ping ^^ carlbot sleepin

[thorny gyro]

Yep
It will get sorted out pr soon

[cloud saffron]

all of the statements are true cause the opposite charges act as dipole, and at axial point of diople the elec field will be normal to the surface, so option a) must be true, and only at r= infinity the the elec field of diople tends to zero and since the r is not infinity then option b) is also true and if you take any point from the 2charges which is a perpendicular bisector then all the points on the equatorial line of the dipole will give you an equipotential plane which will have zero potential therefore option c) is also true, hence all of the above will be true i.e option d)

[radiant yoke]

What is difference between E =hy↓o
And E = -13.6×Z²/n²

Which energy does this two represent?

[radiant yoke]

What is the difference between wave number and no. spectral line

[vast dagger]

Can someone explain why the answer is C and NOT A? Source: A-level Biology OCR A 2020 Paper 1, Question 11

[vast dagger]

nvm i got it guys

the soda lime prevents CO2 from being used by the plant anyway for photosynthesis

being in the dark wont make a difference

[warped oasis]

can someone help me with the prenumbers i can't find them

*coefficient

nevermind found a site where it does it for you

[soft linden]

quantum superposition

[gloomy steeple]

, I heard that those who clicks on these links, their account gets hacked and tend to send the same links to the servers they are in

[solemn cave]

idiotism over the roof

that's why no click links especially for fre nitro

[marsh ledge]

Why did u click it?

[glad minnow]

Is structural formula wrong?

According to this picture, all hydroxy groups that are on top of beta d glucose are on the bottom of beta l glucose and vice versa. Does this also include the anomeric c atom? I thought beta in haworth always meant the oh group on the anomeric c atom is on top.

[gloomy steeple]

no the structural formula is not wrong

well the, 'L' isomer = reverse of 'D' isomer

[radiant yoke]

Can someone pls explain step 2. To me this is balancing redox reactions by oxidation method

I can't understand why r they multiplying 3 and 5

Please

[gloomy steeple]

wait did they teach you oxidation half reaction and reduction half reaction?

it is eaiser using the above method

[radiant yoke]

Noo

I don't know it actually

[gloomy steeple]

well search in youtube, it is a small topic(10-25 min) maybe

[radiant yoke]

But could u just tell me what's 3 nd 5

[radiant yoke]

If u know, i have an exam in1 hr, I'm just going through the theory on my own

I don't have time actually

[gloomy steeple]

just a sec

[radiant yoke]

Okay thanksss so much

[radiant yoke]

I got it 🙂

[fair hearth]

Could someone help me with this question please?

[gloomy steeple]

option C?

[jade grail]

Who got some books i can read to prepare for AP physics C?

[fair hearth]

Yeah I think it’s that omg this is giving me a headache hhaha

I’ll ask my physics teacher tmr

[gloomy steeple]

you can use kirchoffs second law

[gloomy steeple]

well I guess you're getting the answers as -100 and 500

[fair hearth]

Yeah omg 😭

Thank youu

[reef flume]

Hi!! can anyone explain the reciprocal translocation in genetics?

this is the representation for this and I confused really about the unbalanced balanced

[queen isle]

Hello can someone help me why in the last equation the right hand side is 1?

[queen isle]

book= fundamentals of wave phenomena, akira hiroshi page 149

[radiant yoke]

In heterosporous life cycle of pteridophytes, If the female gametophyte gets retained in the sporophyte(cone), then how does the microspore enter the macrosporangia to meet macrospore for fertilisation to take place?

[noble marsh]

Maybe because

For delta x and k > 0

[compact magnet]

guys how to do

I struggle in the part where W=-P * delta V

[lost thunder]

Remember the power triangle: P = V^2 /R = 64/4 so A

VI = P -> V^2/R = P

[lost thunder]

Yea np

[gloomy steeple]

I guess they are 10^3,10^8 something like this

Well if thats the case then you will get V2 = 495.5 X 10^3

[queen isle]

yeah i figure it out, delta x and k needs to be far less than 1 in order for left hand side to be way smaller than right hand side, thanks

[dreamy spade]

Imagine you are giving the balloon some energy (heat) (6.3×10^8 J). How the balloon can spend it? It can at first increase it's own internal energy (5.8×10^8 J) and also do some useful work (6.3-5.8=0.5×10^8 J=5×10^7 J). Work of inflation can be calculated like P×(Vfinal-Vinitial)=5×10^7
If P=1 atm=10^5 Pa then
(Vfinal-Vinitial)=5×10^2 m^3=5×10^5 L
If Vinitial=2.5×10^3 L then
Vfinal=502.5×10^3 L

[gloomy steeple]

ayo, did you do that conversion part? I mean units

Latm to Joules

[dreamy spade]

1 atm pressure unit approximately equals to 10^5 Pascals

if you divide J over Pa you should get meters in cube (m^3)

[gloomy steeple]

yeah they did give that 1L atm = 101.3J

[dreamy spade]

Idk what that shit mean

so I didn't use that

[gloomy steeple]

I see

[dreamy spade]

how can energy be equal to pressure

[gloomy steeple]

well its the product of pressure and volume

[dreamy spade]

oh I confused that

then everything is ok

[gloomy steeple]

yeah...

[wanton terrace]

Can someone help with these?

[dire shuttle]

just take an infinite charged sheet and take a cubical gaussian surface now the E field will be perpendicular to some of the faces of the cube and will be parallel to some you will get the answer from there

i was jus searching for my Q idk where it went

lmao

[gloomy steeple]

delta G3 = delta G2 - delta G1

for G3 use -nFln(keq)

for G2 and G1 use = -nFE

[compact magnet]

although it is late, thank you

Can someone explain the solution of this task, I don't understand the process going on this solution.

@dire shuttle@gloomy steeple

idk who are y'all, but I think you can help me

[compact magnet]

cuz this question looks harder than mine

[gloomy steeple]

Can I know the question for this solution?

[compact magnet]

the question itself is written in the left above

Basically, it asks to calculate the molar enthalpy change

[gloomy steeple]

I guess in the above question, the reaction is taking place in aqueous solution

[compact magnet]

I didn't understand how they found amount of CuSO4

[compact magnet]

yep,i think so

[gloomy steeple]

Zn is limiting reagent here

So only 1.37 grams of CuSO4 would have reacted with Zn to from ZnSO4

So only 1.37g of CuSO4 is gonna take part in the reaction

thats how we get 1.37 g and we are converting it into number of moles, since molar heat capacity is calculated per mole

[compact magnet]

why? because it is metal?

[compact magnet]

HOW TO DO THIS I NEED QUICK HELP

[ripe stirrup]

Is anyone able to identify a dipeptide through nmr (nuclear magnetic resonance)?

[gloomy steeple]

Because, the quantity of Zn is least

[gloomy steeple]

[-3,7] ?

[compact magnet]

how you got this interval tho?

cuz range of arcsin itself is [-п/2;п/2]

[thorny gyro]

can someone help me with 101st question i got as far as equating their scalar peoduct to 0 since cos90=0 i dont know how to proceed further

[gloomy steeple]

substitue -pi/2 and pi/2 in the place of arcsin(4x-1)

[gloomy steeple]

take dot product and equate em to 0

2 equations

I guess mod(a)^2 term will get cancelled

[thorny gyro]

yea after that im getting b=abcos(x) in the solution it says that vector a equal s vector b i dont get how are they equal

oh wait nvm i got it

[proper shore]

can someone explain to me what time dilation has to do with the redshift

[quartz comet]

Time dilation causes light to vibrate at a lower frequency within a gravitational field thus (dialation -> something is getting slowed down, and that is time. if you remember from waves v= λ.f
if the velocity stays the same and the frequency slows down the wavelength becomes larger so the light is shifted toward a longer wavelength—that is, toward the red

[quartz comet]

^

[proper shore]

thank youuu <3 i get it now

[kindred herald]

Hey guys, I am doing a survey for my final thesis, I am writing about eye-care infront of computer screens. Do you mind helping me out? Every single one of you helps me sooo much !! thanks a lot ❤️

https://forms.gle/zLJpkuYcE4L28GPr5

[gloomy steeple]

Figure pls

[quartz comet]

Are they faced down?

Or are they really like that?

[raw pewter]

700 by g = 9.8

[gloomy steeple]

yeah 700

[lean pendant]

can anyone pls help with this question

[digital flame]

Anyone any good at quantum physics

I need some help if possible

[stoic crystal]

I need some help with drawing linkage isomers please, I'm not sure what I'm doing wrong

[gloomy steeple]

try drawing with O as ligand in NO2(ambidentate)

[stoic crystal]

Thank you, would that just mean putting a double bond on one of the O's in No2?

[gloomy steeple]

I meant like this

[stoic crystal]

I tried doing the second one as well if that's what you mean

[gloomy steeple]

can you send me the options

[stoic crystal]

There are no options unfortunately, I drew these based off of the same isomers you linked above which I found online

[gloomy steeple]

damn both are correct tbh

[stoic crystal]

It said not to include charges, I'm not sure if that also includes the actual [ ]2- or not

Damn ok ty I thought I was just tripping 😭

[gloomy steeple]

I just realised that, I didnt read the question properly mb

[gloomy steeple]

This structure is a correct one for the question

I should develop the habit to read the questions carefully

[stoic crystal]

All good I appreciate the help

[thorny gyro]

Explain this plz...
The surjectivity part
As how it is proving for the function to not be onto function

Find differentiation of
f(x)= 9 / (x-3)

[cloud saffron]

im getting 45/6

[gloomy steeple]

🥲 cant zoom

[gloomy steeple]

well range is not equal to Co domain, So it is not onto

[gloomy steeple]

3+2√3 d/4 ??

[cloud saffron]

you can write it as 15/2;-;

hold up lemme send

[cloud saffron]

it took y=f(x) and converted it to x=g(y) and took out the domain of x=g(y), the domain of x=g(y) is equal to the range of y=f(x), and for a funtion to be onto the range of f(x) must be equal to codomain of f(x), but since the codomain is Q and the range is Q-{2} which is not equal to the codomain, hence the function is not onto

[thorny gyro]

Thanks man @cloud saffron

[cloud saffron]

😭🙏 no problem bhai

[thorny gyro]

can someone pls help me with this

[gloomy steeple]

u can solve it by using general formula for Vavg

try that if u didnt get the solution I will do it afterwards

[thorny gyro]

@cloud saffron and others
What does IR here means that is to be proved, basically what is this term "IR"

[cloud saffron]

oh, Ir means its an identity function basically, fog = gof, you need to prove that fog and gof are identity funtions

[thorny gyro]

Thnks @cloud saffron

[radiant yoke]

Can someone tell methe meaning of thsi

[gloomy steeple]

its a meme

[quartz comet]

i would cancel out the time quantity and then you could say that you experience happiness between life and death

but thats not really mathematically correct

[dire shuttle]

identity fun from R to R

[queen isle]

well, as per my understanding it depends, the left side work if and only if y is a function of x, and in the right side, y is a function of t, and there is another case where y is a function of both x and t, then the derivative will change nothing, CMIIW

[thorny gyro]

Are you a neet aspirant ?

[gloomy steeple]

Neet aspirants probably wouldn't be studying maths

[rustic dove]

BRO
FRЕЕ GIFТ DISСОRD NIТRO - https://cutt.us/takefullnitro

[thorny gyro]

No , This is basic maths before starting physics .

[gloomy steeple]

acha ok

@ornate lantern

[thorny gyro]

Your welcome : )

I didnt get you , would u try explaining again ?

[peak jungle]

hey anyone studying neuroscience?

[radiant yoke]

Can someone help me the answer of no. 12

[thorny gyro]

https://www.toppr.com/ask/question/a-crystalline-hydrated-salt-on-being-rendered-anhydrous-loses-456-of-its-weight-the-percentage/

[sterile flare]

Can someone help me with my physics

homework'

I just need clarification on one thing in the problem and i can do the rest

[thorny gyro]

whats the problem?

[quartz comet]

Of course

[sterile flare]

Thanks for the offer but I ended up figuring this out on my own

[left quail]

Can someone help me on how to find the oxidation number of metal atoms and charge on the coordination spheres when both cation and anion are complexes?
example- [Co(NH3)6][Co(ONO)6]

[gloomy steeple]

For finding the charge on the metal ions you have to be well aware of the charges of the ligands

[left quail]

I know that NH3 has 0 and ONO also has -1 but how can I find oxidation no. of metal atom if I dont know charge on complex?
Is it that Co will have same oxidation state in both cationic and anionic complex?

I did identify the metal atom Co but I still don't get how to find its oxidation no., cause it can show variable oxidation nos. for same coordination no.
Would you please mind explaining a bit more.

[wind musk]

is chatgpt accurste on chemistry@gloomy steeple

[wraith basin]

what i know is that you have to look at the charge of the whole compelx, so if the compelx is uncharged you have to take the oxidation number of the metal that makes everything add up to 0.
i don't really get your examples tho, are they from your teacher? or where did you get them

[gloomy steeple]

you mean accurate?

I never tried GPT for education purposes though xD

I don't recommend using Chat GPT though it still has some errors

[gloomy steeple]

There is a method though

Since NH3 is a neutral ligand the coordination sphere of that complex will be positive and other will be negative

aah le me draw it

@left quail These type of questions will have options

Since you cant exactly tell the oxidation numbers

take one metal ion charge as x and other as y

you will get relation between x and y

and see which option matches the best

💀 Never encountered these type of questions in my last two years though

[left quail]

Thank You so much for answering, I figured it out though.Yes the example is a class illustration from my teacher.

[left quail]

Thanks you so much for clarification, I understood it already though.

[wraith basin]

aaww no problem~ happy you got it

[wind musk]

india?

[light bison]

12th?

[thorny gyro]

Send the answer...and solutions too if you wish

[gloomy steeple]

yeah

[hazy matrix]

why does the velocity of the train after a collision with a stationarry carriage cause the train to ahve lesser velocity after the collision?(4 marks)The train collision causes the energy to become conserved meaning that the stationary carriage and the train force will move in the same direction due to th collision.As a result they will have the sa,me velocity.How many marks would i get for this?
also by my answer u can tell im not good at physics

[gloomy steeple]

maybe 2-3 marks

[hazy matrix]

yup i relaised bc i didnt add the conservation of momentum and saying that the train transferrred momentum to the carriage therefore decreasing the speed of the train

[gloomy steeple]

yeah and writing formula and all gives you extra marks

[hazy matrix]

yup

[thorny gyro]

https://www.toppr.com/ask/question/upon-spotting-an-insect-on-a-twig-overhanging-water-an-archerfish-squirts-water-drops-at/ can someone help with this physics problem? idk how the first equations work

[olive sable]

Guys i have an issue. I am very good in physics. I can solve hard problems and exercises but i seem to always lose points of my mark in multiple choices and true or false questions that are related to the theory. I read the theory and i understand it but idk why i make theory mistakes. Any tips? Maybe i don't read the theory in depth? What should i do to grasp the meaning of the physics theory better (theory except formulas)?

[quartz comet]

Imagination

When i read a theoretical problem, i imagine it in my head, i write down what might be usefull and solve it

A bit compact, i know, but that ps just really it for me

[olive sable]

Oh woah i see. I've never thought about it that way. Thank you for your recommendation

[quartz comet]

got you

[silver sorrel]

BRO
FRЕЕ GIFТ DISСОRD NIТRO - https://u.to/0E67Hw

[mystic tide]

seeing these kind of problems for the first time, and google doesn't understand what i mean when i search them up:(
how can i solve this??

[odd folio]

when do I need to use the Rt = (R1 * R2 / R1 + R2)?

[raw pewter]

Just for 2 resistors in parallel

[raw pewter]

I thnk it’ll be th same 770

[mystic tide]

theres no answer sheet idk man ToT

[raw pewter]

Idk if u know th exons n introns

[mystic tide]

nope

[odd folio]

why is Rt = 60?
Rt = R1 + R3 + (R2 * R4/R2 + R4) + R5
?

[raw pewter]

R3 + R4 = 20

(1/20 + 1/60)^-1 = 15

15 + 20 + 25 = 60

[odd folio]

Vt = 120
It = 2
Rt = 60

V1 = 50 I1 = 2 R1 = 25
V2 = I2 = R2 = 60
V3 = I3 = R3 = 5
V4 = I4 = R4 = 15
V5 = 40 I5 = 2 R5 = 20

[odd folio]

is V2 and V3 both 30V?

[raw pewter]

V2 = 30
V3 = 7.5
V4 = 22.5

[odd folio]

then the current for I3 and I4 is 1.5 because it's a series

[raw pewter]

Yup

[odd folio]

Vt = 12
It = 2.4
Rt = 5

V1 = 12 I1 = 1.2 R1 = 10
V2 = 3.6 I2 = 1.2 R2 = 3
V3 = 6 I3 = 1.2 R3 = 5
V4 = 2.4 I4 = 1.2 R4 = 2

the current is 1.2 for the series? which if you add the current its equal to 2.4?

[odd folio]

Vt = 100
It =
Rt =

V1 = I1 = R1 =
V2 = I2 = R2 =
V3 = I3 = R3 =
V4 = I4 = R4 =
V5 = I5 = R5 =

I was told to add R3 + R4 + R5 then get the RT,
but R345 are parallel, is using (1/R4 + 1/R3+R5) wrong?

[past dew]

anyone good with physical chemistry calculation

[winter saffron]

when does one use the law of faraday and the general law of electromagnetic induction? They're so similar apart from the minus sign in the general law.
Image

we learnt that without the minus sign it's faraday's law

[quartz comet]

It has to do with the direction

Its normally a vector

The direction of the flux is the oppisite of the induction

Thats why the minus is there

[odd folio]

Vt = 20
It =
Rt =

V1 = I1 = R1 = 4
V2 = I2 = R2 = 4
V3 = I3 = R3 = 8
V4 = I4 = R4 = 10
V5 = I5 = R5 = 4
V6 = I6 = R6 = 2
V7 = I7 = R7 = 2

is the Rt = 10 Ohms?
is V2 = 10 and I2 = 1?

[thin shoal]

Hi guyss, can anyone help me with this?

[thick ore]

What is the voltage at G?

[gloomy steeple]

8 V ?

[thick ore]

it was yeah

[gloomy steeple]

just take resultant resistance of the circuit

and find current

for voltage across 4ohm multiply it with the resultant current

[odd folio]

Isn't the voltage at G, 4 volts?
because the if the Current is 2, then the Voltage at the 4.0 resistor is 8 volts, then resistor 6.0 and 3.0 is 4 volts because it's parallel?

[gloomy steeple]

the potential at G will be 8 volts

pd across 4ohm is 8 volt

they given that below the 4 ohm resistor the voltage is 0v

so at G it will be 8 V

[thick ore]

anyone know how to do this? I've been stuck for a few days

[wind musk]

b = 0.5?

[gloomy steeple]

just substitue L in the place of lambda

[thick ore]

Do you know what a would be?

[gloomy steeple]

any constant

I mean remaining part except root L

[thorny gyro]

Does anyone know what’s the Fourier transform (the frequency spectrum) of a Dirac comb?

[fast fable]

a dirac comb

[lime girder]

which are true about phsyics and phsycal info;
1 To reach phsycal info we should care about historical scientific achievements
2 Phsyic is pratical science
answer is 1 and 2 but how is 1 is true? I dont have to know what Newton said about macro-phsyic isnt it? I just have to know current knowledge.

[weak prawn]

am i stupid or this question is wrong??? what is ALPHA 1 and ALPHA 2

[autumn shuttle]

question is wrong bacha
you are correct 😊

[weak prawn]

thanks PALAKH SIR 💀

( its the PW module ....get it checked)

[autumn shuttle]

sorry but I teach at BW not PW 😇

[weak prawn]

and that is??

baccho wala???

[autumn shuttle]

bitches wallah

I have the best faculty and experiences to score high number of bitches per year
last year a student scored 670+ bitches out off 720

[weak prawn]

💀

[queen dirge]

Hey question is the image formed on water upside down?

[autumn shuttle]

no
it forms images just like a mirror, laterally inverted

[grave urchin]

I assume alphas are the volume fractions ?

[queen dirge]

Everyone be advised please try to ignore this it is a scam as you will click it it will take on your person information be aware of your surroundings please confirm before clicking on the link. I'm just a random who came by to know that this is a scam, just spreading the word around.

[lime summit]

how do we ban this person? he is spamming accross all chats

[final acorn]

nic

[charred glen]

Need help on the triangle question

Looked everywhere on the internet. Couldn't find anything related to it

[quartz comet]

Draw lines from every point to p

This helps to

[broken plaza]

Can anyone help me with this Stoichiometry question? I'm confused on what to find here and how :/

1L of NaCl of 1M is mixed with 0.5 of 2M CaCl2, find the [Cl-]

[placid jay]

can someone help me with figuring out what exactly cosmic background radiation is? if so please ping me ^^

[charred glen]

thanks a lot dude.helped me a lot

[verbal badger]

nice site, what's the name of it?

[thick ore]

Isaac physics

[verbal badger]

thanks

[thorny gyro]

bro can i just have a friend that’s rlly good at science

bc it’s literally fucking me up rn

[gloomy steeple]

I can help you if its high school level

[sullen pier]

DOES ANYONE KNOW

THE DERIVATION FOR THE MAGNETIC FIELD FORMULAE

AAAA

something about the biot savart law

nvm that

whyyy is the magnitude of the magnetic force proportional to |vsin(theta)|

nvm

[solid walrus]

Could you pls help me?

[subtle river]

If there is someone studying molecular biology and genetics, can they write to me?

[past bay]

anyone know how to discover the symmetry of crystal lattice system using invarian method ?

[crystal hare]

"4 protons are arranged in a square shape with length l=510e-9 m in a plane. Find the mininal velocity a 5th proton at a distance d from the center needs to have in order to reach the center of the square. Calculate that velocity for d=510e-9 m"
So I've been stuck on this exercise. My idea was to calculate the potential energy at the center and make it equal to the kinetical energy of the 5th proton and thus find the velocity. My problem is, that my potential energy in the center is in relation with l, but not with d.
Thanks in advance :)

[uncut sable]

-Identify the lattice structure of the crystal.
-Look for symmetry elements like mirror planes, rotation axes, and inversion centers within the lattice.
-Analyze the arrangement of atoms or ions in the crystal.
-Apply symmetry operations to the atomic positions and observe the resulting patterns.
-Compare the observed patterns with expected patterns based on known crystallographic point groups.
-Deduce the likely crystallographic point group that represents the symmetry of the crystal lattice system.

[dire shuttle]

It has 3 aplha hydrogen and according an expression i read
No. of reasonating structures = number of alpha-H + 1
so reasonating structures must be 4
i know two of them i might know two more but im not sure can anyone help me with more resonating structures(This is from solomons fryhle , they saying there are 10-11 reasonating structures i cant even tell 4 bro)

is it related to something like changing electron densities

[thorny gyro]

<@&942391219206647828>

[thorny gyro]

Banned thanks

[thorny gyro]

did u take hyperconjugating structure + resonance structure too?

[dreamy spade]

We have two bodies in thermal contact, graph of first body's temperature and partially the graph of the second body. How can I find the final temperature of the system in thermodynamic equilibrium?
It's school problem that must not require derivatives and exponents. When I tried to use them I got wrong answer, while the correct one must be 56°C approximately

thank you in advance

Y axis represents temperature in Celsius and X axis represents time in minutes

[thorny gyro]

Prob: Sciencehelp more likely to be Electric help

Given is the following circuit. The current I3 should be calculated in two different ways.

a) First, calculate the voltage U3 using the voltage divider rule. Then calculate I3 using R3.
b) Calculate the current I1 using the total resistance. Then calculate I3 using the current divider rule.

In the solutions, the result for I3 is stated as 0.83A, but I can't seem to obtain the same result no matter how hard I try. Can someone help me? Thanks in advance.

[lethal axle]

Yo I need help

Tell me how to a model

For the magnetic field of earth

[thorny gyro]

First calculate the equivalent resistance of the entire circuit, then find the current I1 using it. This same current I1 is going to be divided among the two resistors R2 and R3 in the ratio 1:4 since the resistances are in the ratio 4:1. Calculate it and you will get your answer

I3 = (I1/5)*4

Which is 0.827A

[thorny gyro]

But you already have numerical values for d and l. What is the issue?

[thorny gyro]

"Lower aliphatic amines can form hydrogen bonds with water molecules hence they are soluble in water. An increase in the size of the hydrophobic alkyl part increases the molar mass of amines which results in a decrease in its solubility in water. Higher amines are insoluble in water."
Would appreciate someone to explain this in simpler terms (dont understand meaning of 'lower aliphatic', 'hydrophobic alkyl', general idea of why teritary amines are soluble in water i think?)

[uncut sable]

Lower aliphatic amines are small-sized amines that can form hydrogen bonds with water, making them soluble in water.
Amines with larger alkyl parts (hydrophobic alkyl) become less soluble in water as the alkyl part gets bigger.
Higher amines, with larger alkyl chains, are insoluble in water because they cannot form strong hydrogen bonds with water molecules.
In summary, small amines dissolve in water due to their ability to form hydrogen bonds, while larger amines with bigger alkyl chains are less soluble or insoluble in water.

[thorny gyro]

Does small-sized/lower aliphatic amines necessarily mean primary and secondary amines while large-sized/higher aliphatic amines mean tertiary amines? and would u say tertiary amines are 'not soluble in water' or 'soluble in water but not as soluble as primary/secondary'? Or i am still interpreting everything wrongly or do I even need to look at amines in terms of primary/secondary/tertiary

[uncut sable]

yeah. Ur on the right track
Lower aliphatic amines typically refer to primary and secondary amines, which have smaller alkyl groups attached to the nitrogen atom.
Higher aliphatic amines generally refer to tertiary amines, which have larger alkyl groups attached to the nitrogen atom.

Regarding solubility in water:
Primary and secondary amines (lower aliphatic) are generally considered soluble in water due to their ability to form hydrogen bonds with water molecules. They can mix well with water.
Tertiary amines (higher aliphatic) can also form hydrogen bonds with water but to a lesser extent than primary and secondary amines. As a result, tertiary amines are less soluble in water compared to primary and secondary amines.

So, to summarize:
Primary and secondary amines (lower aliphatic) are soluble in water due to their strong ability to form hydrogen bonds with water molecules.
Tertiary amines (higher aliphatic) are also somewhat soluble in water, but their solubility is lower than that of primary and secondary amines.

[thorny gyro]

Tysm this helps alot

[brisk root]

Do y'all have any recommendations on testing how well we can apply the information we know? I'm able to go through and study to make sure I'm studying for discreet facts/information, but I'm struggling to test/challenge myself since I've never tried studying that way before

[glossy portal]

You just have to do practice questions, most of the time the discreet facts will be in the mark schemes, don't overcomplicate it. Anyway, those discreet facts are rarely worth many marks in the majority of cases, you just have to revise the bulk of the content and then eventually when you're practicing questions you'll come across extra information you didn't know within those mark schemes, so make sure you pay attention what you could've done to improve answers, don't let ego get in the way EVEN if you think you're revising an easy topic.

[uncut sable]

u can try to look for practice exams specifically designed for the certification or topic you're studying(this is what i do)
or
do online quizzes. Numerous websites offer online quizzes and interactive assessments for various subjects. Look for platforms that provide quizzes related to the topics you're studying (this is what i do too)
or
teach soomeone else, it helps solidify your understanding and forces you to articulate your knowledge in a coherent manner. or just teach to the air like i do LMAO

[dire shuttle]

uh no

but does hyperconjugating structure counts in resonating

[dire shuttle]

idk what is voltage divider rule you trying to say but finding the voltage U3(which i think the question says the voltage across R2 and R3 system
so just simply find the equivalent resistance of the whole circuit
and divide the voltage Uq by R eq
you will get the current
then once you have the current you know current is same in series so just multiply R eq(2) (parallel system of R2 and R3)

with the current

cuz you know V = IR

I1 you alredy calculated in the first question

I3 you can again find it using the first question

I = V/R (here V will be U1 and R will be R3)

btw i think i know the current divider rule but i guess it wont be that much useful here cuz i dont really remember formulas just solve using 2-3 equations rest use brain lmao

use derived formulas when really necessary

[ashen sparrow]

So I'm starting to study sports science, but i don't really know much about biology. Should I study biology before i learn about sports science???

[thorny gyro]

HIII need help asap

i dont understand why

i and ii have the e flow in different ways

[thorny gyro]

negative hyperconjugating

[gloomy steeple]

<@&942391219206647828>

[thorny gyro]

Banned thabks

[marsh night]

A little help would be great 🙂

[dire shuttle]

you mean reverse hyperconjugation?(the one with halogens)

[dire shuttle]

cuz the polarity of battery is changed

and in both cases if u use right hand thumb rule the field will be same

[tough coral]

does anyone know how to calculate acceleration given only these values?

actually we have these two

it's for a lab but we dont have the equipment to redo it

it screenshotted weird it's supposed to look like this

[thorny gyro]

Yes and sometimes with alkyl groups too

[thorny gyro]

Tysm 🤍

Do you use notes or sumth to help study

[ashen sparrow]

Does anyone here use anki?

[glossy portal]

yh what about it

[ashen sparrow]

is it good?

[glossy portal]

@ashen sparrow What subjects do you do

[cold basin]

does anoyone know where can I download pdf file of books for free?
I need it for VK Jaiswal tomorrow and I dont have time to go but it .....

pls @ me

[foggy trench]

hi need help pls, actually don't know how to solve that
№801.
Oil in the warehouse is in a tank in the form of a cylinder 8 m high. At a temperature of -5 ° C, the oil level does not reach the upper edge of the tank by 20 cm. Will the oil spill out at temperatures up to 30 ° C?

[potent fossil]

i really messed up my chem
i am studying for jee

could someone point me to a resourse online or in book form to compleate all of organic them theory

i have done goc

need help hydrocarbons
alkyl halides
alochols
and ketones ]
anyone please

[potent fossil]

its the best for memorizing anything

you dont need to delve too deep into the extentions

the defalut aap alone is perfect for most stuff

[ashen sparrow]

Sports science

[glossy portal]

yh in that case it would be extremely useful, try using the snipping tool, essentially you can copy the pictures onto the flashcards, for example, this would be extremely useful for questions on anatomy because you'd have the information as well as the reference. Obviously its good for memorisation of definitions but I would still favour practice questions, I had to know what subject you're doing because if its physics there's a lot of math involved which anki is basically useless for, and I don't know too much about sport science and its relation to math but if you have any mathematical topics within your module I would advise you to just do practice questions and not use anki at all. There are a lot of add ons for anki which are essential for organisation, I can't think of any from the top of my head, but watch videos on them because anki very customizable. You can also download other people's flash cards from the website if you don't want to make you're own ones, but yh thats basically it.

[ashen sparrow]

Thank you!

[glossy portal]

cool hope it helped bro

[ashen sparrow]

Did mate cheers

[uncut sable]

try http://www.masterorganicchemistry.com/
it offers a lots of resources and tutorials on organic chemistry topics. They have articles, practice problems, and study guides specifically focused on hydrocarbons, alkyl halides, alcohols, and ketones, which can be helpful in understanding the concepts.

[thorny gyro]

1. “Long chain organic macromolecules made up of small repeating units”
2. “Materials composed of long-chained molecules or macromolecules”
3. “Macromolecules formed by the chemical bonding of large numbers of small molecules called monomers”

Hi I’m not sure which is the best in defining polymers (all derived from lecture notes) or if I could also combine bits of info from them and into a new definition(?)

[ebon dragon]

i think 2. is not accurate as macromolecules themselves are long chained molecules, not composed of them.

3. is actually the defination of "monomers"

1. is the correct definition. you can modify it like: " macromoles(polymers) are long chain organic compounds made up of small repeating units called monomers. "

[ebon dragon]

I hope this helps.

[thorny gyro]

Tysm 🙏

[ashen sparrow]

Does anyone know a good anki template for studying biology?

[thorny gyro]

Actually if you say “small repeating units are called monomers”, for mers do i also say they are repeating units?

[ebon dragon]

yup monomers are repeating units in polymers.

[tardy turret]

Hey is there anyone that currently is studying (University or higher) anything related to microbiology, molecular biology, or bio chemistry. I am doing a project that requires some knowledge in that area and would appreciate any reach out 🙂

[jagged flicker]

Im doing cell biology right now, and I finished biochem. Im in my 3rd year biology undergrad @tardy turret

[gloomy steeple]

c?

[thorny gyro]

that’s what i got

[steep pivot]

Does anyone here have any notes on elementry biomedical diagnostics and therapeutics?

[gloomy steeple]

Is it wrong or do you need an explanation?

[ornate ridge]

Hi who can show me solution for code storage for pc

like calculate python code to how many bytes or bites

[gloomy steeple]

#tech-related-help

[thorny gyro]

idk if it’s right or wrong 💀

[gloomy steeple]

its right though

[thorny gyro]

thank you

[ebon dragon]

<@&942391219206647828>

[thorny gyro]

can anyone help me with this que, idkw why did we multiple 76 with 13.6*g. Because its already a pressure in cm of Hg so why are we finding the pressure again with the formula P = p g h

at the top its Patm = 76 cm of Hg

[honest token]

idk if this is the right channel for this, but I can take either General Chemistry or Biology 1. I have to get an A in one of them to meet the requirements to get into the program I want to transfer. Is it easier to ace Gen Chem or Bio 1?

[thorny gyro]

It really depends on the understanding level of your with either of these subjects

[gloomy steeple]

you will get the maximum wavelength when the electron goes from n to n+1 level

[gloomy steeple]

there is an easier way to do this type of questions

take every liquid as mercury (assumption) and calculate the heights of the mercury assumed

[gloomy steeple]

I guess thats what they did converting every liquid into the terms of mercury

[gloomy steeple]

Well If you just want to find it in atm, then no need to convert it

[fair hearth]

This is a worked example.. just wondering why do you multiply it by 5?

[uncut belfry]

when u multiply 5 by 2000 mg it gives 10 raise to the power 4 and when u multiply 200ml by 5 it gives 1 L. its a way of saying that if we take 200ml there will be 2000 mg and if we take 1 L there will be 10000 mg

[thorny gyro]

Can anyone help me with [Ag(CN)2]2+ diagram like in the picture

[viscid goblet]

physics question: A stunt motorcyclist attempts to jump a river which is 5.1m wide. The bank from which he will take-off is 2m higher than the bank on which he will land, Calculate the minimum horizontal speed he must achieve before take-off to avoid landing in the river.

[gloomy steeple]

caculate the time to reach the ground from the higher bank

then you can use that time to find the velocity (distance is given)

[gloomy steeple]

Well, you can use differentiation method for this problem

[broken plaza]

Class 11, kinematics

[gloomy steeple]

find the velocity in y axis after 2 sec

since along x axis the speed is constant

take the mod of speed in x-axis and y-axis (like in vector form mod)

[broken plaza]

I'm sorry how do i do that

what I did was I integrated acc which gave me velocity and then I calculated the magnitude of velocity. So i got root 40

[uncut belfry]

its answer is not root 40?

mine is root 40 too

[broken plaza]

ye that's exactly what I did

[broken plaza]

nah I think it is

[uncut belfry]

yeah it must be, u did it right

[lean pendant]

hey guys, need some help with one thing

There's this chemistry chapter in which the equations have cube roots so does anyone know some good trick or technique to find the answer to the cube root fast? The cube root type of questions repeat alot so thought I'd ask

[gloomy steeple]

Ahh, I just know cubes upto like 12, so I estimate the values depending on it

[tough coral]

how do you calculate the theoretical uncertainty of a ring?

[torn oar]

if you send an example, I think that would help others answer your question : ) Otherwise, Im not sure how to help.

[eager atlas]

could anyone help me figure out the mechanism for this step of the synthesis pathway?

[wet hearth]

should be similar to this

[eager atlas]

thing is i don’t think there are any h+ ions present for that to happen

i imagine the lone pair on the nitrogen attacks the carbonyl carbon though? i have absolutely no clue where to go from there

[wet hearth]

Yes, I guess followed by the cleavage of water and this step is repeated with the second carbonyl and the other part of the hydrazine leading to the heterocycle

[eager atlas]

i can’t really figure out what happens next

and if that is even correct

[wet hearth]

This would be my attempt

[eager atlas]

thanks a lot (:

[marble summit]

This message for discovery website of education can share any website for learning you use

[uncut sable]

-Coursera Offers courses from top universities and institutions on a wide range of subjects.
-edX provides free online courses from universities like Harvard, MIT, and more.
-Khan Academy offers free educational resources and courses for various subjects.
-Udemy provides a wide range of courses, often with frequent sales and discounts.
-LinkedIn Learning offers courses on professional and technical skills.
-Codecademy specializes in coding and programming courses.
-MIT OpenCourseWare provides free course materials from MIT.
or just go on yt, theres many educational channels covering various topics.

[marble summit]

Thank so much

[broken plaza]

ay someone pin this bro damn

[radiant yoke]

What is the meaning of electronegativity more negative and less negative? Does electronegativity less negative means more electronegative an element is?

[ashen roost]

Electronegativity is never negative

I think you're confusing it with electron gain enthalpy

Electronegativity is a relative term

It only depends on nuclear charge

The more is the nuclear charge the more is electronegativity

Whereas electron gain enthalpy is -ve +ve or 0

If electron gain enthalpy os less negative it means that element cannot easily gain electron and it would therefore mean it is less electronegative

Is it 2,3 epoxy ethane 1,2 dicarboxyllic acid

[thorny gyro]

it's 3,4-epoxy hexane-dioic acid

the main chain (or principle chain) is 6 carbons long. it starts from the "C" in the carboxylic acid unit in left and ends at the "C" in the other carboxylic acid unit in right

[sweet rampart]

This is pretty simple but it's 3am and my brain farting

[radiant yoke]

Oh yes you're correct, I got it now.

[ashen roost]

Ok

[drifting herald]

Hi everyone, I just finished an experiment (due on thursday oops) on how different colours transmit heat. My results largely prove that colours of longer wavelengths transmit less heat that than of shorter wavelengths. The experiment is a little bit scuffed but the results seem to be consistent. Is there any explanation for this?

I am currently on the notion that since the heat source emits radiation in the infrared spectrum (its a light bulb), red coloured objects would reflect more red light and therefore a greater proportion of the radiation. Would this be scientifically accurate?

[ashen roost]

I've spent sm time on this but I cannot get the answer 😭

[viscid goblet]

Vm= is vel. Of man or boat
Vr =vel. Of river
D= width of river
d= drift

Also in the first image I just realised I messed up and it's
d(drift) = Vr × D / Vm

[viscid goblet]

Please check if my answer is correct or not-

[ashen roost]

Its correct

[ashen roost]

Got it

[weak prawn]

anyone up this naming?

[brittle wing]

Cs people any?

[ashen roost]

3 ethynyl hex 1 en 5 yne

[weak prawn]

yeah i got that....THANKS A LOT

[random glade]

Hi, can someone help me with these organic synthesis?

[somber jetty]

Bro electronegativity and electron gain enthalpy are different things

[ashen roost]

Oh yes my bad

[patent echo]

20 ml 0.1 M BOH solution

alpha = 100%

(B)

60 mL 0.15 M 20 mL 0.1 M HA solution

alpha = 19.8%

(A)

80 mL 0.25 M HB solution

alpha = 16.7%

(C)

among the mixture of a + b and b + c solution which will be effective?

[dull stratus]

may somebody give me a website or ebook to learn more about plant hormones, please? im running out of sources 😦

thanks in advance by the way

[uncut belfry]

i have a module, lil bit extra from basics. will that work/

[dull stratus]

that will do! I'd like to have it if you permit ☺️

[uncut belfry]

Hey, i need help to access mtg ncert fingertips book online. Does anyone have a pdf ?

[dire shuttle]

yeah books

google

chat gpt

stack exchange

asking friends is way better(classmates)

[gloomy steeple]

believe me, doing that doesnt make much difference(Just read whole Ncert and write Important points on the left side of the page)

[uncut belfry]

okay thankyou <33, I was getting stressed over where do to ncert based ques from

[gloomy steeple]

you can use Marks App for questions practice

[uncut belfry]

fine, ill try it ty

[tawdry remnant]

Can any body help me with this

[ashen roost]

Is it 15

[tawdry remnant]

Yes

I got it

Through similarity of the triangles

[golden nexus]

hey, i need to solve a test on dynamics(its a practice paper which i need to submit tmwr) can anyone help me with that on vc?

[lofty flame]

anyone able to help with organic chem?

[warm reef]

aakash?

[warm reef]

Step 3 motion in 2d

[ornate moon]

could u use kinetic energy = 1/2 mv^2 for relativistic motion, like when an object is moving at a velocity close to the velocity of light?

[quartz comet]

Close to. Yes. At the speed of c no

I think you look at it from a relative perspective yes. If not no

Because you conserve the energy in the world
View and not a relativistic vireuw

[tawdry remnant]

My friend was from aakash , so we solve the questions together

[tawdry remnant]

Got it

We can apply similarity of triangles too if we draw the relative path of the balls

[warm reef]

Explain please

[tawdry remnant]

Uhh just draw the path of the balls in relative to each other

Then you’ll get it

[olive oar]

helloo is anyone here taking a physiology module or anything thats related i have a qn abt epithelial tissues 😭

[sage cipher]

yeah

[empty turret]

Does anyone know what William Thomson's theory is ?

[rare dagger]

Plum pudding model of the atom

It's the idea that the atom looks kind of like a pudding with berries mixed into it. The custard/cream is positively charged matter and there are negatively charged "berries" or electrons embedded and mixed into the pudding.

[thorny gyro]

watermelon model

[rare dagger]

https://tenor.com/view/watermelon-kerby-watermelon-kerby-gif-23259892

[weak gazelle]

Anyone have tips for a student just starting out Organic Chemistry?

[rare dagger]

Uh yeah. Switch majors.

[weak gazelle]

😭😭😭

[languid willow]

is it that the rough ER is for transport

and smooth ER is for storage

or what

i forgot lol

[torn oar]

i wouldn’t stress it too much, just make sure to put in the time to study. it requires a lot of practice

it’s not conceptually difficult, just a lot to remember

in my experience, it was the first undergraduate course that i really needed to study for, whereas before that, i could mostly study a day or two before and be fine

[rare dagger]

Just kidding. In all seriousness:

1. Learning OChem is quite different. You can either understand why certain things are (which takes a lot of time at the beginning, but makes it easier down the line), or you can memorize all of the rules and their many exceptions (still time consuming at the beginning, but less than trying to understand - but you will suffer down the line trying to learn harder concepts). I'd suggest spending the time learning why things are at the beginning. That will cut into your social life quite a bit as you may have to read one chapter 3 or 4 times if you don't understand it. It is worth it down the line, however.

2. The general rule applicable in almost all situations is the following:
   When comparing the effects of different phenomenon on the electron density of an atom,

Resonance > Induction > Hyperconjugation

(these words won't make any sense now, but once you learn them, it is the more general rule that you can use to solve what seems to be weird rules and exceptions)

3. Do all the practice problems. It helps.

[rare dagger]

Rough ER is for protein synthesis and packaging.
Smooth ER is for storage and transport.

[languid willow]

i love u

have my exam in 36 mins

7:30 am exam

wish me luck

[uncut sable]

don't freak out if it seems a bit overwhelming at first, it's like learning a new language, but for molecules. visualize it. Draw those molecules out, make models if you can, it'll make things way clearer. And speaking of clarity, practice is key. Solve problems, work through examples, and get comfy with reaction mechanisms. Don't hesitate to ask questions if udk, ask ur professors,here, or get a study groups/ study buddy.

[green ginkgo]

need help (redox rxns)

[dense heart]

I think i can help you

[dense heart]

I will explain it to you in 15/20 min

[green ginkgo]

Yea this is okay, but I wanted to know how to do this using the ion electron method I.e. by writing the half reactions (oxidation and reduction) separately then balancing number of atoms, charge, oxygen and hydrogen atoms etc.

[summer bronze]

Hi, is there anyone who could help me with solving mechanical exercises of rigid bodies (exercises include determining the rotation matrices of a certain object with certain movements, calculating kinetic energy with laws of motion and conservation, and calculating inertia tensor of objects) it is exam level so it’s quite difficult. Dm me if you can help! Thanks 🙂

[dense heart]

i found something on internet but i don't know if you want to open a link from a stranger

[green ginkgo]

If it's https (secured) then that's fine

[dense heart]

https://www.periodni.com/half-reaction_method.php

ok so there it is

you put your equation and it explain

i think its pretty welle explain

[green ginkgo]

Alright, thank you

[dense heart]

good luck !

[broken plaza]

any of yall know where to get a pdf on cengage class 11

physics or chem or math idc

[thorny gyro]

libgen.li karke dhoondhna bro vahan pe saare books ka pdf mil jata hai
https://www.youtube.com/watch?v=g5yyDqF_HPE&pp=ygUgaG93IHRvIGRvd25sb2FkIGJvb2sgYWRpdHkgZ3VwdGE%3D

[thorny gyro]

does anybody know the reason of a being gene and b being chromosome?
i asked 2 teachers of LN and both of em had different reasons

[uncut belfry]

i have this to explain the gene part. tho I suggest you learn which statement is for gene and which is for chromosome. Dont dwell on the explanation sm because every expl is different and you will onlyy get more n more confused

[thorny gyro]

thanks a lot, just wanted to know the reason but now i get it, thanks again!

[neat harness]

question : a ball is thrown and car starts to move simultaneously . find equations so that ball strikes the car while landing . i would like to know how x = 2uvsinθ/g . thank u .

[ashen roost]

Look at it carefully
It is mentioned that x =vT
And R = x + d
And also R = u^2sin2theta/g
Which is nothing but the horizontal displacement also given by ucostheta × T
And T is given by 2usintheta/g
So by substituting T there we'd get
R = ucostheta × 2usintheta/g
ucostheta and usintheta are nothing but the components of initial velocity u
By further substituting formula we get
R= u^2sin2theta/g
(As 2sintheta × costheta = sin2theta)
And for the question we take velocity of car as that ucostheta i.e horizontal velocity and d distance has already been covered
So the prior equation becomes
R = d+ v×2usintheta/g (Horizontal displacement of car)
(ucostheta is v here)
Horizontal displacement of car = horizontal displacement of ball
For the ball to land on car
Hope this helps you

[neat harness]

Thank u very much

[whole nacelle]

Abj sir 🔥

[zealous moth]

If the error in measurement of momentum of a particle is 10% and mass is known exactly, the permissible error in the determination of kinetic energy is ___

Can someone solve it and help me pls

[lyric dove]

yo, does anyone have any chemistry textbook recommendations (introductory level)?

[neat harness]

can someone tell me how to solve this please

[ashen roost]

Is it 20% ?

Ans is d

But why is it not c?

[velvet gorge]

I am a bit confused in this one

So I do get it that

[winter breach]

ayo whats the diff bw electrovalency and covalency

is it like ev applies to ionic bonds only?

and covalency applies to covalent bonds?

[ashen roost]

All you have to do is to find such units of A B C and D which would give the unit of force i.e kgm/s ^2
And we have to add AcosBx + Csin Dt
Here both AcosBx and CsinDt got be equal to the units of force cos we can only add the terms that have same unit ( like you can add meter and meter not sec and meter)
Cos Bx here Bx is angle so no units are requires so B would in turn become x^-1 to cancel out the unit
Same w C sin Dt here Dt is angle so D would become t^-1 to cancel out units
And A and C would have dimensions of force as like dimensions add
So dimensions of
A and C [ M^1 L^1 T^-2]
B [L^-1]
D [T^-1]
In equation AD/B it would become [ M^1 L^2T^-3]

[velvet gorge]

Thanks G

[thorny gyro]

electrovalency is- ionic bond ke formation mein kitne elctrons share hue, (no of electrons lost or gained in the formation of an ionic bond) so covalency and electrovalency is different. liek, 14th block elements dont form ionic bonds so their electrovalency is zero

[winter breach]

okok ty

[buoyant ocean]

BRO
FRЕЕ GIFТ DISСОRD NIТRO - https://cutt.us/giftgetpremium

[brazen willow]

are trophic structures and food chains the same thing ?

[sullen grail]

Does any know the dominant arguments of strig theory? I just really want to learn more about it

[dusty breach]

Struggling with unit conversions

[thorny gyro]

hiii

is anyone good at physics (high school level, gr 12) ??

please dm me!! bc i'm not having trouble with just one question ...

[uncut sable]

hi sadly im not good at physics im sorry😭

[civic nebula]

Exactly when do we use the 'e' at the end of the word root in IUPAC nomenclature?

[civic nebula]

Are you not comfortable sharing the question here?

Which topic is it? Maybe I can help

[thorny gyro]

a conceptual doubt if anyone knows chemistry/physics: In vanderwaals gas equation, why is ideal pressure multiplied to real volume. Why didn't we take both ideal.
V-nb = volume(real) (since real volume is lesser that ideal. )
P(real) + a(n/v)^2 = P(ideal) Since ideal pressure is more.

I mean since real pressure and real volume both are less than ideal, why do we add to pressure term and subract from volume term. Why not subtract from both?

[civic nebula]

Have you tried by using the formula?

[thorny gyro]

No P(ideal) is already more than real, why would u add more. But anyway I got it. at leat I hope its correct

Vi/Pi= Ideal volume/pressure
Vr/Pr= real vol/pressure.

I was wrong, We dont multiply (Vr * Pi)
We multiply Vr * P(pressure that would've been if there was only volume correction, i.e., pressure according to Vr)

P(pressure according to Vr) = nRT/Vi-nb

Pr = (nRT/Vi-nb) - a(n/v)^2
(nRT/Vi-nb) = Pr + a(n/v)^2

So in equation: P(what should've been according to Vr) * Vr = nRT
so (Pr + a(n/v)^2) (Vr) = nRT
Now put Vr= Vi - nb
(Pr + a(n/v)^2) (Vi - nb) = nRT

[civic nebula]

Sorry
I was wrong on the P real part

[civic nebula]

How did you get the
Pr = (nRT/Vi - nb) - a(n/v)^2
Though?

[thorny gyro]

refer to the derivation,then youll get it

[civic nebula]

What's the role of P ideal?

Does it have any effect in any way?

[thorny gyro]

i dont think so. I think (nRT/Vi-nb) is the new P ideal for this new corrected volume. And we just replace it

[echo owl]

@civic nebula yes, but can’t reach to the answer, if it is possible send me a sloved solution please

[fair pulsar]

Need some help with 3 step unit conversions for Chemistry

[civic nebula]

Distance of object from objective is 2.3 cm, right?

Checking if my answer is correct to send you the solution

[echo owl]

Yes

[civic nebula]

Sent you he Sol in dm

[thorny gyro]

Can someone suggest me a good applied physics professor on YouTube

[rancid barn]

heyy all
why is the 3d orbital filled before the 4s orbital when we consider transition metals?

[uncut sable]

Walter Lewin's MIT OpenCourseWare, Dr. Don Lincoln, Physics Girl,PBS Space Time, Flipping Physics

[late pivot]

4s is filled before 3d because of n+l rule

except for chromium and copper where 4s has 1 electron because where in in chromium it is 3d5 and copper 3d10 because half filled orbitals have more stability

[warm reef]

Heyy

Can anyone help me

[uncut belfry]

do u have options?

[weak prawn]

hey
i wanna study some concepts of inorganic and organic chemistry in detail
but cant find the right source for it cna anyone suggest ant good online source for(trustworthy papers and research)

[weak prawn]

A possible solution
X=5/2
Y=20

(please don't mind the handwriting..it was just a Rough attempt)

[neat cypress]

i think peter atkins books can help you a lot, we used them for our studies in university - they are great for chemical principles, as for organic chemistry the book organic chemistry by l. g. wade is great

does anyone here understand thermodynamics?

and if yes haha, do you know how i know if the process gives me negative or positive work?

like i understand if its + or - for compression and expansion but i have a hard time figuring out when its a + and when is it a - when we have heating or cooling processes

[weak prawn]

thanks a lot

[neat cypress]

no problem, hope they help

[weak prawn]

afa ik
you just have to check if the work done is ON the system or BY the system

simply putting
if the work is being done by the system on the surrounding its +ve

if its done on the system BY its surrounding , its -ve

(in usual terms...if system gives out work (NOT ENERGY) its +ve

and if it take in work it -ve)

hope it helps

[weak prawn]

understandable

[fair hearth]

Hii Excuse the working out I’ve been a bit stuck on question 14 a and b could I get some help please??

It’s physics heh

[potent fossil]

any resource to compleate qualitative analysis

jee chemistry

[uncut sable]

u can try NCERT chemistry textbooks. or consider using reference books like Concise Inorganic Chemistry by J.D. Lee, Qualitative Inorganic Analysis by Vogel, or Inorganic Chemistry by O.P. Tandon.
u can also use websites like Khan Academy, Vedantu, and TopperLearning. they offer free video tutorials and practice questions for JEE chemistry, including qualitative analysis as far as ik. watch Yt channels like Unacademy JEE, Chemistry by Arvind Arora, and Examrace JEE Chemistry.

[next cedar]

Why is the blastula a prime specimen for observing mitosis

[vague sparrow]

hi guys! im starting physics degree next year. Anyone could tell me their experience studying physics? im pretty sure I love it but I want to know more about the experience. Thanks!!! ::)

[glossy galleon]

It’s good

[quartz comet]

Hard but fun

You go 100% or you don't. Give all you have and it will be rewared. Wonderful classes, loads of mathematics. Mostly I'd say its harder to understand the physics rather then the mathematics, but that's personal.

1 thing: you'll hear the world "trivial" a lot, turns out it wil not be as trivial as you thought it would be xp

[fiery star]

Hi erWin.
The overall experience is pretty awesome :D. Just wanted to share one of the best pieces of advice I was given in my early days. Take as many programming related classes as possible, not only is it necessary for doing theoretical physics, but will also open more doors for you, which translates in more freedom 💪 .
Good luck

[velvet gorge]

Can someone solve this for me in vector form

[unkempt laurel]

Hello! I am completely new to programming (as you probably can tell from my question :D) and just started Computer Science a week ago. I need help with figuring out why my code does not work(language: F#). The program is supposed to work this way: repeatedly asks for the name of a programming language and if the user enters "quit" the program should say "bye" and stop. if the user enters "fsharp" it should be able to say "Fsharp is cool", otherwise write "i don't know <name of language(which the user put in)>.

It would be very helpful to provide me with a new optimized code and also an explanation as to what has changed and what my mistake was.

The error messages if needed: "Unexpected string literal in expression. Expected incomplete structured construct at or before this point or other token." "The value or constructor 's' is not defined." "Incomplete pattern matches on this expression. For example, the value '"a"' may indicate a case not covered by the pattern(s)."

thank you,

[restive valve]

a few things:
you should add a "| " before each case in the match expression (lines 5 and 9)
you don't need to add extra "" before and after the %s (line 17)
since you want to repeatedly ask you that thing, you should put it at the beginning of the function (move line 15 right after line 2)
move line 17 to line 13 so that it keeps saying "i don't know..." everytime you don't input one of the other choices
only call the function again in the cases | "fsharp" and | _ and don't call it in the case | "quit" as you don't want the function to run again (delete line 11)
line 16 now becomes obsolete

check if this works for you

let rec readtheProgrammingLanguage() =
    printfn "please enter the name of a programming language, 'quit' to exit."
    let a = System.Console.ReadLine()
    match a with
        | "fsharp" ->
            printfn "Fsharp is cool"
            readtheProgrammingLanguage()
            
        | "quit" ->
            printfn "byyeeee ^-^"
            
        | _ -> 
            printfn "i don't know %s" a
            readtheProgrammingLanguage()

readtheProgrammingLanguage() 

[unkempt laurel]

wow thank you sm i really appreciate it makes so much sense now

[vague sparrow]

well it is good to hear that because I already am a programmer! nice!

[vague sparrow]

thanks!!! I believe I'm going 100%. I love phyisics and the desire to actually understand the world is to heavy to not feed it

[restive valve]

you're welcome :)

[quartz comet]

You don't need more

[vague sparrow]

really guys thank you so much that was helpful!

[vague sparrow]

do you recommend strong math experience before starting? I'll have the whole 2024 summer to study

[quartz comet]

Oh yeah haha

Learn how to write proofs

Here in Belgium, the math classes are really prove based

Revisite the basics

[vague sparrow]

well i'm from spain but I don't think it will be so different

[quartz comet]

Great

Euhm

Get like a really deep understanding of the basics of physics

Like really really deep

[vague sparrow]

like gravitation, relativity, termo...?

[quartz comet]

Jeez

That's graduate level hahaa

Mechanics, thermo, dynamisme, electrostatics,...

[vague sparrow]

Got it

Thanks ❤️

[quartz comet]

You'll notice things are way easier when you have the basics ON POINT

[velvet gorge]

From where did the value of dm came from

It's a rod