The h Bar

Balarka Sen

00:04

@0celouvsky Yes. That literally means $\omega$ integrates to zero along any closed path, so it's path-independent.

Write $f(x) = \int_{a}^x \omega$ where $a$ is some fixed point other than origin. This is integrating along a path from $a$ to $x$, note, but that's of course independent of the chosen path.

You can check $\omega = df$.

0celouvsky

00:41

@BalarkaSen what? It's only zero along that one specific closed path

Balarka Sen

@0celouvsky Any path is homotopic to a multiple of that.

0celouvsky

There's an argument needed to get it to work for others

Smoothly?

Balarka Sen

And integral is homotopy-preserving.

0celouvsky

Assume I don't know that

Of course I do know that, it wasn't the point of the question

Balarka Sen

@0celouvsky What does that even mean? de Rham cohomology means you are working with smooth paths. In any case, any path - not just smooth ones - is homotopic to n[S^1] in $\pi_1(\Bbb{R}^2 - 0)$.

0celouvsky

00:43

Of course, but it's not clear to me how to make the homotopy smooth

Algebraic topology gives you a continuous homotopy

Balarka Sen

No, this is trivial. You do the whole covering proof all over again but when you glue stuff above you use bump functions. I am not going to write this down but this is true.

0celouvsky

And I'm agreeing with you, but I don't want to do any of that

I figured it out, you can straight line homotopy to rectangles

From there you can compute the function f and show it has the desired properties

Balarka Sen

whatever man

the proof is trivial, and that's the point

Slereah

hzy

0celouvsky

00:59

@BalarkaSen it's not trivial for a class that doesn't use algebraic topology

Slereah

Apparently the whole backward travel when you go faster than $c$ has a specific name

The Tolman paradox

Because of its very first appearance in Tolman's SR book

0celouvsky

what's up with that anyway

is it even true

Slereah

Well it's easy enough to see

0celouvsky

@Slereah is Tolman the guy with the star solution?

@Slereah how?

Slereah

Take a spacelike curve slightly avoce the $x$ axis

Do a Lorentz transform

For a big enough Lorentz boost, the spacelike curve goes under the $x$ axis

going "backward in time", with the notion of time of special relativity

0celouvsky

01:12

hmm

Balarka Sen

@0celouvsky Path lifting lemma is not truly algebraic topology.

Slereah

01:26

I guess the whole notion of closed causal chain is a pretty good description of what I mostly cover in the book

Except for shit like Norton's dome

Since I don't cover all causal breakdowns like QM

Sir Cumference

01:51

Any people good at basic cosmology here?

Bernardo Meurer

@SirCumference I can spot the southern cross, is that good enough?

Sir Cumference

@BernardoMeurer 'fraid not

@Slereah Oh wait, could you help?

Bernardo Meurer

You said basic

Sir Cumference

Too basic

Bernardo Meurer

I can get more acid if you want

Sir Cumference

01:56

@BernardoMeurer Oye, chemistry puns

Reminds me of high school, when every class was just a ton of puns

"What does the chemist say to the atom he's observing? I got my ion you."

Bernardo Meurer

I remember high school as that period where I couldn't be arrested

I also didn't really do anything useful, which was absolutely great

Sir Cumference

@BernardoMeurer okay.

I had some fond memories of high school.

Bernardo Meurer

Did you get amnesia?

Sir Cumference

Oh god, I'm 18.

@BernardoMeurer *fond :P

Bernardo Meurer

We're all babies, I don't get why you're portraying High School as some 19th century expedition to Fiji

Sir Cumference

02:00

@BernardoMeurer I dunno, back then things were way simpler

Bernardo Meurer

My life is pretty simple

Simply shit

Sir Cumference

Um. Sorry?

Anonymous

@BernardoMeurer A baby who drinks beer? ;)

Bernardo Meurer

@blue You're a baby until you're ~25

Anonymous

@BernardoMeurer I know a 70 year old baby from the US...

Sir Cumference

02:03

@BernardoMeurer That's an oddly specific age

Bernardo Meurer

@SirCumference Thanks, I just came up with it

Sir Cumference

@blue No more politics...

Anonymous

@SirCumference What?

Jaime Gallego

Trump

Sir Cumference

>_>

Anonymous

02:04

When did I mention politics? =P

Anonymous

I didn't even name anyone

Anonymous

lol

Sir Cumference

You don't need to name someone for you to know it's politically related :P

Anonymous

See, your head is full of politics =P

Sir Cumference

Stahp

Anonymous

02:05

lol

Bernardo Meurer

@SirCumference Stop with the politics ganger-schlamper

Let the man express himself

Anonymous

@BernardoMeurer That's a nice new word there :D

Anonymous

ganger-schlamper...hehe

Sir Cumference

@blue "Thanks, I just came up with it"

Bernardo Meurer

I also just came up with it

I bet someone here googled to see what it meant lol

Sir Cumference

02:07

Too lazy. ELI5?

I wonder what happened to Chris White...

Bernardo Meurer

PLEASE COME BACK CHRIS WHITE

3

Sir Cumference

Oh god this again

Bernardo Meurer

I still need you to teach me how to use Valgrind to find memory leaks

WHY DID YOU LEAVE ME

I LOVED YOU

Sir Cumference

@BernardoMeurer btw what are ya majoring in?

Slereah

Hey, that GR paper is by a lady

That's unusual

Lisa Dyson

I wonder if she's related to Freeman Dyson

Bernardo Meurer

02:18

@SirCumference Computer engineering, assuming I manage to graduate

Anonymous

@BernardoMeurer Are you focused on software or hardware engineering?

Bernardo Meurer

@blue I'm not sure yet, maybe hardware

I change my mind a lot on that

Anonymous

@BernardoMeurer That's great. Very few people I know are interested in hardware!

Anonymous

Most are into coding stuff

Bernardo Meurer

I like coding a lot, but I just love the black magic involved in hardware design

Yashas

02:23

!

Sir Cumference

@BernardoMeurer That's neat

Anonymous

@BernardoMeurer Nice :-)

Sir Cumference

@BernardoMeurer What languages ya like?

Bernardo Meurer

@SirCumference C, C++, Python, Rust, VHDL, eh

Anonymous

I know only basic java :-P

Bernardo Meurer

02:24

I think that's it

Mostly C and C++

Sir Cumference

I've used JS, HTML and CSS for about 4 years

Those are all I know well

Bernardo Meurer

HTML and CSS are markup languages

Jaime Gallego

^

Sir Cumference

Yes yes, I know

I asked "what languages ya like"

Bernardo Meurer

Ah

Portuguese

Mostly

Sir Cumference

02:24

@BernardoMeurer Well played

Yashas

I'm voting to close this question as off-topic because the same question was asked and answered on MathOverflow. — ZeroTheHero 11 hours ago

We close questions for cross-site duplicates?

Sir Cumference

@Yashas Nah

Unless it's asked by the same person

Anonymous

@SirCumference Actually don't think the number of software languages you know matters much as long as your basic coding concepts are great. It is better to master one language than to go about learning 10 coding languages.

Anonymous

Once one language is learnt the concept can be easily converted to other languages..

Sir Cumference

@blue Well if you know how to program in one language, learning another is waaay easier

Anonymous

02:28

@SirCumference Yeah, that's my point

Sir Cumference

Yeah, posted too late.

Yashas

@SirCumference I think that depends on the language the person knows

Sir Cumference

@Yashas I'm speaking generally :)

Most programming languages are very similar

@Yashas Oh, btw, are you in college?

Yashas

not yet

Jaime Gallego

C is probably the best one to start with. JS has plenty of quirks.

Yashas

02:30

should've been but I am crazy

Anonymous

You are crazy ^ :-P

Sir Cumference

@JaimeGallego I heard C is really tough for beginners

Jaime Gallego

It isn't

Anonymous

Who leaves IISC and then again reappears for JEE ?

Jaime Gallego

At all

David Z

02:31

@Yashas As @SirCumference said, if it's not asked by the same person, definitely not. If it is asked by the same person, then it's probably best to comment to point it out and also maybe notify a mod.

Sir Cumference

Also, what kind of "quirks"? :P

@Yashas If they're not asked by the same person, you should add a comment that it's already answered on another site, and link it.

But it's not necessary to close it

Jaime Gallego

@SirCumference Mostly those regarding variable types. In C, one has to define a type explicitly (int...). JS is much more lax.

Sir Cumference

@JaimeGallego Oh yeah. In JS we have "var" and "let"

The difference is subtle

Jaime Gallego

Because it relies so much on interpretation, sometimes mysterious behavior can result

Often exploitable

JSFuck

JSFuck is an esoteric programming style of JavaScript, developed by Martin Kleppe, where code is written using a very limited set of characters: (,), [, ], +, !. The name is derived from brainfuck, an esoteric programming language which also uses a minimalistic alphabet of only punctuation. Unlike brainfuck, JSFuck is valid JavaScript code, meaning JSFuck programs can be run in any web browser or engine that interprets JavaScript. The challenge in JSFuck lies in recreating the full set of JavaScript functions using only these six characters, which is made possible by two properties of JavaScript...

Sir Cumference

So I've heard

Never actually dealt with it tho

The main problems I have with JS variables is that you can't "freeze" a value

If you set "var woof = dog", and "dog" changes, "woof" will change

Some ability to keep them frozen would be incredibly helpful

Jaime Gallego

02:36

Is it so? That's incredibly unintuitive for programmers

Haven't touched JS in a while

Sir Cumference

@JaimeGallego It's pretty terrible. But that's the worst limitation I've come across

I've been lucky to not have to deal with problems caused by var's vagueness

Anonymous

@SirCumference There must be some detour. Have you checked it out with somebody? Stack Overflow?

Anonymous

That is a weird limitation for any modern language

Sir Cumference

@blue I remember spending hours trying to figure it out, and reading on SO that it's impossible

Anonymous

WEIRD!

Sir Cumference

02:41

I'm trying to find that answer

Bernardo Meurer

So wait

Jaime Gallego

@SirCumference As long as you are comfortable with memory management (which isn't that hard), C is easy to use. C++, on the other hand...

Bernardo Meurer

Variable assignment in JS happens by pointer collision?

Sir Cumference

Huh, maybe I'm crazy

I can't find it

Bernardo Meurer

If that's the case that's absolutely shit

@JaimeGallego Hm? I think you got things mixed there, C++ is much easier than C

much

Sir Cumference

02:45

Wow, I realize my example was awful

JS will keep "dog" the same if "woof" changes. I'm so tired

Jaime Gallego

Ah, that makes more sense

Bernardo Meurer

Ah

Sir Cumference

However, if you're using something like jQuery and you set "dog" to be the height of the page, and you change the page's height, "dog" will always change

There's no way, to my knowledge, of freezing it

@SirCumference This was just an example, btw.

Bernardo Meurer

I can see the pointer magic happening in the background there

Sir Cumference

It happens in lots of other cases

Jaime Gallego

02:47

@BernardoMeurer I really do find C++ much harder than C. Lost myself with templates and other idiosyncrasy.

Bernardo Meurer

Templates are a blessing

I guess you just need to understand classes better

That takes some work

Sir Cumference

@Slereah Plz help

Jaime Gallego

@BernardoMeurer The concept of a class (and its instances) is easy to grasp. What's harder to learn is the minutia of everything in the language.

Bernardo Meurer

@JaimeGallego Meh, i didn't find it easy to grasp

Shing

does anyone know the reason that

in C langauge

for a calculation 1/10

if I want to show 0.100000000.....

the computer will tell me a wrong answer

sth like: 0.1000000000000000004251341314

why?

Jaime Gallego

02:58

Floating point arithmetic

A binary computer cannot replicate some particular numbers at infinite precision

Shing

so basely the computer only operate with 64-bit-number, anytime I let it go beyond that

it will go wrong (without telling me a error)?

David Z

@Shing 53 bits of precision (or roughly 15-16 digits), I believe

Shing

okay, I see

thanks everyone for the help

David Z

And yes, it will give you a wrong answer without notifying you of an error. These errors happen billions of times in the execution of a typical numerical computing program; it would be pointless to notify you every time.

Jaime Gallego

@Shing This is a famous instance of an error like this ruining everything

MIM-104 Patriot

The MIM-104 Patriot is a surface-to-air missile (SAM) system, the primary of its kind used by the United States Army and several allied nations. It is manufactured by the U.S. defense contractor Raytheon and derives its name from the radar component of the weapon system. The AN/MPQ-53 at the heart of the system is known as the "Phased array Tracking Radar to Intercept on Target" which is a bacronym for PATRIOT. The Patriot System replaced the Nike Hercules system as the U.S. Army's primary High to Medium Air Defense (HIMAD) system, and replaced the MIM-23 Hawk system as the U.S. Army's medi...

Shing

03:03

oh... my goodness

ppl got killed

Anonymous

@DavidZ Thanks a lot. Were you born in China or you are there for work purpose ? "David" doesn't seem a native Chinese name!

Slereah

@SirCumference on what

Sir Cumference

@Slereah Big space stuff

The actual question I have: Say we have two galaxies. Due to the Hubble flow, their proper distances are increasing, but their comoving coordinates are not changing.

Now say we turned off the Hubble flow and allowed gravity to do its thing. Would the comoving coordinates change as the proper distances decrease?

Jaime Gallego

@Shing Yes, that sadly happened. There are other cases, such as the Therac-25 or the "unintendedly accelerated" Toyotas, which should convince anyone in those kinds of industries to code safely.

(They still don't)

David Z

03:21

@blue I only worked there for a couple years. (So I suppose you should take what I tell you with a grain of salt)

Slereah

Their comoving distance is probably decreasing in the first case, too

Since they still attract each other

It's just that we assumeperfect homogeneity when there is none

0celouvsky

@BernardoMeurer 25 is when the brain is fully matured and alcohol cannot damage it

I am waiting until 25 until I drink

Jaime Gallego

Birds are chirping

I should go to bed

Shing

@JaimeGallego good night.

or good morning(?)

Jaime Gallego

Good morning, good evening and good night

Catch you all later

Joshua Lin

03:32

that movie was beautiful

0celouvsky

Christ...sobolev spaces on piecewise $C^\infty$ domains

I give up

take me now, lord

Sir Cumference

@Slereah Wait, I thought Hubble flow doesn't affect comoving coordinates?

Slereah

if you just consider the effect of the FRW metric, yes

But then that means there's no attraction between galaxies

the gravity is the same in all directions, if you will

Sir Cumference

03:47

@Slereah Wow. I'm dumb.

BAYMAX

04:16

any help on SAXS?

Why Cellulose Macromolecules are well characterized by SAXS technique?

user228700

05:03

@JohnR: Morning :-)

John Rennie

@Kaumudi.H Morning!

user228700

My father has brought home ~25 mangoes from Kerala!

John Rennie

25! :-)

Green or ripe?

user228700

Ripe!

user228700

My grandma tells me that they're all deliciously sweet and juicy.

John Rennie

05:09

Mmmmmmmmmmm :-)

user228700

I wonder why she bothered to send it with him; I'll be in Kerala this time next week.

John Rennie

In the UK the mangos we get have been picked when green and ripened in the hold of the ship. They are OK, but nowhere near as good as mangos fresh from the tree.

user228700

I see. That's a shame :-(

John Rennie

There's no other way to do it.

If you tried to ship fresh mangos to the UK they'd be rotten by the time they got here.

user228700

Hmm, yes...

John Rennie

05:12

You could fly them over I suppose, but they'd be expensive mangos!

Are you going to Kerala after the last exam?

user228700

As a child, I used to while away afternoons on a particular mango tree overlooking a field in my native place; sometimes my friend would accompany me and we'd have freshly plucked mangoes for lunch. At other times, I'd take books with me.

user228700

@JohnRennie Yes and no. I'm going to Kerala next week to write an exam over there. My last exam is in May and after that, yes, I will go back to bring back my sisters.

John Rennie

Ah. Well good luck in Kerala!

I may be a little distracted for an hour or so. Server problems ...

user228700

Thanks! I'm going only next week though.

user228700

Wokay!

John Rennie

05:39

@Kaumudi.H It's the weekend that our 500 or so servers install Windows updates then restart. There are always a few servers that fail to restart properly, and I get to manually fix them. Lucky me :-)

user228700

Ouch >.< Does it take a terribly long while to fix them?

John Rennie

Around 15 minutes per server

And there are about a dozen servers down

user228700

Jeez, that's close to 3 hours! Well, good luck! :-(

John Rennie

It's generally not scary. Usually turning them off then on agin does the trick :-)

Secret

05:55

I think there must be a lot of JEE discussions going on in h bar recently, cause last night dream, I, despite being a postgrad, was required to take something called the New South Wales National Exam

user228700

Oh man, I'm so sorry x'D

Anonymous

@Secret Aaaaahhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

Anonymous

JEE has gone viral

Anonymous

How did the exam go ? :-D @Secret

Secret

This (fictional, since it is a dream) exam is something even larger scale than JEE, it is an exam which take place in NSW and is required to be taken by all people in australia from high school up to postgraduates. The exam scheduling is also highly intense. For example, in the dream, the day I was asked to take the exam is Science I, which consists of 3 science subjects including maths, and spaced only 1-3 hors apart, and the next day in the dream, is Science II, which has two science subjects.

On that day, I almost late for my 15:43 hacking (forgot) exam had I not have the ability to rewind time back 30 seconds

My exam gone well, and the exam also uncovers some kind of undercover plot that is going on, some kind of bigger narrative involving two hotel chains

user228700

05:59

> Some kind of bigger narrative involving two hotel chains

user228700

Wtf?! x'D

Anonymous

@Secret Total number of high schoolers+ undergrad+ postgrad in Autralia, that's still not greater than 1.5 million (considering Australia's population is 23 million) =P

Anonymous

@Secret My goodness XD

Secret

@blue well, JEE is only for high schoolers right?

Balarka Sen

what kind of drug did you use last night

Anonymous

06:01

@Secret Yes, but we have 1.5 million students who take JEE.. (almost 1/15 of Aussie population)

Balarka Sen

i want some of that stuff

Secret

I am not sure, will spending the whole day doing my PhD calculations in a mac terminal count as a drug?

user228700

@BalarkaSen Why though? Do u want to experience these types of dreams? :-P

Secret

(my dreams are known to become very vivid whenever my brain is busy at calculations)

user228700

@Secret Your dreams are quite vivid even otherwise! :-o

Anonymous

06:03

@BalarkaSen Even drugs can't cause that much impact...lol :D

Secret

Basically, one hotel chain is owned by some japanese gang whose leader is a master in Judo. His chain is not very popular compared to his (unspecified) competitor. Somehow, some hackers are employed which hacks the financial sector, and this result in his hotel chain to slowly grew influence.
In the exam in the dream, one of the hacking technique was illustrated, which is basically to disguise the hacking as platformers, so that for any unsuspecting users who played those games, keystrokes such as arrow keys are mapped to certain commands in the terminal thus the gamers will be unwittedly b…

(that may be less automatic than a botnet, but it might be more effective given its unoticeable nature and that it does not install malware. I don't know where my dreams get all these crazy ideas from)

Balarka Sen

@Kaumudi.H well drug effects depend on he user; mine probably won't be about jee

Secret

speaking about malware, perhaps one reason there is a hacking theme in the dream because bernardo have been talking about a lot of hacking and uttering the term "malware" recently

Anonymous

@Secret That's hilarious....unfortunately I didn't see any dreams for atleast the last 5 years. Give me some tips! =P

user228700

@Secret What the heck. Wow...

Secret

06:12

I don't know, but try your best to remember them, because once you can remember your first dream, it gets easier because your brain will become used to dream recalling

SBM

Um

Balarka Sen

@blue get lsd and sleep on it

user228700

@BalarkaSen Are u from Punjab? :-P

user228700

(I'm aware that you are not; that was a stupid joke about Punjab)

Balarka Sen

i have heard they are into drugs too

SBM

06:13

Mangoes and JEE

Secret

For me, I have a very strong motivation to remember and log my dreams: I want to extract the otherworldly ideas that are from my dreams, because some of them (similar to kekule) are usable and realisable. These ideas are often so far out from the patterns of the waking thoughts it is very hard to reproduce them

Anonymous

@BalarkaSen I was thinking of cocaine and heroin XD

user228700

My friend goes to university there and marijuana is grown inside their campus in the open space and nobody does anything about it! (@blue: I'm speaking of IISER Mohali, BTW)

Balarka Sen

@blue those are stimulants, not hallucinogenics.

SBM

Wait, hallucinations

Anonymous

06:15

Cocaine

Cocaine, also known as coke, is a strong stimulant mostly used as a recreational drug. It is commonly snorted, inhaled as smoke, or as a solution injected into a veins. Mental effects may include loss of contact with reality, an intense feeling of happiness, or agitation. Physical symptoms may include a fast heart rate, sweating, and large pupils. High doses can result in very high blood pressure or body temperature. Effects begin within seconds to minutes of use and last between five and ninety minutes. Cocaine has a small number of accepted medical uses such as numbing and decreasing bleeding...

Anonymous

Well, they do cause hallucinations too...

Anonymous

lsd is much milder

Balarka Sen

they do but their purpose is primarily different from LSD, Marijuana or other psychoactive drugs.

Read the introduction to Naked Lunch :P

user228700

I know what I know about drugs from The Perks of Being a Wallflower ._.

Balarka Sen

i have heard of that movie.

user228700

06:17

It's a good one.

Anonymous

I know about drugs from my "few" drug addict classmates....:P

user228700

Perks of being a wallflower - LSD scene CZ subtitles

►

SBM

What?

Anonymous

@Kaumudi.H I think there would be some punishment for stealing marijuana...

Anonymous

That's weird though

user228700

06:20

@blue Stealing?

Anonymous

@Kaumudi.H I mean, can they take away the marijuana ?

user228700

I doubt if the marijuana was originally planted by the institute...

Anonymous

@Kaumudi.H my gosh....

Anonymous

lol

Anonymous

0

Q: Computing $x^{2017}+\dfrac{1}{x^{2017}}$ given the value of $x+\dfrac{1}{x}$.

If $x+\dfrac{1}{x}=2017$, then the value of $x^{2017}+\dfrac{1}{x^{2017}}$ is, A) $2017^{2016(\sqrt{5}-\sqrt{3})}$ B) $2017^{2016(\sqrt{3}-\sqrt{2})}$ C) $2017^{2\sqrt{3}}$ D) $2017^{3\sqrt{2}}$ E) None of the above Progress: We could make use of the identity $$x^{m+n}+\dfrac{1}{x^{m+n}}=\...

algebra-precalculus

Anonymous

06:22

Good question ^

SBM

Haha

@blue

Anonymous

@SBM Haha at what? =P

Anonymous

The maths question?

SBM

Looks like everyone would continue using 2017 for more questions

It's pathetic

since $\sqrt{4068285}$

is irrational

Anonymous

It should be easy. Using properties of quadratic equations.

SBM

06:31

That number is not good looking

Bernardo Meurer

Good morning folks

Fawad

@BernardoMeurer goood morning!

Anonymous

2

A: Computing $x^{2017}+\dfrac{1}{x^{2017}}$ given the value of $x+\dfrac{1}{x}$.

Note that the equation $x+1/x=2017$ reduces to a quadratic equation, and clearly the two roots must be $x_1=\alpha$ and $x_2=1/\alpha$, since if $\alpha$ is a root, so is $1/\alpha$. Now, the coefficients of this quadratic equation are integers, which means that all symmetric functions in the two...

Anonymous

Great :-)

Balarka Sen

@Kaumudi.H Eh, well. Here is a one of my favorite "on high" sequences from a beautiful movie I watched recently.

SBM

06:40

:)

Anonymous

@SBM I'm thinking of a method to actually calculate the value

SBM

OK, @blue there's no harm in trying

user228700

@BalarkaSen Interesting.

Balarka Sen

I should also mention that literally every sequence from the movie is an on-high sequence. :P

user228700

I read the synopsis and yes, sounds like that would be the case :-P

user228700

06:53

The Perks of Being a Wallflower is also a book--->movie adaptation, BTW.

Balarka Sen

Ah.

NL isn't quite an adaptation of the book in the classical sense. In the words of the director, a literal adaptation would take 500 million dollars and would be banned in every country of the world.

user228700

x'D I see.

SBM

xD ?

Anonymous

@SBM grin

user228700

SBM

06:59

Oh

This chat jargon is really complicated, though ^_^

Anonymous

google is your friend :-D

Anonymous

@SBM Do you remember any thermodynamics from class 11?

SBM

Yes

Anonymous

So, here's a question for you:

Anonymous

If we add a ice cube to water and it melts. Suppose you have 1 mole of ice and the latent heat of fusion is say 6 kJ/mole. Then how will you find the entropy change?

Anonymous

07:04

It is a easy question =P

SBM

You see, it's just $$\dfrac{6}{273.15}$$ kJ per K

It's just one mole

right @blue

$\neq P$

Anonymous

@SBM Good

Anonymous

Don't know why I asked it

SBM

¿.)

Here's another simple one

Nevermind. Should be easy.

Sir Cumference

Anyone want to listen to my stupid jokes?

SBM

07:19

:( :(

Anonymous

Now a good question. There is a box having two insulated rigid compartments of equal volume $V$, temp- $T$ and pressure $P$ with gases 1 and 2 resp. How will you calculate the work gas 1 does on the other gas 2 when the partition between the compartments is removed ? @SBM

Anonymous

@SirCumference Go on

SBM

is it as easy as it looks?

Anonymous

It is easy

Anonymous

Depends on your understanding

Anonymous

07:27

You can consider them as monoatomic if you wish.

SBM

.

Gamma = 5/3

Nah

Anonymous

$\gamma=\frac{5}{3}$ is fine.

SBM

0

O

Anonymous

@SBM ??

Anonymous

How are you getting 0?

SBM

07:38

No

Adiabatic

Anonymous

@SBM So?

SBM

:(

Anonymous

08:14

@SBM Any ideas? :-)

SBM

Not really

Anonymous

Keep trying

Anonymous

We can discuss the answer tomorrow

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