@skillpatrol We should not have to guess additional information that's not in the question. Things that have more than one correct answer are usually in danger of being too broad or primarily opinion-based, though not always

@ChrisWhite Yeah, ok, that works out. Then I suppose twice the pressure?

$\gamma\mathrm{d}A = p\mathrm{d}V$, solve for $\gamma$ for both geometries, equate them, and solve for $p_\text{circ}$.

I would like to have a finite cylinder though, and maybe the longitudinal/radial expansions can be related if we assume that stuff has to stretch the same amount or something (dA/A being equal for all surfaces, maybe).

So, a quick answer, under those assumptions would be 2P0 @alarge?

@skillpatrol With the infinite cylinder assumption the pressure would be 2P0.

I didn't try the more accurate ones.

Thanks :-)

Guys

@ACuriousMind what is the most german food you can think of except something having potatoes or wurst?

@gonenc Hmmm...*Eisbein mit Sauerkraut*? In the north, rather something like a bun with herring or matjes

@ACuriousMind sauerkraut is the works thing ever yuk! but I'll try eisbein someday

I said without potatoes but I think a kartoffelauflauf is the best dish I've eaten in germany.

@gonenc: Here in the Southwest, Flammkuchen is also rather typical

@ACuriousMind Never heard of it.

it looks like a pizza so it is gotta be nice :D :P

It's close to pizaa, but the dough is a bit different and the usual toppings also differ from the usual pizza toppings

sorry, I can google that :P

@ACuriousMind Welp, I have discovered Immersive Armors is broken.

Not all of the armors are appearing and I'm missing menu parts the mod vid has.

I guess that's what happens when you instell over 70 mods ;)

Time to post on reddit...

Why is reddit so popular?

I've looked at it a couple of times but failed to see anything of interest.

I'd rather not-have-reddit :P

@ACuriousMind Is there a way to back up my game so if I ruin it by fucking with mods, I can get it back?

Looking at this load order, I think a patch is installed before its master...

@0celo7 Is "your game" here your save or the installation of the game?

Installation

Hm...usually, the mods should not damage the actual installation. If you think they have, you can always use "Verify integrity of game cache" under Properties->Local content in Steam

Well, I think they might damage each other.

How long are you staying up tonight?

I want to go over these Morrowind mods.

@0celo7 Just about to head to bed, I have class in the morning

Ah

Functional analysis, where we thankfully have left the Sobolev spaces behind

Pure math?

Pure math.

Alas, good #TimeOfDay, I'm off

Later pal.

reddit.com/r/skyrimmods/comments/3d2b3j/…

I am begging anyone with a reddit account to upvote ^^ so it stays on the front page of the sub.

Looking at this question I almost want to make a post about how SRT cannot really be appreciated without GR, but okay

It also makes me sigh and think about my Riemannian geometry test, where we are now, in two weeks, doing Riemannian geometry as a special case of Chern-Weil theory.

Hi, a quick question : in general relativity, can particles go over the speed of light ? I thought not, but I found this sentence is a lecture of Hawking : This means that if a particle is in a small black hole, you know its position fairly accurately. Its speed therefore will be rather uncertain, and can be more than the speed of light, which would allow the particle to escape from the black hole. (I haven't done any GR)

@Hippalectryon You can perceive particles that are not near you as traveling faster yeah

but that's just because the notion of velocity is kind of ill-defined for things far away from you in GR

Locally, $c$ is still a constant.

It's from hawking.org.uk/into-a-black-hole.html

Also, I'm not convinced that that thing you quote makes any sense

Hawking is nearing the end :(

Whatcha mean? Is his health declining?

Yep

@Danu But if it's still a constant locally, how does the particle escape ?

@skillpatrol Source?

@Hippalectryon Yeah, like I said, I'm not too convinced by that "argument".

It's the one that starts with If the amount of hidden information inside a black hole (hawking.org.uk/into-a-black-hole.html)

I read it

I'm not convinced.

@Danu he can only move his eyebrows now...

@Danu It says it's a discovery if his so I guess it has to be true, but maybe it's poorly worded here (?)

@Hippalectryon Poorly worded at best.

Does anyone know the real argument and can explain it in layman's terms (well I've done some physics but no GR) ?

I do

I just finished a course on that stuff

It's nothing like what's written there.

Cannot explain it in layman's terms, no

:c even the principle behind it ?

The principle is this

The notion of a particle is ill-defined in curved spacetimes. Therefore, some observers can see a thermal distribution of particles where others see none

@Danu The fact that OP needs to ask that question informs me that he doesn't know enough physics to start either.

True @KyleKanos

@Danu Wait. thermal distribution ? To me thermal links to temperature, which is defined by particles... (?)

@Hippalectryon You can define it in terms of the characteristic temperature that one would assign to this distribution of particles yeah

But this distribution of particles is non-existent to some other observers.

ok. please continue :D

So: A typical black hole is in a "vacuum" (i.e. no particles) state with respect to some observer's coordinates which do not coincide with the coordinates of us---observers far away from the black hole.

The change of coordinates induces a change in the notion of particle, so we actually see a thermal distribution of particles.

That is all

Ugh I thought a black hole was actually an accumulation of particles

That would be a white hole :P

A black hole is a white hole after getting a Brazilian

ಠ_ಠ

What's a grey hole then?

Michael Jackson Hole

Old white hole

:D

@Danu How can an accumulation of particles appear to some observer as a state with no particles ?

@Hippalectryon The notion of particle is observer-dependent in curved spacetimes

I gotta go now

bye guys!

@Danu Thanks !

Later pal

@Danu clearing things up a bit but obviously I'm still a bit puzzled. Can someone recommend good material I could use to get a good understanding of the problem ? I know it's not something easy, that it might requires a deep mathematical approach and not just a purely factual approach, but I'd like to learn more.

@Hippalectryon Not if you don't know GR.

@0celo7 Then what material do you recommend to learn GR :P

I'd recommend you learn SR first

You'll also need to be familiar with QFT

Basically where do I start (and which material do you recommend for that) ?

What do you know?

Not much in relativity. I just did a tiny bit of SR two years ago (basically, objects with near-light speeds and stuff) but assume that I should learn that again.

WHY IS MORROWIND 4:3

FUCK THESE MODS

Wot q_q why do you even play it, it's a pretty bad game. It was good when it came out but now ... Quests are pretty much "Go see the duke of ... !" - and you have to travel through the whole map to find that dude. No signs, no arrows etc.

Anyway, any recommendation ?

uh

busy, one moment

Read Zee for SR.