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18:00
@Danu you're a string guy, right?
@Danu Whenever you need
@Danu To quote the ocelot: Huh?
@ACuriousMind Proof?
2
Q: how is it proved that Qc/Qh=Tc/Th?

ergonI know how to prove that the efficiency is 1-Qc/Qh, but how do I go from that to 1-Tc/Th? Ie. what is the proof that Qc/Qh=Tc/Th?

@HariPrasad Why do you keep posting random questions?
18:03
I don't remember much from thermodynamics
@ACuriousMind is it worth answering?
@ACuriousMind I answerd it but now i think this question would be removed.
@Danu What should we have been helpful with?
@HariPrasad Yes, I think it will be closed as homework-like, especially since the question gives no indication the user has done anything to figure it out themselves
@ACuriousMind Ok thanks
I did a lot of work to make that diagram
18:23
@JohnRennie Do you work with XMBC-Kodi?
@HariPrasad I think he's retired
@BernardMeurer OK I got it.
18:37
@ACuriousMind With my impending death by freezing
@Danu We told you to play videogames
Sounds like great advice
I cooked instead---more efficient heat generation :P
Use your stove as a heater!
do you have a large metal plate?
@BernardMeurer I am beginning to see how you set your kitchen aflame :P
@ACuriousMind Pff
The other day we had a blackout and I built a phone charger out of a flashlight, a spare rechargeable battery and some wires
18:43
@BernardMeurer How did you do that?
Being a survivor takes sacrifices, sometimes it's a flashlight sometimes it's part of your kitchen
@Slereah literally eating grease right now
being an American has its perks
@BernardMeurer I need a DIY answer
@0celo7 I'd mock you but fuck I've done it
@Slereah you can't mock an American for being American
18:45
You know when you cook a whole chicken and then the pan is full of chicken grease?
we take pride in it
I fucking eat that
Sauce that shit with some bread
The most delicious taboo
@Slereah lol
@Slereah eating a deep-fried steak with gravy
delicious taboo?
18:45
Also good
What I like to do is
Shitload of butter in pan
Then put in a steak and some bread
So delicious
@HariPrasad It was one of those flashlights with a crank, I unwired the LEDs of it, wired that into a voltage regulator then into a battery to serve as capacitor to stabilize power once more and then I wired that output to a USB port
@Slereah Shitload?
Using a candle for soldering
@HariPrasad lol
Shit is used as an intensifier here
The scale is load, buttload, assload, shitload, fuckload
18:46
@Slereah Taste intensifier?
@HariPrasad https://drive.google.com/file/d/0B53os7BTst5lVlBvWFRRZWFta1E/view?usp=sharing
https://drive.google.com/file/d/0B53os7BTst5lMTdvSmVGRy1UU3M/view?usp=sharing
@ACuriousMind what's the German equivalent for "shitload"
Intensifier is a linguistic term (but not a proper lexical category) for a modifier that makes no contribution to the propositional meaning of a clause but serves to enhance and give additional emotional context to the word it modifies. Intensifiers are grammatical expletives, specifically expletive attributives (or, equivalently, attributive expletives or attributive-only expletives; they also qualify as expressive attributives), because they function as semantically vacuous filler. Characteristically, English draws intensifiers from a class of words called degree modifiers, words that quantify...
@BernardMeurer wow that's really cool
@0celo7 I don't think we have one
18:48
"Example : -ass, as in "a sweet-ass ride""
heheh
"Use of an intensifier subtly suggests to the reader what emotion he should feel. By naming an emotion within the predicate, the writer compels the reader to consider this emotion and hence he begins to feel it."
@Kyle it is about time.
What is the emotion associated with a lot of butter
I hope it is deliciousness
@HariPrasad :)
Wait for two years until chemistry gets to the age of physics, and see how much additional crap we get.
@ACuriousMind there's a Dönderladen in town, can't wait till I get a car and can go to it
18:50
@0celo7 @Slereah Indefinite and fictitious numbers : "metric shitload", "fuckton" :D
a metric fuckton is a whole lotta shit
@0celo7 lol lol lol
How many metric fucktons are in an imperial fuckton?
@Slereah no European units allowed here
There was a petition in congress over here to change the unit mole to "fuckton"
I signed it
18:54
@ACuriousMind @Slereah just got a .6 L soda from a machine.
The USA is amazing
Do you pee patriotically as well
From your distended bladder
Ah...Pepsi.
Diet.
Of course.
Why chase the 1300 cal lunch with real soda, that's just overkill
@ACuriousMind About to take a PDE test, wish luck
And if I ask any PDE questions in the next hour I'm in the bathroom
Life must have been pretty tough in the pre-industrial era
19:03
And you should answer me
Food with mostly no fat, no sugar, no salt, no spice and no fruits
Fucking bread and sauerkraut
The Egyptian worker's lunch was like
Bread, onions, cucumber, and beer
At least the beer was there!
Tho I think it was pretty shitty beer by modern standards
@Slereah Is beer alcoholic?
What kind of question is that
19:05
I don't think it was very alcoholic back then
"Is the sky blue"
But yes, somewhat
just to build up my knowledge
It took a while for people to invent good fermentation techniques
Breeding decent yeast and all
IIRC people didn't really know about yeast until like
the 15th century or so
Also we've had distillation since the 2nd century at least and yet no liquor until the late middle ages!
Did the first ever bread contained yeast?
19:07
First ever, maybe not
Hard to know though
Food doesn't preserve all that well
Anyone like Justin Beiber?
"One of the oldest sourdough breads dates from 3700 BCE and was excavated in Switzerland, but the origin of sourdough fermentation likely relates to the origin of agriculture in the Fertile Crescent several thousand years earlier... Bread production relied on the use of sourdough as a leavening agent for most of human history; the use of baker's yeast as a leavening agent dates back less than 150 years.""
I never actually listened to Justin Bieber, so who knows
It's probably just the usual generic pop music
Nothing good but nothing to get up in arms about
what is your favourite song out there? give a youtube link
@Slereah How old are you?
19:12
I am Radovan Karadzic
My favorite song
Boney M's pretty good
Also have some mongolian metal
@Slereah awesome
19:16
It's a good song to invade central Asia by
A superb rocking fantastic song:
like it? heard it before?
@Slereah what is it? ican't understand
19:22
It is a music
@Slereah But weird
how to ping someone?
Just write their name with an @ in front
@Slereah now is there any way to remove all thes songs from chat?
Why
Are you shamed
no it just doesn't suit here on physics.SE
@Slereah where are you from? Russia?
19:27
Do you want to talk about nonlinear Klein Gordon instead
No
France
@Slereah yes
So anyway
What does it mean for a nonlinear PDE to be "solved", anyway
Does it mean that, for any initial conditions, there is a solution available?
Is that the case with the KdV equation, for instance
Is that what the soliton solutions are like
Or are they just specific solutions
@Slereah I don't know
@Slereah For any initial conditions there cannot be always a solution
Well I'm talking about a physical PDE
So for any reasonable initial conditions there's always a Cauchy development
@Slereah what time is it in your place?
19:33
9:30 PM
its 1:30 early morning here
i've been sitting in front of my pc for the past 12-14 hours
Also I'm not in France currently
@Slereah in USA?
Nope
Lapland
@Slereah Norway?
19:35
Finland
Is it snowing outside?
No, but there is a pretty thick layer of snow
@Slereah Here its really hot and humid
I love snow
HOw many different types of snowflakes are out there?
It's alright
Every snowflake is unique, doncha know~
I do like that this place has actual snowflakes
@Slereah I didn't know that. THanks
19:37
Not like those half melted bullshit ones we get in Paris
You can totally see the crystalline structure
@Slereah Really?
@Slereah I have never been to Europe
Paris isn't a very snowy place
@Slereah Ever visited Belgium?
Where are you at?
I used to live right next to Belgium
19:40
So yeah
I have my cousin in Belgium
It's an alright place
Good waffles and fries :p
and chocolates
Hello. I'm trying to decide whether the following problem is more appropriate for Physics.SE or for Math.SE.
And chocolate waffles
user116211
19:43
@HariPrasad Ha Ha! Me too ;)
I start with a spin-$S$ state with $s_z=S$. Suppose I make a measurement of $s_x$ followed by a measurement of $s_y$, and then repeat this ad infinitum. What are the probability distributions for the resulting sequences $\{s_x\},\{s_y\}$?
@Slereah What's your favorite french cousine?
Physics SE is appropriate
I do not particularly have favorite cousins
@Slereah sorry cuisines (food)
Mmkay. I wasn't sure since 1) while it's not a HW question, I can imagine someone reading it as such, and 2) it's a calculation question not a conceptual question
19:45
@Semiclassical How is that not just 1/2 for +/- for each? Measuring x-spin collapses into an x eigenstate, and each x-eigenstate has 1/2 half to measure each of the y-spins, and vice versa
Well me I like meat :V
Steak and fries
A staple of northern France cuisine
Also crepes are good
@ACuriousMind it's a spin-S state, not a spin-1/2 state
user116211
@HariPrasad: Followed the warm-up match of Ind?
@Slereah who invented french fries
the example I had in mind in particular was a hydrogen atom with orbital angular momentum L=2
19:46
Who knows
user116211
@JohnDuffield: Welcome!
Check Wikipedia I guess
@user36790 sorry i don't like cricket
user116211
@HariPrasad WTF!
@user36790 haha i like football
user116211
19:47
@HariPrasad Damn!
@user36790 dude are you not sleeping yet?
its 1:15
@Semiclassical Ah, I see. I think this is borderline homework-like, and I would close it as I don't see the physical relevance of doing this
user116211
@HariPrasad I'm insomniac.
@user36790 me too
user116211
@HariPrasad Seriously, no. I generally sleep at 3:30 am
19:48
@user36790 why thank you, user. Is there anything you'd like to talk about?
user116211
@JohnDuffield Do you follow sports?
@ACuriousMind hence my concern. the physical motivation is that said distribution should be concentrated along some circle in $(s_x,s_y)$ space
@JohnDuffield GR maybe?
@Semiclassical No, I mean, why should a physicist care about this distribution?
@user36790 : not specially. I watch Match of the Day sometimes, and I'm a half-hearted Man City supporter from way back because my Uncle Bert took me to see them at Maine Road when I was a kid.
user116211
19:50
@JohnDuffield oh.
@HariPrasad : sure. I consider myself an amateur "relativist".
well, this started as a quiz problem. so it's definitely somewhat contrived.
You fools
Do not say his accursed name
You do not know what evil you are unleashing
user116211
@Slereah: calm down.
user116211
@Slereah: You are still unanswered; Math SE is troll.
19:53
ideally it should illustrate that, though $s_x$ and $s_y$ can't be known at the same time, their distribution is not arbitrary
@JohnDuffield Can you talk about the the absence of singularities outside event horizons.
My face currently :
user116211
@Slereah Let him face.....
user116211
I would go with the facepalm of Piccard ;/
@HariPrasad : yes. And I can talk about the absence of singularities within event horizons.
19:54
@JohnDuffield are you there?
but in any case it's really more of a calculation at this point than a physical example. so i do lean back towards my stomping ground at MSE. @ACuriousMind
@Semiclassical Hm, okay. You can try to ask it here, but I'd say that is off-topic. I'm one of the people who take the policy quite strict, though
@JohnDuffield so are there naked singularities within event horizon?
19:56
if i were to adapt it for here, I'd probably want to relate it to something like (for example) applications to magnetic molecules with large spin and the expected distributions.
A picard facepalm cannot express this evil
I will have to go full Picard possessed by Sarek
@Slereah lol why so much rage?
okay, thanks for the advice. @ACuriousMind
19:58
@Semiclassical no problem, it's more fun than having to watch the rest of the madness here :P
@0celo7 join me and @JohnDuffield we can talk on naked singularities
@HariPrasad Yes, I'm still on the development team though I don't do that much these days. I wrote the keyboard handling code.
@JohnRennie that's really cool
It was good fun :-)
I use Kodi as my media centre, running on a Mac Mini connected to my TV.
@JohnRennie So you are highly multi talented
19:59
@ACuriousMind I forgot a sine orthogonality relation -.-
had to do integrals

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