I am currently writing a clear account of what "smooth on the boundary" means

There are two definitions, and the fact that they are equivalent is folklore

Does anybody know what this banner is?

From biology.stackexchange.com/a/62534/30250

@EmilioPisanty It's a standard mod-applied banner, I think, mostly meant for use on Skeptics although it is available network-wide AFAIK

@DavidZ ok, cool

thanks =)

np

BTW I mean "standard" only in the sense that it's one of the default post notice options available to moderators on all sites

I don't think we ever use it here

Why is energy released when we add an electron to an atom?

I understand that energy is required to remove an electron from an isolates gaseous atom, but why is there release of energy while addition of electron to it and why does higher electron gain enthalpy imply higher affinity for electrons?

(Since I am watching the dark Knight now.. ) Good mo-rning, ladies and gentlemen

@Abcd that's not true. Energy isn't always released when electron is added to an atom

@Abcd It is released only if after you add an electron, the atom becomes stable..

@Kaumudi.H Whaaa... You haven't watched "Dark Knight?" The Dark Knight?

Chris Nolan's trilogy is very good

batman is mostly recognized as a vigilante than a hero

but w/e

The Dark Knight grossed more than a billion dollars during the time of recession I think..

@Sid I know it's not true for Nitrogen, Beryllium, etc. , but why is it released or not released?

@Abcd Anyway, if after adding an electron, the atom becomes more stable, then, Energy is released(since, stable states have very low Energy)

@Sid Did you understand all this in 11th or later?

You will understand things better when you apply these basics in 12th..

Don't worry now. Keep calm.

@Sid For example, you studied chemical bonding in 11th and many "Why's" populated your head. How did you deal with them?

@Sid I'll try.

I searched google. :)

Also, you can always ask your teachers for clarification of doubts..

yes, right.

I was going down the movie reviews rabbit hole a few days ago

I somehow ended up going to a worse rabbit hole : youtube.com/…

i dunno exactly how it happened

nnnever again

but i watched a lot of slavoj zizek reviews before that shit got real so there's that

@Kaumudi.H Morning (slightly belatedly)

eh, once you're in the rabbithole it's hard to get out

i only watch interviews, opinions of some of the people i like (eg slavoj zizek reviews) and shitposts

@Kaumudi.H A bit of a pain, but presumably you could scout out the hostel at the same time to see what you'll need to bring with you.

You're going to get very used to that bus journey over the next few years :-(

Remind me when term starts. August wasn't it? Why do they need you to come to the college now?

I bet, when you get there, they'll say there's some obscure document you should have brought with you ... and it'll be back on the bus again

oh great i'm on that instant regret list again

well, shit

it has. i just go 3 days a week

Isn't there a 75% attendance policy or something?

sure

3 days a week=50%, right?

i think we're told to maintain a 60%

officially a 75%, sure, but hey who cares

Neither were we. Those who missed school, their parents were contacted by the authorities and they had to reach school within 30 minutes of being contacted..

harsh

lol. We used to laugh whenever any teacher threatened us with practical marks

i have 2 lab days, because no biology

so i just go an extra day and i'm done

holy shit, that's a baby wheel

i didn't take CS either

it's statistics for me

CBSE CS is one of the worst courses that they could give..

nah, WBCHSE

or whatever that's called

i think one of the reasons i did not go to an eng med school is because ICSE and CBSE have oppressive and totalitarian education policies

being a Marxist, i plan to destroy that

You don't like programming?

I just don't know anything about it.

revolution

We learnt more in 10th ICSE than students of CBSE CS do till their 12th..

There's a lot of memorization in stats compared to CS.

whitehouse has the ability to create jaypegs

:(

Though, I need to brush up my programming stuff a bit. I have somewhat forgotten some of the Java stuff I did.

Ok, this is pure art now.

@Kaumudi.H You were CBSE till 12th?

No offence but, CBSE students don't read even half of what ICSE students do till Class 10th.

Cya

In ΛCDM, can I travel to a galaxy outside our local galaxy group and wait there long enough that I will never be able to return to my home galaxy group, due to universe expansion?

@ACuriousMind Do the previous games fully explain the story or does one have to read the books? The wiki is terrible

Unlike the ol TES wiki

I'm trying to figure out if I'm interpreting these diagrams like e.g. here correct: physics.stackexchange.com/questions/60519/… i.e. that I can travel arbitrarily close to what is (currently) the edge of the event horizon (which currently extends outside our local group) and then that I can wait there long enough to see my old home absorbed into my (new?) event horizon.

Is Grigori Perelman a wizard

Nope, just a whizz at math.

@Slereah looks like a dark sorcerer to me

he looks like a magic man

He's gonna trick someone in the woods

he def looks like a wizard

so does gromov actually

He has that trickster wizard smile

You have to solve one of his riddle or you'll turn into a newt

(The riddle is the Riemann hypothesis)

Riddle me this, mathman!

As if he's holding is magic stick

Gromov looks more like an academical wizard

in a wizard tower

@Slereah yeah i think the difference is this: Perelman is an evil wizard

Well, not evil

Just a trickster wizard of old

Hm, who looks like an evil wizard

Cedric Villani is more like a magic man

not an old wizard but a magic man

How does not wanting a million dollars make you "evil?"

Wizards have no need of your earthly riches

Someone should take a Gandalf and Saruman picture and photoshop Gromov and Perelman's faces in there

he has unlimited power

Hey, the names even rhyme!

The money goes to charity.

Boltzmann looks mildly evil

But more in a supervillain way

Like he has hypnotic powers

and he's gonna rob banks with it

Oh, I know of a superevil

Boltzmann looks like a mad mage

Legendre is definitely very very twisted

he does look fairly evil here

Like a man out of hell

He's downright satanic rage there

His air aloft with evil power

Da raiders are known in sports as "the evil empire."

That's why we have Darth Raider as our leader.

Here is Sylvester, of the famed Sylvester matrix laws

He looks like Darwin.

fairly calm eyes

like an archmage

the face of amphetamines

high as fuk

He came up with 5 theorems just now

AH. HERE HE IS

Alexander Grothendieck is da wizard

Is that a KKK hood?

The Grand Wizard.

Definately evil

Someone is getting sacrificed

This is the man

Have you met him?

Do we know for sure yet if inter-universal Teichmuller theory is real or if it's an elaborate scam

A friend of mine is applying to be a master student of his

@Slereah There have been conferences going on with some top number theorists to decipher his proof

He does look mildly evil too

but that's just his expression

Good morning @JohnRennie

he looks like Tom Riddle

Fritz Zwicky doesn't look evil but you're getting a piece of his mind

that eyes tho

not evil but twisted for sure

He's this close to kicking your ass

lel

Close enough?

Defining a clock in GR is not fun

Defining time is not fun.

Hm, I guess that if the spacetime admits a temporal function, I can define this for the entire spacetime

This is just the bohr model, not modern quantum mechanics!

and even babies know the 1s orbital is peaked inside the nucleus

Also there is no maximal orbital energy

The upper bound is a free electron

indeed indeed

At least in three dimensions

(in two dimensions there is no ionization energy)

you get arbitrarily large orbitals

because $E$ field is constant wrt distance in 2D instead of inverse square law like in 3D?

Well it's not constant

It's $r^{-1}$ instead of $r^{-2}$

This causes a two body problem to not have any state of positive energy

I see. Hmm, I guess for 1D we don't even have bound states since E is constant wrt r?

@Kaumudi.H Aha, you got lucky in the ticket lottery!

What are you taking with you to read on the train?

Do they have wifi?

:(

@Kaumudi.H Apparently, food will also be served - the bad news is that it's sambar and rice :-)

How long is the trip going to take?

:O

Wow, I've just Googled Room and it doesn't look like a barrel of laughs ...

Read Finnegans Wake

How to solve this question?

It's hard to die twice

Not for James Bond

I also know that the Ionisation Energy of He^2+ = 54.4 (calculated using a formula because it's a hydrogen like specie)

what a shame

@JohnRennie or anyone?

it's a disgrace. i refuse to suggest you further rAeDiNg material from now on

(that's a threat? really?)

-_-

@Abcd The first ionisation energy is the energy required for the process $He \rightarrow He^+$, and the second ionisation energy is the energy required for the process $He^+ \rightarrow He^{2+}$. Add them together and you get energy required for $He \rightarrow He^{2+}$.

@JohnRennie Yes I know that but we need energy for $He^{2+}$ to He, is it the same?

tbh you should not want to try to read it anywhere ever

unless you're effed in the head like me

@Abcd The processes $He \rightarrow He^{2+}$ and $He^{2+} \rightarrow He$ are the same process in reverse. So the energy changes involved have to be equal and opposite.

@Kaumudi.H speak for yourself ...

@JohnRennie Alright. I got confused thinking that it had something to do with Electron Gain Enthalpy

chartrain.org/PDF/Finnegans.pdf

I am the very model of sanity

Though I will concede that the rest of the universe is somewhat effed up :-)

@JohnRennie If that's the case, then EGE and IE should be numerically equal, am I right?

Can't you guys tell this is a marketing trick?

@Abcd yes, though electron affinity/electron gain enthalpy tends to be used for the combination of an electron and a neutral atom to form an anion.

beautiful

it's not a book per se. it's a nonsense verbal poetry mainly based on multi-level puns

@JohnRennie Thanks a lot, I didn't know that.

"bababadalgharaghtakamminarronnkonnbronntonnerronntuonnthunntrovarrhounawnskawnt‌​oohoohoordenenthurnuk" is actually an amalgamation of "thunder" in various languages

obviously one has to be a intergalactic supergenius to understand all the references

Practice

Yeah^

That particular line is referencing the fall of Adam and Eve on Earth, or something, I think

@0celo7 The first has nothing to do with this one's story, but the second is kinda a prelude to it. I think the character descriptions in the game menu do a decent job of explaining who is who if you don't know and/or remember them, though.

ofc not

I have been at it for a while :P

whatever "read" means

why not?

on the other hand you could die in it's pages

many Joycean scholars have

lost and never found

You need a good math book to keep you grounded.

@LasVegasRaiders I use a piece of wire to keep myself grounded ...

or that^

:-D

i need Brothers Karamazov

i do but it's too long

i read Crime and Punishment after my secondary examinations. i need one like that for this one

Brothers Karamazov is like hundreds of pages

on two volumes :3

I meant the novel in question. "Brothers Karamazov"

i should take up a project to read the most lengthy and complex fictions and films in history one day

"Satantango" is on my list of films

@JohnRennie I understood that Tl+ is more stable than Tl3+ due to inert pair effect but why is Ga3+ more stable than Ga+? Brief explanation would suffice.

i hear it's damn good

k, i have to run now

I ain't got time for that

Cya

Are tensor distributions defined on non-orientable manifolds?

If their support is the entire manifold

Since integration isn't well defined then

@Abcd no idea. That's chemistry rather than physics.

@JohnRennie Okay.

Well that was an easy max for the day. Don't you just love the HNQ list?

"Proof. (You should not read this proof the first time around)"

Nonlinear book

@ACuriousMind does this game hold the record for the longest mq?

@JohnRennie HNQ is the worst thing in SE unless I get rep from it. :P

@JohnRennie do you mean the zeroth law says you will equibriate at a constant temp?

I believe that is word for word the zeroth law, not the second

yeah, zeroth law said if A is equlibrium with B and B is in equlibrium with C, then A is in equlibrium with C and thus has the same temperature

put that in a more mathy way: the equlibrium relation is transitive

@Sid Yes! :-)

@0celo7 the zeroth law says equilibrium is transitive doesn't it?

@ACuriousMind I want to read the books but there's like nine of them and thousands of pages

@JohnRennie maybe; does the second law say equilibrium happens at constant temperature?

@0celo7 The second law says heat flows from hot objects to cold ones. Well, one of the many ways of phrasing the second law says that.

I'll need to see a proof.

@JohnRennie I ordered thermal paste and a fan cable. I have a feeling my water cooler should be cooling better than a stock fan...

@JohnRennie I thought the second law is that entropy increases

@Kenshin you can blame entropy for anything and you might be right

@0celo7 it will do no harm to redo the thermal paste, though I doubt you'll see any difference. Just don't break anything unclipping the cooling system :-)

@JohnRennie But I'm not using the right fan for the radiator

I stuck a case fan on there because the good Corsair fan didn't come with a long cable

It's conceivable the airflow isn't optimal

I don't know about AMD processors, but Intel CPUs are safe up to 90C. The i7-3540M CPU on this laptop regularly runs up to the mid 70s and higher if I'm really hammering it. Bernardo claims to have got his i7-3740QM CPU up to 100C.

So your CPU temp seems perfectly normal.

@JohnRennie Ok, but I'm at 80C when at full blast. I have a water cooler, I should be able to overclock.

The point being that I don't want normal, I have a water cooler.

If you aren't using the fan supplied with your cooler then getting the right power cable and using the proper fan does seem a good idea. I'd try that first and see what difference it makes before you go changing the thermal paste.

Aight

Once a CPU is installed, and the heat sink attached I'm always a bit reluctant to mess with it because the heat sink clips can be quite tight. I'm always nervous of breaking something trying to get the heat sink off.

@0celo7 It's one of the longest I've played, at least