The h Bar

Sir Cumference

5:17 PM

Morning...

ooolb

@SirCumference bitch you keep saying hi and not replying

CooperCape

Why have I now got 3 emails from Manchester saying I won't be 18 by the time I go to university... Like calm down lads hardly like I haven't noticed.

ooolb

@CooperCape this is an adult chat

CooperCape

Sue me.

Or ban me whatevs

Take your pick.

John Rennie

As long as you're over 13 that's fine :-)

ooolb

5:23 PM

adult only since '15

Oct 19 '15 at 4:00, by 0celo7

this is an adult room now

@JR ban him

John Rennie

More precisely, as long as you don't tell us you're under 13 we don't care.

Anonymous

@CooperCape Are there age restrictions to go to uni? That's so strange

Balarka Sen

i am 13

CooperCape

@Blue No you just gotta get parent to sign forms and stuff... Make sure I don't do naughty adult things before I'm an adult (like drinking - that's mentioned soooo many times)

John Rennie

@ooolb since making jokes about testicles is most definitely not adult behaviour I would also have to immediately ban myself.

Balarka Sen

5:24 PM

looool

ooolb

@JohnRennie do it

John Rennie

I'm not sure I can. I could try i suppose ...

ooolb

that's the physicist spirit.

CooperCape

Well so that's the third useless pdf saying "Yeah it's fine lol"

Anonymous

You can always take tips from @0celo7 on how to get banned :P He's an expert :D

CooperCape

5:26 PM

I've got banned twice.... :/

John Rennie

@ooolb it appears I cannot ban myself. If I click (for example) your avatar I get a popup menu:

ooolb

hey that's me

John Rennie

The kick mute option is the nearest I come to being able to ban someone.

ooolb

try me

i'm a performancer

John Rennie

But when I click my own avatar there is no kick mute option.

Anonymous

5:30 PM

Obviously. No normie developer would put in a self-kick-mute option. :P

CooperCape

To be honest if I could sometimes I would so I actually do some work for once.

Balarka Sen

just do it

just shia labeouf it

ooolb

✓

John Rennie

@Blue I would always add the option for users to commit computerised suicide, if only so I could laugh at them when they phone the support line :-)

Abcd

@JohnRennie Can you tell me how $\dfrac{d^2\theta}{dt^2}= -\omega^2\theta$

ooolb

5:33 PM

@JohnRennie some men just want to watch the world burn

Balarka Sen

- Manbat

John Rennie

@Abcd are you asking me how we know the coefficient on the right is $\omega^2$?

Or how the equation is derived?

Bernardo Meurer

THERE IS NO SYSTEM BUT GNU AND LINUX IS ONE OF ITS KERNELS

Anonymous

@BernardoMeurer Eat some ice

Anonymous

Cool down :P

Bernardo Meurer

5:37 PM

It had been a while

I was itching

ooolb

@BernardoMeurer is that what computer dorks say when converting to freedom

Balarka Sen

GNUs of the world, unite!

Abcd

@JohnRennie I want to know the derivation.

Bernardo Meurer

@ooolb It's what my girlfriend whispers in my ear when I'm nuttin

ooolb

damn

that aint christian

Bernardo Meurer

5:40 PM

Yes it is

It's free software

Balarka Sen

tmi

ooolb

what would jesus do

John Rennie

@Abcd the derivation depends on the physical system being studied. Since you use $\theta$ I'd guess you're thinking about a pendulum, where $\theta$ is the angle of the string. In that case it's just a matter of calculating the forces on the bob and showing that the torque is proportional to $-\theta$.

Bernardo Meurer

@BalarkaSen I also tell her to read me each clause of the GPL softly in my ear

John Rennie

@Abcd I can do this if you want, but it's a very standard problem that you'll find all over the Internet.

Balarka Sen

5:43 PM

you might be the only person in the world who is sexually aroused by fantasizing about Linux

Abcd

@JohnRennie I searched,couldn't find.

ooolb

@BalarkaSen nah it's just right

we keep it real in the h bar

John Rennie

@Abcd OK, let's switch to the problem solving room, and I'll draw a diagram to show how it's done ...

Abcd

Ok

John Rennie

@BalarkaSen no sex please, we're physicists.

2

ooolb

5:45 PM

@JohnRennie back in the day physicists had more play than movie stars

Anonymous

@JohnRennie That's a very weird reason XD

Balarka Sen

@JohnRennie Given that you are the academic descendants of Richard Feynman I call that line of logic trash

Anonymous

@BalarkaSen Come up with a new word for such people!

ooolb

@JohnRennie you just set yourself up for some old quotes

Anonymous

@BalarkaSen Feynman was fake

ooolb

5:47 PM

May 5 '15 at 16:03, by John Rennie

Sex, drugs and rock and roll of course

May 5 '15 at 16:03, by John Rennie

In other words, everyday life for physicists :-)

John Rennie

@Blue Play on words

ooolb

hmmm

Bernardo Meurer

@BalarkaSen I think you meant GNU/Linux

Anonymous

@JohnRennie lol

Balarka Sen

@Blue GNUphilia...?

I don't even know

Anonymous

5:49 PM

libresexual

Anonymous

Free software

Free software or libre software is computer software distributed under terms that allow users to run the software for any purpose as well as to study, change, and distribute it and any adapted versions. Free software is a matter of liberty, not price: users —individually or in cooperation with computer programmers— are free to do what they want with their copies of a free software (including profiting from them) regardless of how much is paid to obtain the program. Computer programs are deemed free insofar as they give users (not just the developer) ultimate control over the first, thereby allowing...

Sir Cumference

@Blue Looks like Bernardo got hold of Blue's computer

Anonymous

@SirCumference I'm thinking of words to describe Bernardo's species

Sir Cumference

@Blue Oh, probably should've gotten the context XD

Balarka Sen

@Bernardo Meanwhile, I have been thinking about some Rick & Morty level induction problems if you're interested

Sir Cumference

5:53 PM

@ooolb Oh. How are you

ooolb

blue

Sir Cumference

@ooolb Good blue or bad blue?

ooolb

every blue is good blue

except @Blue

Balarka Sen

da ba dee da ba die da ba dee da ba die etc

Anonymous

@ooolb Yeah, I know good isn't good enough to describe me ;)

ooolb

5:59 PM

@BalarkaSen da*

@Blue @BalarkaSen math squad i'm looking at you

that statement doesn't make sense

where ya at

John Rennie

→ 1 message moved to trash

@ooolb: don't do that again

ooolb

do what?

John Rennie

Make homophobic posts

ooolb

where?

CooperCape

Oh wow if that was bad then I definitely deserve my bans holy moly.

ooolb

6:06 PM

idk what y'all are on

i never said anything homophobic

CooperCape

View the message JR moved to trash.

ooolb

that's a genus

John Rennie

@ooolb don't take the piss. I'm not a huge fan of the big ban boot, but posting homophobic material then pretending it wasn'twill attract the attention of moderators bigger and badder than me.

CooperCape

shogshogshog

ooolb

you dunno me

Sid

6:09 PM

@JohnRennie since when are you a mod?

I thought you were an RO

Balarka Sen

He's not a mod, indeed. But he can kick-mute users and move messages

Semi-mod of the specific room sorta

Sid

@BalarkaSen that's what an RO does

Balarka Sen

Yes, indeed.

Sid

@JohnRennie do you get extra privileges with your rep?

Balarka Sen

I don't understand what made you think he's a mod

Sir Cumference

6:11 PM

At 100k rep, users should just be given moderator privileges.

ACuriousMind

@SirCumference Hahahahahahahaha...no.

6

Balarka Sen

lmao

Sir Cumference

I mean, only two or three dozen people on the entire SE network are that committed to sites

@ACuriousMind Glad to hear a normal debate

Sid

@SirCumference you get mod tools at 25k if I am not wrong

Sir Cumference

@Sid Nope

Balarka Sen

6:12 PM

Well, the first thing that comes to mind is that you're imposing moderation privileges on users

Sir Cumference

You get some of them, and they can be overridden by a single moderator. E.g. users with >25k rep can't vote to undelete a post deleted by a mod.

Balarka Sen

Second this is that rep count doesn't have much to do with how committed you are to moderating/maintaining the site

Sir Cumference

Also, mods can delete posts without any votes, etc.

Balarka Sen

There are just super obvious rebukes to your proposal

Sir Cumference

@BalarkaSen The entire privilege system is based on the contrary...

Kaumudi. H

6:14 PM

@JohnRennie DON'T JINX IT

ACuriousMind

@SirCumference Being a high-rep user doesn't necessarily mean you are remotely fit to moderate. There are multiple instances of high-rep users (yes, in the 100k range) on the SE network that are definitely not moderator material. And no, I won't give examples :P

John Rennie

You certainly wouldn't want to give irresponsible lunatics like me moderatorial powers :-)

3

@Kaumudi.H Sorry :-)

@Kaumudi.H by the way I got my new bicycle.

Sir Cumference

@Kaumudi.H That moment when you're in the middle of an SR exam and you realize classical mechanics is wrong...

Anonymous

@JohnRennie PHOTO!!!

Kaumudi. H

^^^

John Rennie

6:15 PM

Ooops...

Kaumudi. H

x'D Hahaha.

John Rennie

Anonymous

Damn, again you are out of the frame :P

Anonymous

Nice bike! :)

Kaumudi. H

Naice! :-D

Is it comfortable?

Anonymous

6:16 PM

That rear hanging part looks a bit weird though

John Rennie

It's actually quite a cheap bicycle. Since I only use it for riding to the shops there was no point in getting a posh bike.

Kaumudi. H

Right, right.

enumaris

always a point to getting a posh bike

super low rider

ride around like a boss

John Rennie

@Blue yes ... that's the silly rear mudguard. Not a design I think is very good, but that what the bike came with.

I suppose it's better than nothing.

Emilio Pisanty

@JohnRennie you're too British to be a lunatic

John Rennie

6:18 PM

@EmilioPisanty We Brits have a long and noble history of eccentricity

CooperCape

0.0167

Emilio Pisanty

@JohnRennie eccentric and lunatic are nowhere near the same thing

John Rennie

My favourite is the guy who decided, for no very good reason, to walk from Edinburgh to London stark naked.

Sid

@JohnRennie ...what?

Balarka Sen

Sophus Lie used to take off his clothes while hiking in a raining day

CooperCape

6:21 PM

Oooh I remember a classic newspaper title that was something along the lines of "This man will smell your bike seat"

Balarka Sen

He got arrested in the Italian borders in the midst of one of his hiking trips on the grounds of being a suspected spy

John Rennie

:41581066 Ah, it's Chester in the US not my home town of Chester. Thanks god for that :-)

Anonymous

@JohnRennie Yeah, just realized. :'D

Kaumudi. H

@JohnR: Are you still around?

Phase

@JohnRennie I think the "Homophobia" condition there was extremely weak, re Ooolb's

Abcd

6:31 PM

Why was Blue banned?

Anonymous

@Phase What?

Phase

Not that blue

Anonymous

Too much blue here...

John Rennie

@Phase I haven't banned anyone and I don't intend to ban anyone. I was just firing a warning shot.

Kaumudi. H

@JOHNR: ?!

Phase

6:32 PM

30 minute chatban

I didn't mean to imply perma

Anonymous

chat.stackexchange.com/users/289870/ooolb

Anonymous

I didn't even know he was chat banned

Balarka Sen

@Phase JR can't chat-ban

It was a flag ban

John Rennie

Ah. I didn't ban ooolb, but I guess he did indeed attract the attention of a moderator bigger and badder than me.

Phase

Oh, apologies then

Abcd

6:33 PM

@Phase which blue?

Anonymous

@Abcd chat.stackexchange.com/users/289870/ooolb

Kaumudi. H

JOHN, HALP!

Balarka Sen

Also he didn't get banned for the "homo homo homo" message (which is not homophobic per se, but a childish attempt at humor at best). The message which got him banned, based on my observation of which message got deleted from the chat transcript, is his "I'm not homophobic idiot" comment to JR

0celo7

That got him banned?

Balarka Sen

Which is kinda annoying and rude

0celo7

6:35 PM

What the heck is this chat coming to

Is there a comma missing in that sentence? I can’t quite parse it.

Balarka Sen

If you're calling people idiot I have no sympathy for you

0celo7

There’s either a comma or an “a” missing. The content depends strongly on which.

Balarka Sen

Then it's his fault entirely to not make that clear :P

0celo7

Either he’s calling JR an idiot or homophobes idiots.

Balarka Sen

I have no sympathy for getting yourself banned based on vague commentary

Sid

6:38 PM

@0celo7 both of which are rude and annoying...

John Rennie

Am I missing something here? Making any joke that refers to people's sexuality is always going to be edgy. Just don't do it in polite company.

0celo7

I agree with JR.

John Rennie

For heavens sake, who flagged that?

Balarka Sen

Jesus

What the flicker

Sid

What on earth?

John Rennie

6:40 PM

@ACuriousMind you around? We just got an invalid suspension.

Anonymous

Just avoid calling people idiots (even homophobes). Saves you from trouble. (To be clear, I didn't flag that)

Balarka Sen

That was clearly not a legitimate flag.

John Rennie

For the record, whoever flagged that, homophobia is bigotted, small minded and stupid behaviour and Ryan was quite correct to call homophobes idiots.

Phase

I don't think it's particularly "rude" to call Homophobes idiots. I think anyone who has such a strong opinion about what irrelevant consenting adults do has something wrong with them

Yeah, exactly.

Balarka Sen

I agree.

HyperNeutrino

6:43 PM

Something happened here? In general, try to respect Stack Exchange's general Be Nice policy which applies to all cases, even when the other person is disrespecting it; it saves you a lot of trouble. That being said, I tried to counterflag it (but I was a few seconds too slow), and I do agree with the point, just try to uphold the BNBR policy to avoid trouble.

ACuriousMind

@JohnRennie I'm around. Just for the record, don't call people idiots even when it's true, though I've reversed the suspension.

Anonymous

@JohnRennie Do you realize that homophobia can be a behaviour deep engraved in some people that they cannot change it, even if they wish to? It's a "phobia"

Phase

@Blue no

well, yeah

But it's not a fear

The "phobia" is quite leniently used

No-one is having panic attacks at the sight of gay Roger the campy nextdoor neighbour

Balarka Sen

@Blue The act of homophobia is so far graver than the act of calling a generic person an idiot, the latter becomes kinda infinitisimal.

0celo7

@ACuriousMind Thanks and noted.

Anonymous

6:46 PM

@BalarkaSen Okay, anyhow, I was just telling him to avoid posting controversial stuff

Anonymous

I didn't flag that anyway

Loong

@ACuriousMind You did not.

Anonymous

But different people can take it to mean different things

Balarka Sen

@Blue I can agree with that.

Phase

@Blue what does that even mean

ACuriousMind

6:47 PM

@Loong Heh

I clicked the button, though :P

0celo7

@Loong thanks?

Abcd

Has anyone here seen Simple Harmonic Motion in nature? If yes, could you give me an example?

0celo7

@Abcd crystals

Loong

@ACuriousMind FGITW

Abcd

@0celo7 which crystals??

CooperCape

6:48 PM

ohai

what up pimps

Bernardo Meurer

@ACuriousMind Can you read the GPL to me while I ... nevermind

Balarka Sen

Perfect SHM? Surely not, every dynamical system in nature is acted on by so many natural forces that the flowlines becomes quite fractal-like on small-scales.

0celo7

@ACuriousMind 24 hours is a bit much, no?

Balarka Sen

But there surely are systems well approximated by SHMs

Bernardo Meurer

@BalarkaSen Gimme those induction proofs

Abcd

6:50 PM

@BalarkaSen You could give me an example of SHM in nature when small angle approximation is used, it'll be fine.

Balarka Sen

@BernardoMeurer so, so, let's see.poof that

0celo7

@Abcd the Einstein model of crystals uses SHM, IIRC

Abcd

Please give a high school level example xD.

CooperCape

@0celo7 Yeah I had a question on that earlier today to do with natural frequency

John Rennie

@Abcd the Tacoma Narrows bridge

0celo7

6:51 PM

Nature @JohnRennie

CooperCape

My aeronautical engineering gf says Tacoma Narrows Bridge at least 7 times a day I swear.

Phase

@Abcd Car Suspension I think

CooperCape

Had a question on car suspension earlier today as well...

0celo7

NATURE

John Rennie

@abcd sound waves!

Abcd

6:54 PM

@JohnRennie we don't seem them :/

John Rennie

Water waves then

Abcd

that's SHM?

CooperCape

@JohnRennie If sound waves are then could shear waves be? Humans certainly feel them....

That's pretty nature-y as well

John Rennie

Good point. Earthquakes!!

Phase

@JohnRennie I thought water waves make points go in circular motion

Which I guess is SHM in two directions but eh

John Rennie

6:56 PM

@Phase if you measure the height of the water at a fixed point you'll get an approximately sinusoidal variation with time.

CooperCape

circular motion is like SHM but someone decided to make the $i\sin(\theta)$ part real...

I mean why not, right?

John Rennie

Quantum fields!

Abcd

@JohnRennie yes, that's a good example. The buildings are in SHM if I am not wrong.

Balarka Sen

@Bernardo Suppose you have a $2^n \times 2^n$ graphsheet of tiny squares. Cut out one square from it from anywhere on the graphsheet. Prove that you can tile deficient graphsheet by trominoes: shapes of this form -

Phase

@CooperCape when you do circular motion you keep the y axis imaginary if you're using complex numbers

Balarka Sen

6:58 PM

Phase

a lot of the time its convenient to make otherwise real axes be imaginary

John Rennie

Honestly, pretty much anything that vibrates is likely to be approximately simple harmonic at low amplitudes.

Abcd

A see saw ...

Bernardo Meurer

@BalarkaSen is it just to show that $2^{2n} - 1$ is a multiple of three?

0celo7

That’s not nature.

Just say motion of atoms in crystals

That’s middle school level

Balarka Sen

6:59 PM

@Bernardo Ah, cool guess. Is it?

Phase

Boltzmann Seesaw

Easy, now it's natural, just spontaneously is made

CooperCape

@Phase Won't lie imaginary stuff in physics confuses me cause half the time I'm like "Why is some part of something happening to the mass on this spring imaginary"

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