The h Bar

user685272

12:01 AM

You watch baseball?

user685272

12:20 AM

I see the home team won :-)

Dawood ibn Kareem

12:49 AM

@user685272 I think you'll find that China are using the same laws of physics as the rest of the world.

user685272

I realize that.

I didn't know it was free.

No offence intended

The Dark Side

2:29 AM

@0celo7 Nothing much, it was an old Daniel sank joke.

0celo7

5:10 AM

@BernardoMeurer AC Unity melts my GPU

:(

Abcd

5:45 AM

WHy do we have to take velocity negative while it's decelerating? I think it should be positive coz it's still moving in the positive direction.

John Rennie

The velocity isn't negative while the train is decelerating.

The acceleration is negative, if that's what you meant.

user228700

Hi, everyone :-)

John Rennie

Morning

Though everyone currently means you me and Abcd. It's quiet this morning.

user228700

Ah, hmm...

user228700

yesterday, by John Rennie

@Kaumudi.H I was wearing a mask!

John Rennie

5:57 AM

:-)

user228700

Were you really? :-)

0celo7

I'm here

Trying to figure out how a 3 year old game is destroying my mofo GPU

John Rennie

Like all superheroes I have to conceal my secret identity!

0celo7

@JohnRennie but I have seen your true face

user228700

@JohnRennie Laptop Man, wasn't it?

John Rennie

5:58 AM

@0celo7 The Unity engine in AC Unity is far from the best optimised piece of software in the world. I wouldn't conclude anything about your hardware from the poor performance of the game.

@Kaumudi.H :-)

Sid

Superman doesn't conceal his identity

0celo7

@JohnRennie the cutscenes are the bad part. Other than that I can run max settings modulo AA

John Rennie

@Kaumudi.H right now there aren't any laptops I want to buy - my life has lost it's meaning!

user228700

@JohnRennie Oh, no! :-(

0celo7

TXAA seems to wreck my system

John Rennie

6:03 AM

@Kaumudi.H It's an awful situation :-)

Sid

@JohnRennie Let me be very pedantic. Isn't that supposed to be "its" rather than "it's"?

John Rennie

Oops :)

Sid

6:19 AM

0

Q: the question is on kinematics

Preeti reached the metro station and found that the escalator was not working. She walked up the stationary escalator in time t1. On other days, if she remains stationary on the moving escalator, then the escalator takes her up in time t2. The time taken by her to walk up on the moving escalator ...

kinematics

Mod hammer that? ^

Avantgarde

Nice question

Sid

the meta-post says that HW questions should ideally have a conceptual question to answer. That question is just boring Math calculations.

Avantgarde

best kinds are when there's a scanned multiple choice question

"tell me the answer asap"

David Z

@Sid the way to get that handled is to flag it

Sid

@Avantgarde lol. It's like they have a time-bomb on their backs

user228700

6:41 AM

@JohnR: Ever heard of oothappam?

John Rennie

No?

user228700

John Rennie

Google, Google, this?

user228700

Breakfast! (At 12 :-/)

John Rennie

Uttapam

Uttapam or ooththappam or Uthappa (Tamil: ஊத்தாபம் ) is a dosa-like dish from South India made by cooking ingredients in a batter. Unlike a dosa, which is crisp and crepe-like, uttapam is a thick pancake, with toppings cooked right into the batter. == Preparation == Uttapam batter is made of a 1:3 ratio of vigna mungo and rice; the rice should be a combination of a boiled variety and a variety such as basmati. The lentils and rice are subsequently ground and fermented. The outer surface is crisp and the inner layers are like idli. Uttapam is traditionally made with toppings such as tomatoes, onion...

user228700

6:43 AM

Precisely!

Sid

I am just learning some secrets of SE..

John Rennie

That looks really good :-)

Though aren't a bit solid?

user228700

@JohnRennie Two oothappams with coconut chutney on top and podi on the side.

user228700

@JohnRennie They are, yep, which is why I'm having only two of 'em.

John Rennie

In the UK (and US) we have a thick type of pancake but it's made with a raising agent so it's fairly light like cake. In the UK we call them drop scones or Scotch pancakes. In the US I think they're just called pancakes.

Recipe here

user228700

6:46 AM

Ah, I see. Well, these have a filling of onions, tomatoes & curry leaves!

John Rennie

OK, so they aren't just solid batter.

user228700

Nope!

John Rennie

I'm out of ideas for today's lunch. I'll just wander round the supermarkets and see if anything looks tasty.

user228700

I had cheese stuffed panneer for starters last night!

John Rennie

@Kaumudi.H I though panneer was cheese ...

So you ate cheese stuffed with cheese :-)

user228700

6:52 AM

Really, anybody who says that vegetarian food is boring doesn't know what they're talking about.

user228700

@JohnRennie Essentially :-P

Sid

panneer=cottage cheese

(I think)

John Rennie

Paneer

Paneer (pronounced [pəniːr]) is a fresh cheese common in South Asia, especially in Indian, Pakistani, Afghan, Nepali, Sri Lankan, and Bangladeshi cuisines. It is an unaged, acid-set, non-melting farmer cheese or curd cheese made by curdling heated milk with lemon juice, vinegar, or any other food acids. Its crumbly and moist form is called chhena in eastern India and in Bangladesh. == Etymology and history == The word "paneer" is of Persian origin. The Turkish word peynir, the Persian word panir, the Azerbaijani word panir, and the Armenian word panir (պանիր), all derived from "paneer", refers...

user228700

Unlike most other cheeses though, raw paneer doesn't taste very good.

John Rennie

How can you stuff cheese with cheese - serious question e.g. were they different types of cheese?

user228700

6:53 AM

@JohnRennie Yep. I think it was mayo.

John Rennie

Ah, lumps of paneer with mayonnaise in the middle?

user228700

Yep! Panneer tikka.

John Rennie

That sounds a nice idea, though I'd be inclined to breadcrumb and fry them. Like a pakora but with breadcrumbs not batter.

So you'd have a crispy outside, then the soft cheese then mayonnaise in the centre.

user228700

Like this:

user228700

6:57 AM

It had mayo on the inside, yes.

Sid

Heh, Paneer Butter Masala is the best of all..

Tikka is just for starters

user228700

8 mins ago, by Kaumudi. H

I had cheese stuffed panneer for starters last night!

user228700

::Googles "How to make pomegranate juice?"::

user228700

As it happens, I have a small basket full of pomegranates at home.

John Rennie

That's such a waste of pomegranates!

Sid

7:02 AM

Though, I would say people outside India wouldn't really like these dishes. Because spices. Pretty sure, they would have an upset stomach within a week. :P

user228700

@JohnRennie Why?! :-o

John Rennie

@Sid Indian food is very popular in the UK

Sid

same spices too?

John Rennie

@Kaumudi.H I love pomegranates because I love the texture. When you bite you get that crunch then the sweetness as the juice flows over your tongue.

Put pomegranate juice is just another fruit juice.

user228700

@JohnRennie When I eventually visit the UK, I will definitely go to an Indian restaurant to try the Indian food served there and then I will tell you if they're similar to what we make here.

Sid

7:04 AM

Boo. In the end, it goes into the stomach and then is excreted out in the faeces.

Everything ends in the same above way

user228700

@JohnRennie Eh, I'm not that big a fan of eating pomegranates.

John Rennie

@Sid Indian food tends to be sweeter in the UK, and we always takes the bones out before cooking meat.

user228700

Making juice out of them is tricky though; I'e gotta make sure that I don't blend them too hard for then the juice will be bitter...

John Rennie

@Sid Apart from that it is reasonably similar to the food cooked in India, though the food served here is mainly from the North-West. A lot of the recipes Kaumudi has described I have never seen in the UK.

@Kaumudi.H I love eating fresh pomegranate! :-)

@Kaumudi.H presumably if you blend them too hard you start breaking up the seeds, and that's where the bitterness comes from?

user228700

Yep yep!

user228700

7:07 AM

user228700

Hey, this doesn't sound so terrible, does it?!

John Rennie

It's just that I love fresh pomegranate so much that blending it seems a waste.

Sid

I am really surprised no one in the West has ever tried eating with hands.

John Rennie

I don't think pomegranates have that much flavour. It's the texture that makes them so nice, and obviously you lose that when you blend them.

user228700

@Sid ^

0celo7

7:09 AM

@Sid wot

John Rennie

@0celo7 In India it's common to eat without using cutlery.

user228700

@JohnRennie I'm willing to give it a go anyway! As long as I'm just sitting around :-P

John Rennie

You use chapatis or similar to pick up the food.

0celo7

@JohnRennie I am horrified at the prospect of eating what I think of as Indian food without silveware

user228700

@JohnRennie Most of us eat rice also using our right hand.

0celo7

7:11 AM

@Kaumudi.H Savages.

John Rennie

@0celo7 I guess I'm used to it because where I grew up in the Sudan there was an Indian community and we frequently ate with them.

0celo7

You eat rice with your bare hand?

user228700

How the heck is one s'posed to mix curry with rice without the use of a hand?!

user228700

@0celo7 Most of the time, yeah.

0celo7

With a fucking spoon.

John Rennie

7:12 AM

@Kaumudi.H Huh? With a fork?

0celo7

Or fork.

Or a stick?

user228700

@0celo7 Oh, man, that wouldn't be nearly as great as mixing with your hand.

0celo7

Savages.

user228700

We do wash our hands before eating! What izz problem?

John Rennie

I don't eat with my hands because I'm usually eating at my computer and I don't want to cover the keyboard in food smears.

user228700

7:13 AM

@JohnRennie Indians use only their right hands to eat so if I am at the computer while eating, I painstakingly use my left hand to type.

0celo7

wtf

Sid

@0celo7 I have eaten with hands as well as with cutlery..

0celo7

are you telling me you scoop curry rice with your fingers

user228700

@0celo7 Uhh, yes, I am.

John Rennie

@0celo7: if you're eating an orange or a peach you'd use your hands not cutlery. Eating the main meal with your hands isn't that different.

0celo7

7:14 AM

@JohnRennie She eats curry rice with her hands

I don't see how my comment is not objectively correct

John Rennie

I have done that when eating with Indian friends.

0celo7

I believe the term was created for such situations

Sid

why is that supposed to be savage anyway?

John Rennie

Eating with your fingers is common in the Arabic world as well.

0celo7

So are car bombs

Sid

7:15 AM

I eat chapatis with hand. But, I sometimes eat Rice with spoon

when it is too hot..

user228700

This is what a typical meal at Kerala weddings looks like:

user228700

Eating with hands, off banana leaves, in India!

►

John Rennie

Finger food

Finger food is food meant to be eaten directly using the hands, in contrast to food eaten with a knife and fork, spoon, chopsticks, or other utensils. In some cultures, food is almost always eaten with the hands; for example, Ethiopian cuisine is eaten by rolling various dishes up in injera bread. In the South Asian subcontinent, food is traditionally always eaten with hands. Foods considered street foods are frequently, though not exclusively, finger foods. == Types == In the western world, finger foods are often either appetizers (hors d'oeuvres) or entree/main course items. In the Western world...

0celo7

@Kaumudi.H I have nothing good to say

I should leave

Sid

Eating chapatis with cutlery sounds too much work

I have no problem eating rice with cutlery though

John Rennie

7:16 AM

@0celo7 do you use cutlery when eating pizza?

0celo7

Of course.

Why would I want to get grease on my fingers?

user228700

@0celo7 Lol, it's fine. I can see why this would seem alarming to you.

John Rennie

@Sid I find it messy to eat rice with my hand. If it's sticky rice it's not so bad, but basmati rice is really hard to pick up. I always use a fork.

user228700

@Sid Even when I do eat rice with a spoon, I mix it with daal using my hand first. Then I wash it.

John Rennie

@0celo7 would you eat a hot dog with cutlery?

user228700

7:19 AM

@JohnRennie At this point, I feel that he's trolling :-P

Abcd

Please help me with this one.

I know that we have to use $v^2 = u^2 + 2aS$

Sid

with sign, yes

Abcd

But I am confused

@Sid Yeah, that's the cause of the confusion

0celo7

@JohnRennie I usually eat hot dogs with no bun and with onions, relish, and ketchup. Cutlery is necessary.

Sid

*not necessary

You are just habituated to it

user228700

7:21 AM

^

John Rennie

@0celo7 Fair enough, I wouldn't use my hands if I was eating a hotdog without the bun.

Abcd

Well, here are my two equations: 1) $v_b^2 = - u^2 - 2gh$

Sid

@Abcd you can do it the harder way, though

Abcd

2) $v_a^2 = u^2 - 2gh$

Sid

Find time taken for the balls to strike the ground. And then use, v=u+at

user228700

7:22 AM

Over here, wedding rings are made of pure gold and are worn on the right hand because this allows us to eat the tiniest fraction of gold during our meals.

Abcd

But the magnitudes don't look equal

@Sid Please tell me what's wrong with my equations

0celo7

@JohnRennie if there's a bun, I would use my hands. But in that case there's one coherent piece of food and no sauce

The people in that video are shoveling, literally, rice and sauce into their mouths.

user228700

@0celo7 Essentially, yes.

Sid

He he he

Abcd

Anyone?

Sid

7:24 AM

Hmm, looks correct to me..

John Rennie

@0celo7 it's a matter of degree. Most Westerners have no problem eating bread with their hands. Many will eat pizza with their hands (I do) but most of us wouldn't eat a curry with our hands. Other cultures just draw the line in a different place.

Sid

Remember that both v_a and v_b will be negative

0celo7

@JohnRennie I believe that line (eating habits) to be the primary marker of savagery

And with that, I'm off

Abcd

1) For the ball thrown downwards $-v_a^2 = -u^2 + 2gh$ + 2gh because both g and h are negative. 2) For the ball thrown upwards $-v_b^2 = u^2 + 2gh $

What's wrong with these?

user228700

@0celo7 I don't believe that knowing how to eat using cutlery makes one any more or less civilised; that argument doesn't make any sense at all. We all may have switched to eating using cutlery at any point in time but we haven't because eating with our hand makes for a more mindful experience.

Sid

7:32 AM

@Abcd you aren't getting the answers?

Abcd

@Sid ?

@Sid No

The answer is va = vb

Sid

@Kaumudi.H Typical Western "civility".

John Rennie

I must admit that I don't like the feeling of grease on my hands. That's the main reason I use cutlery most of the time.

user228700

@JohnRennie And this we have gotten used to!

Sid

I am unable to understand how someone eats chapati with cutlery? @JohnRennie

fork and knife?

user228700

7:34 AM

^ I was just about to ask!

John Rennie

@Sid I wouldn't use cutlery for eating chapati or naan

Sid

@Abcd I can't see any problem there.

John Rennie

But they are quite dry and leave little or no grease on your fingers.

Sid

Try using the time method. @Abcd

user228700

I struggled for many years to tear a roti with two hands, let alone one; it wasn't until I was 11 (and broke my left arm) that I learned the art of tearing a roti using one hand.

John Rennie

7:35 AM

And as I've mentioned about I eat fruit with my fingers, and sandwiches.

Abcd

@Sid But why is this not working?

Sid

I have no idea why

@JohnRennie If you don't eat sandwiches with hand, then there is something definitely wrong with you

John Rennie

@Sid yes, eating sandwiches with a knife and fork would be a bit weird :-)

Though I'm sure there are people who do.

user228700

All this talk about eating with hands made me completely forget that I was about to try making pomegranate milkshake! Brb!

Sid

@JohnRennie help abcd with their question

John Rennie

7:38 AM

@Abcd: what is the problem with the question?

Abcd

@JohnRennie I am unable to solve using the equation: v^2 = u^2 + 2aS

John Rennie

You don't need to use any equations to solve it.

The question say you throw ball A up with velocity $v$. Yes?

Abcd

Yes

John Rennie

So what is the velocity of the ball when it passes your hand on the way back down?

Sid

oh, duh

Abcd

7:41 AM

@JohnRennie Idk

Sid

that's what happens when you get out of touch with Physics

@Abcd Same v.

But downwards

Abcd

@Sid Whyy??

Sid

try using equation of motion to see

John Rennie

@Abcd When you throw the ball up it starts with some kinetic energy $\tfrac{1}{2}mv^2$

Abcd

@JohnRennie Let's avoid use of KE here, please

Sid

7:42 AM

Conservation of Energy

John Rennie

Yes I was going to use conservation of energy, but we can do it with a SUVAT equation if you want.

Abcd

@JohnRennie Yes, let's do with that

Sid

Use conservation of Energy. It's much easier

and time-saving

John Rennie

OK lets us $v^2 = u^2 + 2as$

Sid

@Abcd I think it should be clear now..

John Rennie

7:44 AM

We'll call the initial velocity $V$ so we don't get our $V$s mixed up. So the initial velocity $u$ is $+V$.

Sid

why velocity will be same, that is.

John Rennie

Then at the top of the trajectory the velocity is zero so the final velocity $v$ is zero.

Sid

@JohnRennie can't we simply use s=0?

and hence, mag. of v=mag. of u

Abcd

@JohnRennie Initial velocities are same for both (in magnitude)

John Rennie

@Sid Ah yes, good point.

@Abcd: Sid makes a good point. Start with the equation $v^2 = u^2 + 2as$.

Abcd

7:48 AM

@JohnRennie Then?

Oh Yes!

v = u then

John Rennie

If you throw the ball up then let it fall back to your hand then the net distance moved is zero i.e. $s=0$.

Well $v^2 = u^2$ so $v = \pm u$

Sid

um.. that should be displacement...

John Rennie

displacement = net distance moved

Abcd

@JohnRennie Yes

@JohnRennie yes

John Rennie

@Abcd: so do you now see why both balls have the same velocity when they hit the ground?

Abcd

7:50 AM

@JohnRennie Almost clear - which sign do we take +u or -u for initial velocity of ball B that is coming down after traversing the upward path?

John Rennie

Let $v$ be the magnitude of the initial velocity, then ball A starts with velocity $+v$ and ball B starts with velocity $-v$

Abcd

Yes

Then?

John Rennie

But after ball A has risen up then falled back to the start point its velocity has changed to $-v$.

That is, on the way back down ball A passes you at the same speed that you threw it up but in the opposite direction.

user228700

I am back! ...and I am able to guarantee that pomegranate milkshake (the way I made it) absolutely sucks.

John Rennie

@Kaumudi.H See, you should have just eaten the pomegranates :-)

user228700

7:56 AM

No, I shouldn't have added any milk :-( It tasted like sweetened milk and I hate the taste of raw milk. Smell, taste...

John Rennie

It tasted like sweetened milk - probably because it was :-)

I don't think pomegranate juice has much flavour of its own.

There's a drink in the UK called grenadine made from pomegranate juice, but it just tastes sweet to me.

@Abcd: you've gone quiet ...

user228700

Say, what does red wine taste like?

John Rennie

To me it just tastes sour, but I'm not a wine connoisseur.

user228700

Ohh, OK...

John Rennie

@Kaumudi.H: if you want a challenge learn how to make Melting Moments.

Sid

8:01 AM

which alcohol tastes the best?

John Rennie

These are the number one best cake/biscuit in the world.

@Sid I only drink beer.

user228700

@JohnRennie Does it have coconut/jam in it?

John Rennie

No

You could sprinkle them with coconut I guess ...

user228700

It does!

John Rennie

Instead of oats

user228700

8:02 AM

Ah, I wouldn't like that, then...

John Rennie

Ah the recipe says: desiccated coconut or oats

user228700

What is that in the middle if not jam?

John Rennie

I've only ever seen them made with oats. But then it's probably hard to find oats in india.

The thing in the middle is a glace cherry

user228700

@JohnRennie No, they sell oats in shops here.

Abcd

@JohnRennie There's no need to take roots. It's can be done directly with squares. Thanks. I did it.

John Rennie

8:04 AM

@Kaumudi.H Make them with oats then. That's how my mother makes them.

user228700

@JohnRennie But it doesn't look like a biscuit I'd like!

John Rennie

@Abcd Cool :-)

user228700

I don't like biscuits...

John Rennie

WHAT!!!

user228700

:-P Sorry...

John Rennie

8:05 AM

:: John faints away in shock and horror ::

user228700

I'd eat one if I were that desperate but not otherwise...

John Rennie

In my case desparate normally means I haven't eaten for five minutes :-)

user228700

@JohnRennie They sell those on the road here! In glass jars, on carts...

John Rennie

I love glace cherries in cakes.

user228700

@JohnRennie I don't :-P

user228700

8:07 AM

@JohnRennie Haha :-)

John Rennie

2 mins ago, by John Rennie

:: John faints away in shock and horror ::

Again

user228700

:-P It's too sweet and sticky for my taste!

John Rennie

I guess it depends on what you grew up eating.

When I was a boy glace cherries were a special treat that I absolutely loved.

user228700

Yeah. My sisters are wild for cookies and biscuits of all kinds but I don't fancy them at all...

user228700

Cookies aren't half bad though. The one with the chocolate chips and all :-)

John Rennie

8:10 AM

Cookies being slightly chewy?

user228700

Yep yep! And more chocolatey!

John Rennie

I like both cookies and biscuits. In fact I had white chocolate cookies after lunch yesterday.

I need to head off for half an hour or so ...

Avantgarde

@Sid best is subjective. :P

user228700

@JohnRennie Toodles!

Balarka Sen

Why is this chat slowly turning into the cooking.SE chat again

otoh it wasn't any better before

Avantgarde

8:22 AM

I didn't get the craze about beer though. Or maybe I haven't had a great one yet

user685272

9:09 AM

@BalarkaSen what's cooking?

Slereah

Hey hey

You know the nice thing about the particle data group book?

It's all 100% in dimensionful notation

The constants are all written explicitely

Thank u, editor in chief Zhi-Peng Zheng

Secret

9:43 AM

[Playing some powder toy today and reading saves by some users]

Slereah

you can tell it's an experimentalist book

"Einstein's General Relativity, the current "standard" theory of gravitation, describes gravity as a universal deformation of the Minkowski metric"

No it doesn't

Secret

NB: If constants are not important, I tend to just lump them up into one big constant sticking to the left of an expression if possible

Dawood ibn Kareem

@Abcd Brother, think of it in terms of kinetic energy and gravitational potential energy, assuming you're supposed to ignore friction and air resistance of course. If both balls have the same mass, then they both leave the roof with the same kinetic energy and the same gravitational potential energy. Therefore, they must hit the ground with the same kinetic energy, and hence the same speed.

Oh, I just read further and saw that John said that already. Sorry @Abcd.

Of course, if you take air resistance into account, the ball that's thrown upwards has more opportunity to lose kinetic energy to the air; so technically it will hit the ground at a slightly slower speed than the ball thrown downwards.

@BalarkaSen Occasionally, the people in the cooking chat room do discuss physics. I used to be a regular there. So I guess things kind of even out, across all the chat rooms.

Secret

All SE chatrooms are under constant superposition

Dawood ibn Kareem

Yup, we always superpose our constants here.

John Rennie

10:47 AM

@Avantgarde: that's what my second paragraph says!

Avantgarde

@JohnRennie :D Particularly the last sentence, I wanted to highlight the relationship that: massless implies relativistic

It's a decent question. Why the 2 downvotes? OP should just've explained the statement or quoted where he read it off

SBM

hello

Avantgarde

Hey SBM, long time

SBM

yes long time ignoring internet

mostly

Avantgarde

How do you feel after that experience?

SBM

11:00 AM

not much of a difference

Avantgarde

haha

then you're not using it as much in the first place anyway

SBM

right; most of my internet use is for looking at SE

not answering or asking though

today was my mother's birthday

Avantgarde

was? is?

SBM

Right

I'm syntactically inept

Avantgarde

:P

Go have fun

SBM

11:06 AM

What does :P mean?

Avantgarde

Or did you already

urbandictionary.com/define.php?term=%3AP

I thought you'd know what :P meant

SBM

Nobody celebrates their birthday not even me. Just wish each other and birthdays are just the same

Avantgarde

yeah

SBM

What would you suggest to learn electrodynamics and QM?

Avantgarde

You mean books?

SBM

11:16 AM

yes

Avantgarde

Griffiths for Electrodynamics. And Griffiths again, for basic QM, the initial chapters. Sakurai for remaining QM.

Griffiths' books are fun to read and are well-written. Sakurai is much more serious but it's very good

For Sakurai, I'm talking about 'Modern QM', not 'Advanced QM'

Secret

madsci.org/posts/archives/2001-03/985026483.Ch.r.html

cut glass underwater?

user029857

11:35 AM

lichess.org/@/AlexanderuAkbar

wanna play some chess?

John Rennie

@ACuriousMind: I can't help feeling you're being a bit fussy. To 99.9% of us the Schrödinger equation means the equation we learned when starting out.

Slereah

"The second step in the erection of the causal program is the extension to local neighbourhoods."

How does one erect the causal program

ACuriousMind

@JohnRennie The very Wiki article you link to first introduces $\mathrm{i}\partial_t \psi = H\psi$ as "the Schrödinger equation", and then gives the single non-relativistic particle as an example, which is the correct terminology. I think getting the terminology correct is important especially in question like this where someone is confused about a basic aspect of quantum mechanics.

Sir Cumference

@JohnRennie cringes imo glace cherries taste 1000% too sweet

John Rennie

4 hours ago, by John Rennie

:: John faints away in shock and horror ::

To be fair I wouldn't sit down and eat a pack of glacé cherries. I like them in cakes or other foods where they are diluted by cake/pastry/whatever.

Sir Cumference

11:41 AM

Yeah, but things like this:

Just make me uncomfortable

John Rennie

Candied fruits?

Sir Cumference

Yeah

John Rennie

Eating just one candied fruit is fine. Especially if it follows a savoury or salty course. The sweetness nicely offsets the previous course.

But again you wouldn't sit down and eat a lot of candied fruit. You'd die of a sugar overdose :-)

Secret

@Acuriousmind In topics of extra spatial dimensions, the spatial dimensions are often postulated to be compactfied as otherwise we would have already spotted particles at low energies that implied their existence a long time ago. But what if no currently known fundemental interactions except gravity can propagate through these dimensions, then there is a possibility that even if the dimensions are macroscopic, we would not have been able to pick up so far given we only just being able to do

gravitational astronomy in recent years?

Sir Cumference

Yeah, but I've seen people grab plates of just candied fruit

John Rennie

11:44 AM

So? I've seen people pierce their whatnots then put a ring through it. Some people do strange things.

Sir Cumference

True

John Rennie

@Secret that sounds like the brane world idea.

Secret

Ah I see, I must have somehow overlooked that by accident. I always thought the bulk is not spatial in nature

The Dark Side

12:06 PM

81

Q: A friend/coworker and his wife are employed at the same company. He found out she's cheating. What to do?

Full context: I've been at my job for about a year and have formed close bonds with a number of people, including my coworker "Josh". A new position opened up recently that Josh's spouse, "Jessica", was a perfect fit for, and she ended up getting the job. The day after Jessica got hired, Josh fou...

work-environment relationships company-policy new-hires

I feel tempted to post an answer:

Don't worry. That's your friend's problem. Let him come and post at Stack Exchange. Please relax and go to sleep.

Jack Clerk

Hello everyone!

I would like some help with my post:

0

Q: Some beginner doubt about Tensors

goodmorning: I have a silly doubt on Tensors. Ok, you would say that this question would fits more properly on Mathstackexchange but, here it's more cozy. Anyway: A vector, as we all learned in first year, could be written in this form: \begin{equation} \textbf{V} = \sum A_{i} \textbf{e}_{i} \...

general-relativity differential-geometry tensor-calculus

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