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David Z
David Z
12:04 AM
@Sofia that is exactly what you should be doing. Or just post the answer yourself.
Why do you "insist" on this? Do you have some reason to think we don't do that?
@0celo7 cc @Sofia you can also hover over the message you want to reply to and click the little arrow that appears at the right side. I think that's easier.
 
0celo7
0celo7
@DavidZ I'm upset I don't know that.
@bolbteppa I just did exercise (9.2.7). That helped a lot too. Now I understand.
 
David Z
David Z
@JimdalftheGrey that question was all of four minutes old when I closed it. Hardly what I'd call "fast". :-P
 
Danu
Danu
Heya David!
 
David Z
David Z
Hi @Danu
(going back to the prior topic) fastest closed questions, the lowest is 30 seconds
 
0celo7
0celo7
I see him on a lot of older posts.
What'd he advertise? (Overflow?)
 
Danu
Danu
12:13 AM
@DavidZ Pretty insane
 
ACuriousMind
ACuriousMind
@0celo7 PhysicsOverflow
 
Danu
Danu
@DavidZ Ah, but unilaterals don't count! I wanna see the fastest community response one
 
David Z
David Z
On SO their minimum is 9 seconds... 30 seconds barely cracks the top 100
 
Danu
Danu
@DavidZ is it... a competition? :D
 
David Z
David Z
@Danu see this: 50 minutes
@Danu not really, at least not as far as I'm concerned, but it's interesting to think about how the size of the site affects the distribution
 
ACuriousMind
ACuriousMind
12:15 AM
These queries do not gather the deleted questions though, right?
 
David Z
David Z
I believe that's correct
So maybe there are some quicker ones
 
Danu
Danu
I think we should get it under 10 minutes, that'd be awesome
 
user54412
1
Q: A particle is moving on a circular track with omega = 0.2926829268 rads/s. How many revolutions in 30s?

GiraffelopePhysics HW Q: A particle is moving on a circular track with omega = 0.2926829268 rads/s. How many revolutions in 30s? What I have done: It seems to me that I must convert from rads/sec to revs/sec: (0.2926829268 rads/s )*(1rev/2pi rads) = 0.4597452663 rev/s I tried multiplying it by 30s a...

homework-and-exercises rotation
 
ACuriousMind
ACuriousMind
I would believe there were faster community closures, but these would be also questions so bad they'd be downvoted heavily, and thus they'd not appear there
 
Danu
Danu
We just need to do it during a chat session
 
user54412
12:16 AM
^^ Fastest closed with partial community help
 
user54412
(97 sec, 7th place)
 
David Z
David Z
@Danu that would be great. But perhaps not practical, given how many people are active on this site.
If we had a site blog that might be an interesting analysis to do for a post.
 
Danu
Danu
@DavidZ During chat sessions this must be feasible
 
user54412
Hmm, related: fastest answers
 
Danu
Danu
I'd venture even 5 is possible
 
user54412
12:19 AM
74 seconds for the fastest non-self-answer, and it wasn't an answer-now-edit-later thing either
 
David Z
David Z
Interesting
 
user54412
Speaking of analysis...
 
user54412
14
Q: What is the correlation between answer quality and score?

Chris WhiteThere has been a general sense among a number of users, myself included, that simplistic, almost throwaway answers can get very high scores, while thoroughly researched, high-level answers can languish with few to no votes. See the discussion here for example. To what extent is this backed by da...

discussion content-level votes data-explorer
 
user54412
You should all be ranking answers in your copious free time
 
Danu
Danu
literally 0 motivation for that lol
 
user54412
12:22 AM
Yours, mine, random ones from across the site (though that last one will require a different data query to make sense of)
 
user54412
I found it kind of fun going back through my answers, like looking at an old photo album
2
 
user54412
some I recalled fondly; others I didn't remember writing at all
 
Danu
Danu
@ChrisWhite A good description of everything in life
...assuming one conveniently leaves out the option of bitterness ^^
 
infinitesimal
infinitesimal
true that^
 
NeuroFuzzy
NeuroFuzzy
I saw someone delete their own question after getting four downvotes maybe ten or twenty seconds after it was posted
that was impressive
 
user54412
12:28 AM
I think bitterness is why the site designers made it almost impossible to find your own deleted material
 
Danu
Danu
@ChrisWhite Good point!
anyhow, bed-time for me. Gonna try to follow @ACuriousMind's example and normalize the ol' sleep schedule
cya all
 
infinitesimal
infinitesimal
later pal
 
ACuriousMind
ACuriousMind
@Danu lol, hasn't worked, I'm not tired :P
 
Stan Shunpike
Stan Shunpike
@bolbteppa thanks that was exactly what my intuition was looking for but couldn't find the words to say
 
ACuriousMind
ACuriousMind
@ChrisWhite Did you go through your answers chronologically, or by numbers of votes, or somewhat random?
 
user54412
12:39 AM
@ACuriousMind chronologically, starting with the oldest
 
user54412
actually, reverse page order in my answers tab, but forward order down the page, so it was more like 30, 29, ..., 1, 60, 59, ...
 
user54412
before I realized this I was quite confused how I was forward-referencing myself without editing the answer
 
ACuriousMind
ACuriousMind
So, chronologically, but following a weird clock?
 
Sofia
Sofia
@DavidZ first of all please do not feel offended. I see the growing number of apparently not answered questions. But many of them are answered. Of course when I meet such a case I notify the commenter and advise him/her to post an answer. I currently do it. Well, people say, it was not so important comment, but sometimes it is important.
 
user54412
@ACuriousMind I work with GR, so a weird clock is a given.
 
ACuriousMind
ACuriousMind
12:43 AM
Touché :)
 
Sofia
Sofia
@DavidZ de facto, I never saw such an advice from the moderators.
 
DanielSank
DanielSank
@ACuriousMind I must not understand how to access the queue, or I don't have the rep for it, because I don't see anything indicating a full queue. I do occasionally see items in an edit queue.
@Sofia I don't know how to do that. If you find out please let me know. Perhaps you can invite the user to a chat room...
 
David Z
David Z
@Sofia hm. Well, in that case I'm telling you know: things that answer the question should be posted as answers, not comments, and it's very much encouraged for anyone to point that out when needed.
 
ACuriousMind
ACuriousMind
@DanielSank Well, everything's alright now, but do you know that there is a review button in the top right corner on the main site, next to the (useless) search field?
 
David Z
David Z
@DanielSank you're talking about something akin to private messaging, right? There is no way to do that, and that is intentionally part of the system's design.
 
Sofia
Sofia
12:45 AM
@DavidZ and it becomes tiresome for other users who try to solve problems. As I said, I have to read a whole dialogue to find whether the question was really answered.
 
ACuriousMind
ACuriousMind
And you are above 3k rep, so you can access all queues
 
David Z
David Z
@Sofia exactly, which is why answers should be posted as answers, not comments.
 
Sofia
Sofia
@DavidZ an answer, would get negative marks if it is bad. A comment, I have to read it and ponder over it. It's time consuming. Some measure has to be taken against answering by comments.
 
David Z
David Z
@Sofia yep. There are three way we discourage people from posting answers as comments:
(1) someone else posts a comment to suggest converting the comment into an answer
 
Sofia
Sofia
@DavidZ you are telling me, O.K., but what measures are available against answering by comments?
 
David Z
David Z
12:48 AM
(2) someone else can just take the content of the comment and post it as an answer (while following the plagiarism rules, of course)
 
Sofia
Sofia
@DavidZ what else?
 
David Z
David Z
(3) flag the comment so that it will get deleted. Usually the best flag is "obsolete" but you can also pick one of the others if it applies.
 
Sofia
Sofia
@DavidZ Aye! An answering comment deleted? It's harm!
 
ACuriousMind
ACuriousMind
@DavidZ Uh, that's not really helping anyone, is it? (Unless someone took the content of the comment and put it into an answer)
 
David Z
David Z
@ACuriousMind it helps all the people who now know that the question has been answered without having to hunt through the comment section
In particular, the person who asked the question in the first place
 
Sofia
Sofia
12:50 AM
@DavidZ and how to avoid plagiarism when sometimes the comment is very good? It's against conscience to copy a good comment of someone.
 
David Z
David Z
@Sofia Put it in a quote block, and make sure to properly attribute it. You might say, for example, "As [user] said in the comments,..."
Or you can rephrase the comment. That way you don't have to put it in a quote block.
There's nothing wrong with copying a comment, as long as you attribute it and quote it properly.
 
Sofia
Sofia
@DavidZ how to sign in the place of the real author? I don't want for myself the points that I think he deserves. It's stealing smbd.'s work. I don't need that.
 
David Z
David Z
@Sofia no, it's not stealing. When someone posts something as a comment which should have been an answer, they are placing that information out in the world for anyone to use.
If they wanted the reputation, they should have posted it as an answer.
 
Alfred Centauri
Alfred Centauri
@Sofia good grief Sofia, refer to the comment like "as foobar correctly wrote in a comment..." and then expand on it. The expansion is yours and you've earned the points (up or down) you get for your value added. Is this really that hard?
 
Sofia
Sofia
@DavidZ what you mean by properly attribute that?
 
David Z
David Z
12:54 AM
@Sofia you have to say who originally posted the text you are copying.
 
infinitesimal
infinitesimal
give a reference
 
Sofia
Sofia
@DavidZ , @AlfredCentauri no plagiating, no matter in which indirect form!!!!
 
David Z
David Z
....huh?
 
Sofia
Sofia
@DavidZ a honest solution is needed!
 
ACuriousMind
ACuriousMind
It's only plagiarism if you don't say from whom you got it
 
infinitesimal
infinitesimal
12:57 AM
have you guys seen this?
 
Sofia
Sofia
@DavidZ , @ACuriousMind how do I re-direct the points to the correct person? How do I get rid of smth. that isn't mine?
 
ACuriousMind
ACuriousMind
@Sofia They are meaningless internet points. If the person writing the comment had wanted them, they'd have written an answer
 
David Z
David Z
@Sofia you can transfer reputation in certain amounts by awarding a bounty. But really, if you posted the answer, the points are rightfully yours. (Assuming there is no vote fraud involved.)
 
user54412
@Sofia You cannot redirect points. If you really don't want them, you can mark the post "community wiki" when you write the answer (there is a checkbox below the place where you type the answer). Then you get no reputation for the answer (and neither does anyone else).
 
Sofia
Sofia
@DavidZ I won't tarnish my hands.
 
infinitesimal
infinitesimal
12:59 AM
tarnish?
 
Sofia
Sofia
@infinitesimal of course!
 
ACuriousMind
ACuriousMind
@infinitesimal So, an app that saves you the effort to type the equation into wolfram alpha? :P
 
Sofia
Sofia
@DavidZ how can we punish people who answer by comments?
 
David Z
David Z
@Sofia well, that's up to you. Nobody forces you to write an answer.
 
Alfred Centauri
Alfred Centauri
@Sofia Remarkable. You're worried about getting points that someone else didn't earn but are not concerned at all that you just implied DavidZ is dishonest.
 
David Z
David Z
1:01 AM
@Sofia flag the comments for deletion.
 
NeuroFuzzy
NeuroFuzzy
@infinitesimal meh!not too interesting IMO!
 
Sofia
Sofia
@AlfredCentauri you'd better stay away. It's issues of the moderators here.
 
Alfred Centauri
Alfred Centauri
@Sofia not a chance. You're far too entertaining.
 
Sofia
Sofia
@DavidZ @DavidZ hmmm! It may be a solution. Flag the comment, and send a corresponding comment to the author to make it an answer.
@DavidZ what you say?
 
David Z
David Z
That works just fine.
 
DanielSank
DanielSank
1:04 AM
@DavidZ Uh, no. I was talking about inviting a user to a chat room.
Isn't that a thing?
@ACuriousMind Nope. I did not notice that.
 
ACuriousMind
ACuriousMind
@ChrisWhite: Does your formulation for the levels 4,5 mean that I have to have actually researched something to award that level of quality?
 
David Z
David Z
@DanielSank oh okay... I think you have to ping them in a comment or another chat room and give them a link to the new chat room. I don't believe there's a builtin system for inviting users to chat rooms. But I'm not sure.
 
Sofia
Sofia
@infinitesimal was it a joke? I am not volunteering myself to be topic of jokes!!!! Kindly take your joke for people who seem to accept.
 
ACuriousMind
ACuriousMind
@DanielSank Well. Now you know where the main janitorial work of SE is done - welcoming new users, weeding out spam answers, closing and reopening questions, etc.
 
DanielSank
DanielSank
This explains so many bizarre conversations. Thanks @ACuriousMind.
 
ACuriousMind
ACuriousMind
1:06 AM
Heh, I can see you sitting there with a big question mark over your head while people are talking about reviews and queues and stuff :D
 
infinitesimal
infinitesimal
@Sofia sorry
:(
 
Sofia
Sofia
@infinitesimal @infinitesimal that's better!
 
ACuriousMind
ACuriousMind
@Sofia: For someone who is not that careful herself about offending others, you are far too quick to take offense yourself.
 
infinitesimal
infinitesimal
@Sofia it will NOT happen again @Sofia
 
user54412
@ACuriousMind Nah. Certainly not for 4, which tended to be really good exposition. Things I did research by reading actual journal articles tended to be 5's, but the converse didn't always hole.
 
Sofia
Sofia
1:09 AM
@ACuriousMind did I ever offend you? Even without waiting for an answer from you I already apologize. I never want to offend.
 
infinitesimal
infinitesimal
Actions ignore this user (everywhere)
 
Sofia
Sofia
@infinitesimal that's interesting! How can I do for ignoring someone that displeases me? And everywhere, as you say?
 
ACuriousMind
ACuriousMind
@Sofia Well, you are very quick with words like dishonesty or punishment. I am not that easily offended, but as Alfred for example indicated, you were effectively claiming that DavidZ was only proposing dishonest solutions. That's certainly a bit offensive.
 
infinitesimal
infinitesimal
@Sofia click on their avatar and you will find it as the bottom option.
 
Sofia
Sofia
@DavidZ , @ACuriousMind I am not aware, and in my 1st statement to DavidZ I asked him not to take offense. I am a constructive creature. Could it be that you don't know that?
 
user54412
1:13 AM
Question titles don't need to remind the reader that the question is a question :) Check out some useful hints on how to write good questions on this meta post. — DanielSank 6 mins ago
3
 
user54412
@DanielSank I like that comment
 
user54412
We should be more diligent in teaching new users how to make good posts
2
 
ACuriousMind
ACuriousMind
@Sofia Asking someone not to take offense does not grant one licence to say offensive things. That's simply not how it works.
 
Sofia
Sofia
@ACuriousMind what for God's sake I said? I have no idea of offending him in some way. Tell me what it was.
 
ACuriousMind
ACuriousMind
19 mins ago, by Sofia
@DavidZ a honest solution is needed!
This effectively implies that everything David said before was dishonest
And that's at the very least potentially offensive.
 
infinitesimal
infinitesimal
1:16 AM
he does have a point @Sofia
 
Sofia
Sofia
@ACuriousMind You! Of course, if you are in 5 activities at once, how can you be aware of the context? I.e. the issues that we discussed before that?
 
ACuriousMind
ACuriousMind
@Sofia I have watched the entire discussion, rest assured
 
Kyle Kanos
Kyle Kanos
I got a good chuckle out a few things said
 
infinitesimal
infinitesimal
me too
:-)
 
Sofia
Sofia
@ACuriousMind I have to tell you what Lenin said: who is not with us, is against us. You are not with me during the talk, so you come and accuse me. (Lenin meant smth. else).
 
ACuriousMind
ACuriousMind
1:19 AM
Well, I wouldn't have said anything if you hadn't attacked someone else so sharply for poking a bit of harmless fun at you.
 
Sofia
Sofia
@ACuriousMind you accuse an innocent creature.
 
infinitesimal
infinitesimal
13 mins ago, by Sofia
@infinitesimal was it a joke? I am not volunteering myself to be topic of jokes!!!! Kindly take your joke for people who seem to accept.
 
ACuriousMind
ACuriousMind
^that exactly
 
Sofia
Sofia
@ACuriousMind you are not focused. DavidZ told me nothing funny. We had a serious talk.
 
ACuriousMind
ACuriousMind
@Sofia I am focused. You seem to not understand how a chat works - there are many people here, and they are free to talk at any moment and speak their mind - be it serious, or be it funny
It is not your place to barge in here and tell people to shut up
 
Sofia
Sofia
1:22 AM
@ACuriousMind your statement is not debugged.
 
ACuriousMind
ACuriousMind
It needs no debugging :)
 
0celo7
0celo7
SO SAD
 
ACuriousMind
ACuriousMind
Thanks for this perfect demonstration of a chat :D
 
infinitesimal
infinitesimal
lol
 
0celo7
0celo7
Whut
 
Sofia
Sofia
1:23 AM
@ACuriousMind perfection is only for God! But if you want to accuse me ..... without accepting that you make mistakes .....
 
ACuriousMind
ACuriousMind
@0celo7 Lol, you didn't read any of the conversation before posting that, did ya?
 
0celo7
0celo7
@ACuriousMind I still have like 600 of these things to go through.
I did, something about serious talk and people posting random stuff. Didn't read too carefully.
 
ACuriousMind
ACuriousMind
@Sofia I have never said that I am flawless. I merely pointed out that your behaviour is easily perceived as rude.
 
infinitesimal
infinitesimal
@Sofia I made a mistake and said I was sorry, let us just let it go please?
 
ACuriousMind
ACuriousMind
@0celo7 You a court jester in a former life?
 
0celo7
0celo7
1:26 AM
@ACuriousMind I don't know if you're calling me funny or a fool.
 
ACuriousMind
ACuriousMind
@0celo7 Mostly funny :)
 
infinitesimal
infinitesimal
jesters are funny
 
0celo7
0celo7
I was going for the latter, because of our homotopy discussion earlier.
 
ACuriousMind
ACuriousMind
@0celo7 I'd never call you a fool for trying to learn stuff
 
0celo7
0celo7
It's still kinda shady, because the manifold is still the manifold...just smaller.
 
user54412
1:28 AM
^ very zen
 
Sofia
Sofia
@ACuriousMind @ACuriousMind you said more than this.
 
0celo7
0celo7
You said I don't learn concepts. Which used to be true, but now I ask a lot of questions so I don't not know concepts...if that makes sense.
 
ACuriousMind
ACuriousMind
@0celo7 Well, perhaps you put it in the washing machine and it shrunk? ;)
 
0celo7
0celo7
Heh
So who got offended? What joke was made?
 
ACuriousMind
ACuriousMind
@0celo7 I was just confused because one moment, you were throwing complicated formulas at me, and the next you ask me if a diffeomorphism is a bijection. For me, that doesn't quite fit together, but I guess it is perfectly normal when you are actually learning the stuff from a book
 
infinitesimal
infinitesimal
1:32 AM
yep, book-learning is different that way :)
 
user54412
@ACuriousMind Self-studiers never fail to amaze me with the order in which they learn concepts. One moment they're on the verge of quantizing gravity, the next they ask why the Earth doesn't fall into the Sun or something.
 
Jiminion
Jiminion
@ChrisWhite I didn't realize until I asked a question that black holes seem to be at the crux of the quantum gravity thing.
 
0celo7
0celo7
I knew Einstein's field equations before I knew what a coefficient of friction was.
"Knew" as in could write them down and broadly explain parts.
I've since then refined my understanding.
 
ACuriousMind
ACuriousMind
@0celo7 Heh, you see, that seems just unusual for non-self-studiers like me who were chained by a curriculum
I'm not sure if I could explain the EFE well even today, though
 
0celo7
0celo7
@ACuriousMind In that case, I saw no reason to learn "simple" mechanics like that. You hardly need free body diagrams for theoretical physics.
I figured I'd get it as a part of my natural curriculum.
 
ACuriousMind
ACuriousMind
1:39 AM
Like "Here's the matter part, and there's the geometry, and, uh, that's basically it"
 
0celo7
0celo7
Hence why I'm rather bad at differential equations. I'm gonna get that next year in college, so for now Wolfram works fine.
 
ACuriousMind
ACuriousMind
@0celo7 It's "amazing" how useless all the "basic physics" essentially becomes. All they do is give you practive solving equations and, if you're lucky, intuition.
 
0celo7
0celo7
@ACuriousMind I think the hardest part for self-studiers is getting intuition.
And not being bored in class. I answered "false" for the T/F question "Is gravity a vector quantity." The resulting argument was well worth it.
 
ACuriousMind
ACuriousMind
Probably.
@0celo7 Hahahaha...who did win?
Or rather, who did your teacher decide won? :P
 
0celo7
0celo7
@ACuriousMind My physics teacher is a Princeton EE. She probably won in her head.
 
user54412
1:43 AM
The most fun I've had teaching: Grilling the theoretical students in lab with questions based on physical intuition.
 
0celo7
0celo7
I got the points on the test corrections though.
She came at me with some BS "this is Newtonian physics".
I should have used the "Newtonian physics does not permit life" line.
 
ACuriousMind
ACuriousMind
@ChrisWhite God, you're one of these people. But, no, it's really good to show us theoreticians that math is not everything :)
 
0celo7
0celo7
@ChrisWhite Aren't you a theoretician though?
 
user54412
Yeah, but there never was a good theoretical physicist who wasn't somewhat acquainted with experiment.
 
infinitesimal
infinitesimal
you gotta keep your feet on the ground
 
ACuriousMind
ACuriousMind
1:46 AM
@infinitesimal Unless you're touching a voltage line
 
user54412
I think I picked up this philosophy from chatting with my undergrad adviser, who knew a thing or two about theory.
 
ACuriousMind
ACuriousMind
@ChrisWhite "Politzer is well known for wearing Hawaiian shirts on a regular basis." Thanks, Wiki!
 
infinitesimal
infinitesimal
@ACuriousMind you and your exceptions ;-)
 
user54412
LOL
 
user54412
I should edit that to say "and sweatpants"
 
user54412
1:48 AM
he was quite laid back
 
Stan Shunpike
Stan Shunpike
@ChrisWhite Politzer was cool. He used to do demonstrations all the time in Ph1c.
 
0celo7
0celo7
How did I end up on this video?
 
Kyle Kanos
Kyle Kanos
@0celo7 By clicking buttons?
 
0celo7
0celo7
@KyleKanos Nope, that's the weird part.
 
ACuriousMind
ACuriousMind
::channelling Jim:: Magnets!
 
infinitesimal
infinitesimal
1:51 AM
@ACuriousMind Einstein was a giant. His head was in the clouds, but his feet were on the ground.
 
user54412
@StanShunpike You had him for class? Lucky :) I was always jealous that the physics-for-physicists courses had fewer demos, at least when I was there.
 
0celo7
0celo7
Fun fact: Placing my phone to the left of my trackpad turns off the screen.
Magnets!
 
Kyle Kanos
Kyle Kanos
@0celo7 Highly debatable. You can't get very far on the internet without clicking something
 
0celo7
0celo7
@KyleKanos iPad?
 
Kyle Kanos
Kyle Kanos
I'd call touching also clicking
 
user54412
1:52 AM
@KyleKanos ::goes off to write script that randomly follows links without user input::
 
ACuriousMind
ACuriousMind
@infinitesimal Oh god, what did he do during thunderstorms?!
 
Kyle Kanos
Kyle Kanos
@ChrisWhite That does not sound fun
 
ACuriousMind
ACuriousMind
Wait, I know, that explains the hair
 
Kyle Kanos
Kyle Kanos
The internet is a deep, dark place
 
Stan Shunpike
Stan Shunpike
@ChrisWhite Yeah! It was neat. Caltech was amazing. I felt like they had made a mistake admitting me initially, but I realized how many smart people there were and it kind of motivates you to see what you can do.
 
infinitesimal
infinitesimal
1:54 AM
@ACuriousMind you know who said that, right?
 
Kyle Kanos
Kyle Kanos
sigh grading sucks
Q2: Why are the masses transferred from the hanger to the glider, instead of simply removing masses from the hanger? Since the mass beign broped is attached to the horizontol mass so it slows the speed down
Huh?
 
ACuriousMind
ACuriousMind
@infinitesimal Honestly, I don't know
But it's probably Feynman
Or Hawking
But more Feynman
 
infinitesimal
infinitesimal
Correct.
Feynman
 
0celo7
0celo7
@KyleKanos What is the correct answer?
 
Kyle Kanos
Kyle Kanos
Another answer to the same question: by transfering mass to the glider it decreases the acceleration of 9.83 meters per sec
 
ACuriousMind
ACuriousMind
1:56 AM
Note to self: Don't grade intro physics.
 
user54412
@StanShunpike I've come to believe the most important part of college -- any college -- is finding the right group of people to push you to go further than you would go alone. Everyone has access to the same information; it's really just a question of who you hang out with.
 
Kyle Kanos
Kyle Kanos
@0celo7 Something along the lines of In order to judge the relation between Force and acceleration in Newton's law, we need to keep the total mass constant.
 
Sofia
Sofia
Does someone know the answer to this question ?
 
0celo7
0celo7
@KyleKanos You too busy to provide some context with that? (I assume there's a diagram or something of the sort.)
 
infinitesimal
infinitesimal
@ACuriousMind here is the rest of the quote "But those of us who are not that tall have to choose!"
 
ACuriousMind
ACuriousMind
1:58 AM
@infinitesimal Ohhh, clever :P I choose the clouds, they're soooo fluffy
 
Kyle Kanos
Kyle Kanos
@0celo7 It's a lab, Force, Mass & Acceleration. Basically the students took a hanging weight attached to a glider-on-a-rail system and let it fall freely. The took data on the velocity vs time (getting the acceleration from the slope) and then moved some of the mass from hanging weight and put it on the glider
 
Stan Shunpike
Stan Shunpike
@ChrisWhite I feel that way too.
 
Kyle Kanos
Kyle Kanos
^Like that
 
infinitesimal
infinitesimal
Einstein was a giant. His head was in the clouds, but his feet were on the ground. But those of us who are not that tall have to choose!
recalled by Carver Mead in Collective Electrodynamics: Quantum Foundations of Electromagnetism (2002), p. xix
 
Kyle Kanos
Kyle Kanos
Since the hanging weight is what's moving it, $a=m_{hang}g/m_{net}$
 
0celo7
0celo7
2:01 AM
@KyleKanos That question is a bit vague, but your answer makes sense.
I've done this lab in AP Physics C.
 
Kyle Kanos
Kyle Kanos
I bet it's less vague if you're actually doing the lab
 
0celo7
0celo7
Or at least something very similar.
@KyleKanos Yeah.
 
dmckee
dmckee
2:24 AM
@Sofia Well, since you insist I won't say "No": I'll say "Heck no!".
Let me repeat something that I know I've written to you before: everyone here is a volunteer.
You don't get to force them to do things.
You don't get to tell them to do things your way.
If you think the community isn't doing something right you are welcome to bring it up on meta and see if you can convince people. That's how policy gets made and changed.
 
vzn
vzn
2:36 AM
@infinitesimal reminds me of the famous newton quote re standing on shoulders of giants. heard it? he also has a great quote re picking up shiny pebbles on the seashore. kind of religious/ spiritual almost...
@ACuriousMind this is a key issue attempting to discriminate competing theories. this addresses also some of innis' points. different interpretations are competing theories that havent developed popperian falsifiability criteria... "yet". some never will. some eventually will. this is the work of theorists mainly translating theories into predictions/ experiments. one standout example/ master of this was bell.
but lets keep in mind that an intrinsic part of (advanced) physics is devising such criteria/ experiments. (despite much of the theme/ spirit of this chat room dialog) physics is not merely what is written in textbooks & papers...
> Imagination is more important thank knowledge. —Einstein
oops typo than k
 
Sofia
Sofia
2:52 AM
@dmckee where from did you take that I force somebody? A suggestion is no forcing. If altering someone's words you can transform a well-intended person into purely a criminal. When you suggest something, you force people? Why have my well-intended words be altered? What happens? I got enough accusations, should I be sent to the guillotine for just proposing something for the benefit of the users?
 
vzn
vzn
lol everyone else is gone its just you & me alone now in a room sof :)
 
Sofia
Sofia
@dmckee I got offenses, insults, mockery. So, well-come to the club that judged me for imagined intentions that I didn't have.
 
infinitesimal
infinitesimal
@Sofia Why are you over-reacting?
 
vzn
vzn
sof, a tip-- a significant # of your upvotes prob come from ppl in this room. best not to offend. your passion for physics is great, but dont get carried away...
 
Jiminion
Jiminion
I'm chaperoning....
 
Kyle Kanos
Kyle Kanos
2:55 AM
@Sofia You did say, "I insist..." (my emphasis)
 
vzn
vzn
hah never alone for long in this room
so Jiminion in answer to your earlier question, would personally currently rate bohmian mechanics 6 on the 1-10 credibility scale. :)
 
Jiminion
Jiminion
@vzn OK, so fringy, but not completely so... (they got all whacked about what the scale meant.....geez.)
 
0celo7
0celo7
0
Q: is energy of a quantum mechanical moving particle conserved?

Ankush Mandalfrom Schrodinger equation $H¥=E¥ $ , if we want to measure the total energy of a quntum mechanical moving partical thrn we have to apply the Hamiltonian of energy operator to the wave funtion and as a result we get of of the eigenvalue of the Hamiltonian. Now let a partical is moving under a cent...

quantum-mechanics
Time for ectoplasm?
That's not the SE, I have no clue what the symbol is.
 
vzn
vzn
admit its a freakin miracle anyone is even willing to talk about bohm in here, very much enjoying the recent mileage, wish was around for all the dialogs :)
 
Sofia
Sofia
@vzn this site never helped me. I only offered help. About points, it's not a Nobel prize. The points only give me the privilege to help even more. And if I am shown the door, I have nothing to loose. I propose only for offering help.
 
vzn
vzn
2:58 AM
cmon sof relax a little. ofc its helped you.
it helps everyone. thats the point of se :)
 
Sofia
Sofia
@vzn what is ofc ?
 
infinitesimal
infinitesimal
If you got offended: I said I was sorry. If you got insulted: I said I was sorry. If you felt I was mocking you: I said I will never do it again. What more can I say @Sofia?
 
vzn
vzn
ofcourse
do you like margaritas? try a margarita & get back to chat. :)
 
Kyle Kanos
Kyle Kanos
@0celo7 Uh, psi?
Well, that's what it's supposed to be
It's actually a symbol for the Yuan, I think
 
vzn
vzn
??? what was that terrible joke inf, saw transcript & really scratching head here
 
Sofia
Sofia
3:00 AM
@infinitesimal ohh! I didn't speak of you. It's someone else. Please believe me.
 
Kyle Kanos
Kyle Kanos
Chinese yuan
The yuan (/juːˈɑːn/ or /ˈjuːən/; sign: ¥; Chinese: 元; pinyin: yuán; [ɥɛ̌n]) is the base unit of a number of former and present-day Chinese currencies, and usually refers to the primary unit of account of the renminbi, the currency of the People's Republic of China. It is also used as a synonym of that currency, especially in international contexts – the ISO 4217 standard code for renminbi is CNY, an abbreviation of “Chinese yuan”. (A similar case is the use of the terms sterling and pound to designate the British currency and unit.) A yuan (Chinese: 元; pinyin: yuán) is also known colloquially as...
 
0celo7
0celo7
Or yen...
 
Jiminion
Jiminion
Can you apply a Hamiltonian to a wave function?
 
0celo7
0celo7
@Jiminion of course.
 
vzn
vzn
sof have never seen someone get quite so wrapped up in se... er maybe except for myself awhile back :|
 
0celo7
0celo7
3:00 AM
You have to get the correct representation.
 
Sofia
Sofia
@infinitesimal it's smbd. else. This is why I asked you how to ignore, or. smth. like this.
 
Jiminion
Jiminion
I'd think the energy of a wave function would be affected by the uncertainty princ.
 
vzn
vzn
somebody hit sofias nerve/ stepped on toe.... ???
 
Sofia
Sofia
@infinitesimal I am quick at forgetting, unless smbd. insists systematically.
 
Kyle Kanos
Kyle Kanos
@0celo7 If you're going to make an edit, try doing everything: spelling, tags, title. You shouldn't change just the Latex
 
Jiminion
Jiminion
3:03 AM
"You shouldn't change just the latex" sounds naughty.......
 
vzn
vzn
so sof how about a seminar on your papers sometime? :)
 
Sofia
Sofia
@vzn I was indeed wondering how one say in English to tread on smbd's legs. So, I understand that you told me now.
 
Jiminion
Jiminion
step on their feet.
 
Sofia
Sofia
@Jiminion not tread on their feet? What is the difference between the two expressions?
 
Jiminion
Jiminion
depends. Stepping on their toes is sort of like getting their way, intruding.
 
Sofia
Sofia
3:06 AM
@Jiminion and treading?
 
vzn
vzn
"step on toes" = hurt feelings, provoke, accident, misstep etc
 
Sofia
Sofia
@vzn and treading?
 
vzn
vzn
tread lightly :)
 
Jiminion
Jiminion
"Don't tread on me" is a 1776 slogan. More serious.
 
vzn
vzn
sof dmc is a mod, you understand that right?
 
Sofia
Sofia
3:07 AM
@vzn, what about treading? I saw an expression "tread on corns"
 
Jiminion
Jiminion
tread on corns is apparently hurting someone's feelings by bringing up a sensitive subject, I guess because corns are sensitive.
 
Sofia
Sofia
@vzn what is dmc?
 
0celo7
0celo7
-2
A: Given the Wikipedia notion of "arc length", how is its manifestly real "signed variant" to be called and denoted?

user12262I don't remember having seen the specific expression of the proposed "signed arc length" either (anywhere but related to the OP question), nor anything resembling (1) the more abstract expression for determining the sought resemblance. For naming this proposed functional from the set of curves ...

Haha the answer to his own question got downvoted!
 
David Z
David Z
New on the internet (apparently):
Some people say that dress looks white and gold, others say it looks blue and black
We might get a question about it at some point
 
0celo7
0celo7
NSFW (probably, likely)
 
infinitesimal
infinitesimal
3:27 AM
:O
 
0celo7
0celo7
 
infinitesimal
infinitesimal
Not the "N" word, nothing brings the trolls out faster than that word.
 
Physics Meta
Physics Meta
0
Q: Why do users answer questions?

user21945I know very little about physics compared to most users of physics StackExchange. Even so, if I knew a grain more than what I know now, I wouldn't care to answer the questions of others. I'd rather focus on answering my questions. What motivates users of this site to answer questions? Do most of...

discussion answers
 
0celo7
0celo7
16 dress threads on /b/.
 
Kyle Kanos
Kyle Kanos
@DavidZ Who sees it as white/gold?
 
infinitesimal
infinitesimal
3:33 AM
Sounds like another meme is gonna catch fire :-)
 
Kyle Kanos
Kyle Kanos
Oh...so it's an optical illusion?
 
vzn
vzn
(reminds me of that earlier exchange re color blindness)
 
infinitesimal
infinitesimal
The trolls don't care what anyone sees, they just what people to argue.
They are by definition instigators.
For the sake of instigating.
 
vzn
vzn
yes. internet is instigators/ "trolls" "wet dream" :o
 
Kyle Kanos
Kyle Kanos
I see, so there's nothing to the dress?
 
infinitesimal
infinitesimal
3:41 AM
Indeed.
Nothing.
 
Kyle Kanos
Kyle Kanos
Good
@0celo7 To be honest, I think you used more characters writing (tensor product omitted) than it'd take to write \otimes
 
0celo7
0celo7
@KyleKanos True, but $\sqrt{g_{\mu\nu}dx^\mu\otimes dx^\nu}$ does not make much sense.
I was going for the $ds=\sqrt{-g_{\mu\nu}dx^\mu dx^\nu}$ thing you see in introductory texts.
 
NeuroFuzzy
NeuroFuzzy
@infinitesimal you're going to think I'm lying but I was just standing in the elevator and I scrolled over it on facebook. I read the title, thought "dumb, not worth my time, it's white and gold" and kept scrolling.
then I heard my roommates arguing over it
and then I come on here and it's on here too!
So maybe it's a legitimate optical illusion OR... well someone posted a color inverted picture so maybe it's a trick.
 
infinitesimal
infinitesimal
It has gone viral @NeuroFuzzy
 
NeuroFuzzy
NeuroFuzzy
No, I think it's an optical illusion that's hard to see!
erm that wasn't a "no" addressed to you hah! Yep.
 
infinitesimal
infinitesimal
3:57 AM
Is our life so boring that we have to talk about the color of a dress on the internet?
 
NeuroFuzzy
NeuroFuzzy
Is our life so boring we have to talk about talking about the color of a dress on the internet?
 
Kyle Kanos
Kyle Kanos
We could talk about ever watchful eyes
 
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