The h Bar

« first day (2191 days earlier) ← previous day next day → last day (2730 days later) »

0celo7

10:31 PM

@ACuriousMind Did you do the Railroad quest line back in the day?

ACuriousMind

@0celo7 Maybe?

Fallout 4 has not left a particularly strong imprint in my memory :P

0celo7

Hmm.

@ACuriousMind Did you know that an isometry of a compact metric space is automatically a homeomorphism?

rob

11:20 PM

Is this question clarified enough to re-open? I like it but don't want to overreach.

Q: Why T (time period) of ball bearing does not match with predicted value of T calculated using below formula?

In the last few minutes of Walter Lewin's lecture no.13, Lewin measures the oscillation period of a cart on a bent low-friction track and gets impressive agreement with his prediction. He then repeats the experiment for a ball bearing rolling on a bent track, and the prediction fails: $$\begi...

Sanya

@rob I'd really like the question to be a bit more accessible (i.e. more self-contained), with a bit of attempts at identifying the relevant different properties - but let the review queue decide I'd say

ACuriousMind

@0celo7 Every isometry is a homeomorphism, unless you have a strange definition of isometry.

rob

11:39 PM

@Sanya Well, I ask because I suspect my edit won't push it to the review queue --- an earlier, more minor edit already triggered a reopen review.

0celo7

@ACuriousMind Doesn't have to be surjective.

An isometry is just a distance preserving map

Sanya

@rob ah ok ... then honestly, maybe try getting the OP to just edit the question a bit more? Or put it on meta, that would also be useful in the context of our current policy discussions

ACuriousMind

@0celo7 My isometries are always bijective, but okay

Sir Cumference

Howdy

rob

@Sanya Hmmm. I guess I should learn what the edit-to-review logic is rather than having a vague idea.

ACuriousMind

11:53 PM

@Sanya cc @rob A question will not be re-queued by edits if it was already in the queue for edits once. Discuss it on meta and get a non-mod 3k user to cast a reopen vote to get it back into the queue

rob

I'm a little reluctant to start filling up meta by asking for guidance about stuff that I would have previously voted to reopen and moved on with.

dmckee

@rob It really needs to specify the shape of the bowl (presumably circular or parabolic cross-section), and it would be better if it at least nodded in the direction of the solution. But it is a solid conceptual puzzle, and in a form different from the one I give to my class.

rob

@ACuriousMind You're doing better at your new-mod homework than I am :-)

Sir Cumference

@obe How'd you get that huge pic of my avatar?

ACuriousMind

@rob It's not as if our meta is overflowing with posts. Maybe it's good to talk more about closures/reopenings on meta to ensure we're all on the same page what the close reasons actually mean (which we currently aren't at least in the case of homework)

dmckee

11:56 PM

I think bringing questions like that to chat is an acceptable step to take before going to meta. Especially if what you need is transient (just get a few qualified users to look at it).

ACuriousMind

@rob It's a little bit annoying that these detail infos are scattered all over meta instead of all being written in the FAQ. There's a certain element of luck to whether or not you know how a certain part of SE works

rob

A: Which edits push closed questions to the reopen review queue?

From a time when I probably knew something about this: Currently, this means that a closed question will automatically be added to the reopen queue when it is... ...Edited (body edits only) within 5 days of closure by the author. Or, ...Edited (body edits only) within 5 days of clos...