whatever, quid - 2020-07-27

sai-kartik

00:44

@amWhy i'll have the three of those chocolates in the middle row starting from the left, thanks.

Calvin Khor

05:00

On the topic of chocolates, how do people open Hershey Kisses? I ignore the paper strip and unwrap the foil

user21820

@CalvinKhor Same here. But after unwrapping, the paper strip allows you lift the chocolate up more easily. No idea if that's the intended purpose or not.

Calvin Khor

05:24

@user21820 huh, just tested and it works! so its not completely useless...

user21820

@CalvinKhor Haha. Enjoy. =P

Calvin Khor

enjoying :):)

user21820

07:29

@quid: If I notice that a particular user repeatedly posts the same rude comment on multiple threads, should I search for more such comments and flag them?

Knight

07:51

@user21820 @CalvinKhor I’m getting a downvote for putting time and effort in answering a question, lol

Why are you even answering a bad question? It lacks context and even does not specify what the OP doesn't understand! — Arjun 20 mins ago

If the question was not meeting some standards it would have been closed and I couldn’t add an answer, but it is still open (after 2 hours) so it clearly means we can add answers to it.

-1

A: Acceleration as derivative of velocity

I have found this video of $3$Blue$1$Brown where he talks about acceleration. He introduces the concept of higher derivatives and uses acceleration as his example. The physical definiton of acceleration is acceleration is the rate of change of the velocity of an object with respect to time. If ...

user21820

@Knight No that is not what it means. There are bad questions that remain open simply because not enough people saw it. You shouldn't answer a question just because it is open. However, I see no reason for your answer to be downvoted because it attempts to teach the asker rather than provide free solutions to lazy people.

That said, I also haven't upvoted because acceleration is certainly not as you defined it. I don't agree with simplifying mathematics until it becomes wrong.

Knight

@user21820 Okay! I would really like to learn my mistake. Can you please please tell me?

Calvin Khor

@Knight disregarding y/our history with this user, what he said is definitely something I have seen echoed by other people, but in fact I believe that there is some context in the question, since we were given some text indicating the background of the OP. Whether or not its a 'bad question', I don't know if you can see that there are already 4 close votes on it. So it is likely to be closed soon

Knight

@CalvinKhor Yes, but why that good, rule-abiding user has not downvoted and added his very precious commmet on the other answer.

user21820

@Knight You said that acceleration is change in velocity over change in time. That cannot be true, and you already do know it. Acceleration is the derivative of velocity w.r.t time. There is no other simpler way to put it.

Knight

08:05

@user21820 YES.

user21820

@CalvinKhor It ought to be closed for being unclear. It says "I know that acceleration is derivative of velocity, but I wonder what that means.". Well, it means just that? No? That's why the question is unclear. As Toby Mak said:

How to ask a good question. Your question needs more details, such as the specific parts of the videos you don't understand. You should also indicate your own background: have you taken any calculus classes before and what did you learn there? — Toby Mak 2 hours ago

Calvin Khor

@Knight I don't know, and we can only guess. This user, who I shall comment is watching us discuss this right now in this chatroom, may well be checking in on you more

@user21820 I agree. It is unclear.

Knight

@CalvinKhor It’s more than enough, Cal.

sai-kartik

the op called his/her teacher jobless

...

Knight

It is no longer a civil platform anymore if I’m inflicted with things like these.

Calvin Khor

08:08

@Knight It doesn't help that you seem to have started to interact with him, instead of the other way round. I don't really know what jobless entails; is teacher not a job?

user21820

@CalvinKhor Yes that's all I meant by "bad question"; I did not mean to imply "question with bad intent", though the "jobless" part may very well be problematic (I can't determine for sure what the asker is trying to say, as it is just as unclear as the rest of the question).

Knight

@CalvinKhor He has mentioned me in Michaels Rosenberg answer and called me a “downvoter” and I have not downvoted a single thing in last 1 month.

user21820

@Knight Have you flagged that comment for moderator attention?

Calvin Khor

@user21820 noted, and all I wanted to do was present a fact (4 close votes, so 4 people think it should be closed) instead of my opinion :)

user21820

@CalvinKhor Now 5; I was the last close-voter. =)

Knight

08:10

@user21820 It’s normal high-school anger that we have when teachers don’t teach us. You remember once a user told you that “My teachers have told me how to solve a limit, but they haven’t explained what a limit is” and then you taught her limits with such a beautiful symbols and concepts

Calvin Khor

:) Hard to keep up and type here at the same time. I still dont have steward for close votes...

user21820

@Knight Oh I see. So "jobless" was simply a wrong choice of word. Ok.

Knight

@user21820 I have flagged the answer.

@user21820 lol :-)

user21820

@Knight No, if a comment is a problem, flag the comment, not the answer.

To flag a comment, click the flag on its left.

Knight

@user21820 I flagged the answer because of that downvote, and I will follow your advice and flag that comment.

user21820

08:13

@Knight I am not talking about the acceleration-related thread. I was replying to:

4 mins ago, by Knight

@CalvinKhor He has mentioned me in Michaels Rosenberg answer and called me a “downvoter” and I have not downvoted a single thing in last 1 month.

Knight

I did it.

user21820

Was it satisfactorily handled?

Knight

Pending

I can understand it sir, i have been receiving multiple downvotes by a user and my chat privileges have been banned and i can't complain to any mod — Arjun yesterday

Calvin Khor

@Knight With regards to the mathematics of your answer I think what @user21820 is pointing out is that you didn't talk about the limitting process

Knight

@CalvinKhor I accept that, but I said it in the beginning that I will not go for calculus symbols and concepts. Because OP new that acceleration is derivative of velocity, but couldn’t understand it so I took the question as “why acceleration is the derivative of the velocity”?

And explained him.

with best of my intellect.

Calvin Khor

08:17

@Knight fair enough, and I don't think enough for a downvote

user21820

@Knight No, that approach does not work contrary to what you think. Acceleration is defined as derivative of velocity. There is no simpler definition you can give for it such that you can then explain "why [it] is the derivative of velocity".

So a failure to understand derivatives automatically leads to a failure to understand acceleration. In my opinion there is no possible shortcut.

Knight

@user21820 True

Calvin Khor

Is it really true that you cannot complain to a mod when your chat account is suspended? I find that highly suspect

user21820

@CalvinKhor It ("you cannot complain to a moderator when your chat account is suspended") is false.

Knight

@CalvinKhor You can, mods even reply to us.

Calvin Khor

08:19

ok, thanks. never been suspended...

user21820

@CalvinKhor Neither have I, but the chat system is separate from SE.

Knight

They talk very nicely and explains the reason for why you have been suspended, (if you ask politely :-) )

user21820

Though usually if you are banned on one main SE site you are also banned from all chat-rooms on the domain related to that site.

Not sure why on earth they did that, but at one point one user was banned from Math SE for a short while and so from Math SE chat-rooms, but not chat-rooms for certain other SE sites.

That's how I know.

Knight

Lol

Calvin Khor

noted :):)

user21820

08:22

And I have no idea which SE sites are in which group.

Knight

Calvin is very active on Meta these days :)

Calvin Khor

its easier than posting on main and irl maths is tiring me out enough :P

Knight

:D

user21820

@CalvinKhor I do most mathematics on Math SE in the chat-rooms rather than on the main site.

=D

It takes far longer for me to type out a polished post on Main.

In chat I can just make mistakes and say "sorry it should be ..."

Just joking; making mistakes is not the reason. =P

Calvin Khor

well theres some truth to it, theres maybe 30+ minutes of "did i get that right" even if the post is following a very standard argument in many of my answers...

user21820

08:30

@CalvinKhor Heh. I actually make plenty of minor mistakes on Main too, and then fix them when pointed out. Sometimes it's even due to repeated revising while typing, such as changing variable names and forgetting one instance...

There was once someone commented on a few-years-old post asking me whether I meant some other variable names, and I no longer remembered what I was thinking when writing the post.

Calvin Khor

I still don't know what I was thinking in one answer from years ago...couldn't give a good response to the years-later-commenter and they seem to have sorted it out and not reply me, so I didn't bother relearning it :D

user21820

Hahaha..

amWhy

13:15

@CalvinKhor What is irl maths? Just curious about the "irl" :-)

Calvin Khor

you are asking @amWhy what maths I do outside of MSE, rather than what irl means, or some other question?

amWhy

@CalvinKhor I'm just trying to understand the comment I responded to: (posting on meta is) "easier than posting on main and irl maths is tiring me out enough."

I'm not always the quickest at understanding acronyms :(

Calvin Khor

oh :) irl = in real life

amWhy

@CalvinKhor Oh, now I feel stupid! :-)

Calvin Khor

i guess i meant, trying to write/read math papers is tiring the math part of my brain

:) :) happens to us all (or at least, to me)

amWhy

13:28

@CalvinKhor All is clear now!

Calvin Khor

glad to hear

i wonder how many acronyms i use date and place me...

user21820

13:45

@CalvinKhor "irl" is quite common across the world, so it's not too bad.

It's more likely that your username will identify you than acronyms.

Calvin Khor

well, i would hope so, since its also my name :P

user21820

Well, for people like me who prefer anonymity (because the internet is a dangerous place), I would hope not. =)

Calvin Khor

I have some anonymous accounts, but I think using my name makes me more accountable for my answers and general behavior (that was the thought, anyway). And people are usually 'professional' on SE

.....I have some anonymous accounts elsewhere, where I want to benefit from being anonymous. I only have the one MSE account :) :) :) :)

user21820

@CalvinKhor That's true. Except, of course, when it is not. I guess you're fortunate if you are unaware of the exceptions. =)

Calvin Khor

I have many screenshots of less than professional behavior targeted at me :P but so far I'm doing alright

user21820