Recent content by KayEl9

Yeah, it surely is much easier. Physics never stops to amaze me… :) Thanks a lot for all your help, I really appreciate that :)

Well, zero? So should I just calculate as the 5Ω resistor wasn't there and it's just a normal two-branch circuit?

Well... do I conclude right that they are the same? Gotta look to my physics notebook from last year as I don't remember the relation between electrical potential, current and voltage. Thanks for help so far. By the way, if I wanted to solve it using the delta-y transformation (provided I do...

Yeah, I noticed they are 1:2. However, following a consultation with a friend who studied electrotechnics, I managed to do the delta-y transformation and calculate the total resistance, which appears to be 10/3Ω. Now, the next part of the task is to calculate the currents I1 through I6. So my...

So does that mean that resistance on both branches of the A-B part of the circuit will be the same?

Thanks. So do I get it right that the ball bounces back up with the same speed, i.e., 14 m/s, and the time of contact has nothing to do with it?

Thanks, that's interesting. I'm just still not sure how to use that to solve the circuit…

I'm not sure. It shouldn't be if the ball is perfectly elastic. But would that mean that the time of contact is given just to confuse us? :) EDIT: Just thinking - it says that the ball is perfectly elastic, but doesn't say anything about the surface in this regard. Could that mean that the...

Yeah, I've been thinking about that. So does that mean that the ball will bounce with the same speed in opposite direction, and the time of the contact that is given has no effect on this?

Hello. So I've got an electrical circuit on page 4 of this: http://www.iuventa.sk/files/documents/2_olympiady/fo/54.%20rocnik%202012-2013/ulohy%20a%20riesenia/skolske%20kolo/f54skcul13.pdf and I am to calculate the total resistance of the circuit, but I have no idea on how to solve that strange...

Hello. I have an exercise (not exactly homework, it's a physics contest that we are allowed to solve at home, using all possible help we can find) that goes like this: A ball with mass m = 0,10 kg falls vertically on a horizontal non-movable solid surface. Speed of the ball just before the...

What is "s" for length derived from? Hello. I would like to ask what word is the letter "s" indicating length derived from? I can't seem to find it anywhere and I don't know if it is purely arbitrary label, or if it's from some actual word. Thank you very much.

Yes, I realize that. But that doesn't have to prevent me from thinking of the psychical side of it. Anyway, thanks for your answers.

Well, I think I should've explained it in the question :) I'm just thinking about the surface tension because of this video: http://www.youtube.com/watch?v=7ctaA2mERzI" I think it could theoretically be possible if the surface tension was strong enough and not disturbed by things such as...

Hello. I'd like to ask: does syrup increase or reduce the surface tension of water? Thanks.