Recent content by shirel

My teacher has already shown it throught a video clip (on the computer), as an example. So I have to make other experiments..

ohh I should derivate the function! thank you :)

Sounds good, thank you!

Hi, I don't understand why dV/dr=-E As far as I know: V=kq/r E=Kq/(r^2) so V/r becomes to be E and not -E.

Hi clem, first of all thank you very much! Unfortunately, my physics teacher has already shown us these few execrsies in class, as an example for the excersises I should demonstarte.. :rolleyes: If you/ someone else still have more ideas, i'll really appreciate your help.

Hi, I'm looking for ideas for experiments, which use both centripetal force and water properties. (I need it as a part of my project in physics) Any suggestion would be greatly appreciated.

Thank you The Dagda, I'll consider it. randeezy, why do you say it is taking one step forward and two steps back?

haha no :-p I'm just trying to use a slinky, since I want it to be also a part of an electromagnet.

Thank you. Actually, expanding and contracting aren't my intention. I just need to use a slinky in order to block radio waves/sound waves, which are coming out of a tape recorder.

I didn't read your post right through, but still I encountered 2 difficulties: 1) How could you assume that y=z=0? 2) In order to solve equation, which includes 3 variables, you need another 2 equations..

Hi, I've wondered if there is a possibility to create a Faraday's cage with a metallic Slinky instead of using a metallic mesh? Thanks in advanced.

Unfortunately, I have to use water as an electrical insulator (or any other liquid). I have to build an electrical circuit in water. I'm not dealing with dangerous levels of electricty.

What do you mean by keeping it pure? If I get pure water, should I keep it some way?Thank you both!

Hi, I'm looking for an inexpensive liquid, that should be used as an insulator. My first pondering was if there is a way of converting water to insulators. Thanks in advanced.

Thank you very much I'll really appreciate this !