Recent content by joemok

Won't B makes A's potential higher than 0v if there are no charge flowing into A? Even though it is not a complete circuit, is it possible for some charge flowing into A?

Thank you. But i am still curious about what is wrong with my arguments that negative charge on A will increase. Can you explain to me?

i really need help. Please say something about the approaches, is it valid?

Homework Statement A is an earthed metal plate while B is a positively charged metal plate parallel to A. The separation between the plates is much less than the length of each plate. If A is moved closer to B, what would happen to the electric potential of B and the electric field strength...

Second = 30.0*3=90.0 (cm) Third= 30.0*5 = 150.0(cm) u can draw graphs to know why.

U probably used a wrong equation F = GMm/r^2, that is it, there should not be any square of mass

It is simply an experimental fact as i know. U may want to know more about the experiment, the Michelson-Morley experiment.

So u mean the force is acting on the surface of contact. But, how can a force separately act on two object with magnitude the same as the apply one?

i am confused about where forces act on a pulley. IF the pulling forces act on the edge or bottom? Also, I don't know why when we pull one end of the rope, we apply an upward force on the pulley and on the other hand the force, tention, act on another end also. Is the Force routed like a...

This is because the cold object has a much bigger mass than the hot object. We should think heat as the energy of transfer