You know that a cetrain electroscope is charged because the foil extends when there is nothing near to influence it. when a balloon rubbed with fur is brought near (but not near to change the net charge on the electroscope), the gold foil is seen to move slightly downward. Is the change on the electroscope + or -? Please explain by only using words and not diagrams.
Ok, I think the charge is negative, but I don't know how to explain it more in detail please explain.
Jen -- your subject is science and should have been typed on the School Subject line.
Science tutors have no way of knowing whether or not they can answer your question with that subject line.