I really need help on this question!

What will a positive and a negative charge do if they are separated from each other?

Agraduated cylinder contains 63.0 ml of water. a piece of gold, which has a density of 19.3 g/ cm3, is added to the water and the volume goes up to 64.5 ml. calculate the mass in grams of the gold that was added to the water. explain how you got your answer.

Amaterial that provides resistance to the flow of electric current is called a(an) (1 points)