Question

Two electrically-charged spheres are suspended from insulated threads a certain distance from each other. There is a certain amount of electrostatic force between them. Describe specifically (not just increase or decrease) what happens to this force in each of the scenarios below.
A: The charge on one sphere is reduced by half.
B: The charge on both spheres is doubled.
C: The distance between the spheres is increased by factor of three.
D: The distance between the spheres is decreased to one-forth.
E: The charge of each sphere is doubled and the distance between them is doubled.