1. In otherwise empty space, what would happen if the size of the electrostatic force acting between two positively charged objects was exactly the same as that of the gravitational force acting between them?

a) They would attract one another.

b) The net force on each would be zero.

c) They would rotate about their common center of mass.

d) They would repel one another.

2. What would happen if they were moved closer together or farther apart?

a) Their rotation speed would increase or decrease as the inverse of the distance between them increases or decreases.

b) The net force on each will remain zero.

c) The net force on each would increase and decrease with the inverse square of the distance.

d) Their rotation speed would increase or decrease as the distance between them increases or decreases.