Discuss the relationship between size and weight of an object

Which of the following are appropriate acceleration units?

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?