At one point in space, the electric potential energy of a 15 nc charge is 42 μj . part a) what is the electric potential at this point?
express your answer to two significant figures and include the appropriate units.
part b) if a 20 nc charge were placed at this point, what would its electric potential energy be?
express your answer to two significant figures and include the appropriate units.

In what direction does the medium move relative to the direction of the wave? explain.

Suppose you have a box. which of these is not necessarily a true statement regarding the relationship between the force applied to the box, the work done on the box, and the distance the box is moved? a. if the box is not moved, no force is being applied to the box. b. if no force is applied to the box, no work is done on the box. c. if work is done on the box, then a force is applied to the box. d. if work is done on the box, then the box is moved a distance.

What happens when a rubber rod is rubbed with a piece of fur?