Can someone please explain the last question?​

What is a costume plot? why is it important to a film or theater production?

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.

Acorporation gives out its profits as dividends paid to whom?