What mass of coppe is deposited on the cathode of an electrolytic cell if a current of 2.00 A is passed through a solution of CuSO4 for a period of 20.0 minutes

A2-kg bowling ball is 1 meter off the ground on a post when it falls. just before it reaches the ground,its traveling 4.4 m/s. assuming that there is no air resistant, which statement is true a. the initial potential energy is less then the final kinetic energy b. the mechanical energy is not conserved c. the mechanical energy is conserved d. the initial potential energy is greater than the final kinetic energy