8. A conveyer belt moves sand, initially at rest, to a height H = 110.0 m by doing nonconservative work. The sand exits the belt at a speed of 3.00 m/s. If the belt moves 1,000 kg of sand each minute, how much power P is supplied by the motor which moves the belt? Ignore any friction in the system. Data: 1.00 kW =1,000 W A) P=14kW B) P=18kW C) P=12kW D) P=15kW E) P=19kW