Amos runs up a flight of stairs with a total change in energy AEA. Vanessa exerts double the amount of energy in twice the time.
How does Amos's power output, PA compare with Vanessa's power output, Pv?

Atank has a shape of a cone with a radius at the top of 2 m and a height of 5 m. the tank also has a 1 m spout at the top of the tank. the tank is filled with water up to a height of 2 m. find the work needed to pump all the water out the top of the spout. (use 9.8 m/s2 for g and the fact that the density of water is 1000 kg/m3.)