Question

The Hoover Dam in Nevada, supplied by Lake Mead, generates hydroelectric power for several western states, including the numerous lights in Las Vegas. What statement accurately explains the potential energy that Hoover Dam uses to generate this power?
A) The large number of generators and height of the dam account for the potential energy.
B) The depth of Lake Mead and the large number of generators account for the potential energy.
C) The amount of water released through the dam and the dam's height account for the potential energy.
D) The quantity of water flowing into Lake Mead from the Colorado River accounts for the potential energy.

Answer 1

Answer: 
C).The amount of water released through the dam and the dam's height account for the potential energy.  
because energy is directly proportional to the amount of water released. according to the height of the dam ,the speed of the water will increase.

Answer 2

Potential energy = mgh

where

m = mass

g = acceleration due to gravity

h = height

So more the height higher the potential energy

also

more the mass (amount) of water higher the potential energy

acceleration due to gravity is a constant for earth.

hence we can say that

The amount of water released through the dam and the dam's height account for the potential energy.