Physics

Problem

A reservoir behind a dam contains

2.0\times10^{6}\,\text{m}^3

of water. The water surface is

45\,\text{m}

above the turbines. Estimate the gravitational potential energy stored in the water relative to the turbines. (Density of water

= 1000\,\text{kg/m}^3

g = 9.8\,\text{m/s}^2

) a)

9.0\times10^{11}\,\text{J}

8.8\times10^{11}\,\text{J}

4.4\times10^{11}\,\text{J}

1.0\times10^{12}\,\text{J}