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First, calculate the gravitational potential energy at the top of the hill:
Gravitational PE = mgh
Gravitational PE = 500 kg * 9.81 m/s^2 * 59.6 m
Gravitational PE = 292,338 J
Next, calculate the gravitational potential energy at the bottom of the valley:
Gravitational PE = mgh
Gravitational PE = 500 kg * 9.81 m/s^2 * 0 m (height at the bottom of the valley is 0)
Gravitational PE = 0 J
Therefore, the amount of gravitational potential energy at the top of the hill is 292,338 J, and at the bottom of the valley, it is 0 J.