question: In a hydroelectric dam, water falls 30.0m and then spins a turbine to generate electricity.
a) What is U of 1.0 kg of water? Express your answer with the appropriate units.
Part B: Suppose the dam is 80% efficient at converting the water's potential energy to electrical energy. How many kilograms of water must pass through the turbines each second to generate 54.0MW of electricity? This is a typical value for a small hydroelectric dam. Express your answer using three decimal places.