The Horseshoe Falls on the Niagara River in Ontario are about 48 m high and 780 m wide. The water at the top of the falls is moving at 9.0 m/s and has a depth of about 0.80 m as it goes over the falls. a. If the density of water is 1000 kg/m3

, what mass of water goes over the falls every second?

b. What is the change in gravitational energy of this mass of water? c. If the efficiency of a hydro-electric generator is 95%, and it is able to use 25% of the water, how many kilowatts of electricity could be produced from this water?