At Niagara Falls, 6300 metric tons of water fall down 49 m every second. (a) What is the power that could be generated if all of the gravitational potential energy of the falling water could be harnessed? (b) The average home in the United States requires about 1.2 kW of power. How many homes could be powered by this process? (c) Power companies measure energy consumption in units kilowatt-hours. i. Use dimensional analysis to calculate how many joules is in one kilowatt-hour. ii. In kilowatt-hours, how much energy does Niagara Falls generate in one year? iii. In megatons of TNT equivalent, how much energy does Niagara Falls generate in one year?