To calculate power using energy and time the following formula can be used:

Power (W) = Energy (J)

Time (s)

Calculate the following problems to determine the unknowns:

1. What is the power rating of a heater that delivers 20 kJ of heat in 20 s?

2. The average power generation capacity of a hydroelectric power station is 150 MW per day. How much energy is generated in that time period?