1. A large commercial refrigerator has a coefficient of performance of 4.70 and is driven by a 7.00 hp electric motor. Determine the refrigeration capacity of this unit in tons of refrigeration.
2. The air conditioning unit for a building uses a water chiller with a capacity of 12.0 tons of refrigeration. Determine the coefficient of performance of this unit if it is driven by a 14.0 hp electric motor.