Select the statement which correctly describes scientific laws. scientific laws are the result of testing theories and proving them to be facts. scientific laws interpret and explain natural events. scientific laws describe phenomenon that can be observed in nature. scientific laws explain scientists' opinions of why events occur in nature.

A75-hp (shaft output) motor that has an efficiency of 91.0 percent is worn out and is to be replaced by a high-efficiency motor that has an efficiency of 95.4 percent. the motor operates 4368 hours a year at a load factor of 0.75. taking the cost of electricity to be $0.12/kwh, determine the amount of energy and money saved as a result of installing the high-efficiency motor instead of the standard motor. also, determine the simple payback period if the pu