Select the correct answer in the box. Spell the words correctly. Differences in materials used for production, methods of operating manufacturing equipment, and performance of workers cause products to differ from each other. What is the term for such differences?

Differences in characteristics of two units of a product produced by the same company is referred to as _ .

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