which refers to the ratio of output work to input work of a machine expressed as a percent? total work…

which refers to the ratio of output work to input work of a machine expressed as a percent? total work wattage efficiency power

which refers to the ratio of output work to input work of a machine expressed as a percent? total work wattage efficiency power

Answer

Brief Explanations:

Efficiency is defined as the ratio of output work to input work of a machine, often expressed as a percentage. Total work is the sum of all work done, wattage is a measure of power (rate of doing work), and power is work - done per unit time.

Answer:

C. efficiency