A heat engine exhausts 3 000 J of heat while performing 1 500 J of useful work.What is the efficiency of the engine?

Question

Quizplus · Accepted Answer

Efficiency of the heat engine is defined as useful work done divided by the heat energy absorbed. 
Efficiency = (useful work output / heat energy input) x 100%
Efficiency = (1500/3000) x 100% = 50%
Therefore, the engine has an efficiency of 50%, which corresponds to option C.

A Heat Engine Exhausts 3 000 J of Heat While