A heat engine receives 7,100 J of heat from its combustion process and loses 3,100 J through the exhaust and friction.What is its efficiency?

Question

A heat engine receives 7,100 J of heat from its combustion process and loses 3,100 J through the exhaust and friction.What is its efficiency?
​

Quizplus · Accepted Answer

The efficiency of a heat engine is calculated using the formula: Efficiency = (Work output / Heat input) * 100%. The work output can be found by subtracting the heat lost (3,100 J) from the heat input (7,100 J), which gives 4,000 J. Thus, Efficiency = (4,000 J / 7,100 J) * 100% = 56%.

A Heat Engine Receives 7,100 J of Heat from Its