Question

an engine absorbs 2000J of heat from a hot reservoir and expels 750J to a cold reservoir during each operating cycle. what is the efficiency of the engine?

Answer 1

Question

We can find the efficiency of the engine by the formula:

$$efficiency = \frac{output}{input} \cdot 100\% = \frac{750(J)}{2000(J)} \cdot 100\% = 37.5\%.$$

Answer: the efficiency of the engine is $37.5\%$.