Chapter 15, Problem 17P

To determine

To find : Efficiency of the engine.

Answer to Problem 17P

  $0.39$

Explanation of Solution

Given:

Input energy $=8200$ J

Out-put energy $=3200$ J

Formula Used :

Efficiency $=\frac{\text{output}}{\text{input}}$

Calculation :

Efficiency $=\frac{3200}{8200}=\frac{32}{82}$

  $\Rightarrow$ Efficiency $=0.39$

  $\Rightarrow \%$ Efficiency $=39$

Conclusion:

Therefore, the efficiency will be 39%.