Question

What is the efficiency of the heat engine if the input is 260 J and the useful output is 124.8 J?(1 point)
Responses

52%
52%

48%
48%

35%
35%

33%

Answer 1

The efficiency of a heat engine can be calculated using the formula:

\[
\text{Efficiency} = \left( \frac{\text{Useful Output}}{\text{Input}} \right) \times 100\%
\]

Given that the input is 260 J and the useful output is 124.8 J, we can plug the values into the formula:

\[
\text{Efficiency} = \left( \frac{124.8 \, \text{J}}{260 \, \text{J}} \right) \times 100\%
\]

Calculating this gives:

\[
\text{Efficiency} = \left( \frac{124.8}{260} \right) \times 100\% \approx 48\%
\]

So, the efficiency of the heat engine is **48%**.