Exam-style question
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How can the efficiency of a heat engine be calculated?.
- A.By dividing the work output by the heat input
- B.By adding the work output and heat input
- C.By multiplying the work output by the heat input
- D.By subtracting the work output from the heat input
Model answer
What a good answer should say
- By dividing the work output by the heat input
Explanation
Why this works
The efficiency of a heat engine can be calculated by dividing the useful work output by the total heat input. This ratio indicates how effectively the engine converts heat energy into work, which is essential for evaluating the performance of thermodynamic systems.
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