Exam-style question
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Describe how the efficiency of a heat engine can be calculated using the work output and energy input.
Model answer
What a good answer should say
- The efficiency of a heat engine is calculated using the formula: efficiency = (useful work output / total energy input) x 100%.
- This shows the proportion of energy converted into useful work.
Explanation
Why this works
This question assesses the ability to apply the concept of efficiency in thermodynamic processes. A strong answer clearly states the formula and its components, demonstrating an understanding of energy conversion.
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