Exam-style question
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How does the concept of waste energy relate to the efficiency of a heat engine?.
- A.Higher waste energy means higher efficiency
- B.Lower waste energy indicates higher efficiency
- C.Waste energy has no impact on efficiency
- D.Waste energy is always converted to work
Model answer
What a good answer should say
- Lower waste energy indicates higher efficiency
Explanation
Why this works
The efficiency of a heat engine increases as waste energy decreases, meaning more of the input energy is converted into useful work.
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