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10 questions from this quiz
Ratio of useful output to total input
useful energy outputtotal energy input\frac{useful\ energy\ output}{total\ energy\ input}total energy inputuseful energy output
useful power outputtotal power input\frac{useful\ power\ output}{total\ power\ input}total power inputuseful power output
20%
40%
Reducing waste output
Absorbing thermal waste as input energy
Total energy input
Lubrication
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