An engine does 25 J of work and exhausts 10 J of waste heat during each cycle. What is the engine's thermal efficiency? Express your answer as a percentage.

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An engine does 25 J of work and exhausts 10 J of
waste heat during each cycle.
TH=
What is the engine's thermal efficiency?
Express your answer as a percentage.
17 ΑΣΦ
e=
If the cold-reservoir temperature is 30 °C, what is the minimum possible temperature in °C of the hot reservoir?
Express your answer in degrees Celsius.
?
ΑΣΦ
°C
?
Transcribed Image Text:An engine does 25 J of work and exhausts 10 J of waste heat during each cycle. TH= What is the engine's thermal efficiency? Express your answer as a percentage. 17 ΑΣΦ e= If the cold-reservoir temperature is 30 °C, what is the minimum possible temperature in °C of the hot reservoir? Express your answer in degrees Celsius. ? ΑΣΦ °C ?
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