Question: a. A heat engine does 200 J of work per cycle while exhausting 600 J of heat to the cold reservoir. What is the engines

a. A heat engine does 200 J of work per cycle while exhausting 600 J of heat to the cold reservoir. What is the engine’s thermal efficiency?
b. A Carnot engine with a hot-reservoir temperature of 400°C has the same thermal efficiency. What is the cold-reservoir temperature in °C?

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