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Which constraint increases when a Carnot engine's heat reservoirs equalize?

A)Reversible power output decreases rapidly
B)Internal friction increases exponentially
C)Thermal conductivity rises asymptotically
D)Irreversible heat loss drops linearly

💡 Explanation

The Carnot engine's efficiency relies on a temperature difference; the decreasing temperature gradient causes the reversible power contribution of the Carnot cycle to diminish because less energy is available for converting useful work. Therefore, the reversible power drops, rather than other changes because of constant friction.

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