A Carnot engine has an efficiency of \( 1 / 6 \). When the temperature of the \( \operatorname{s...

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A Carnot engine has an efficiency of \( 1 / 6 \). When the temperature of the \( \operatorname{sink} \) is reduced by \( 62^{\circ} \mathrm{C} \), its efficiency is doubled. The temperatures of the source and the sink are respectively,
(a) \( 62^{\circ} \mathrm{C}, 124^{\circ} \mathrm{C} \)
(b) \( 99^{\circ} \mathrm{C}, 37^{\circ} \mathrm{C} \)
(c) \( 124^{\circ} \mathrm{C}, 62^{\circ} \mathrm{C} \)
(d) \( 37^{\circ} \mathrm{C}, 99^{\circ} \mathrm{C} \)
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