Multiple Choice
A Carnot engine with an efficiency of 70% is cooled by water at 10°C. What temperature must the hot reservoir be maintained at?
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The Carnot Cycle
Multiple Choice
A theoretical heat engine in space could operate between the Sun's 5500°C surface and the –270.3°C temperature of intergalactic space. What would be its maximum theoretical efficiency?
A
99.98%
B
95.1%
C
99.95%
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