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← ScienceWhich risk increases when a Carnot engine runs indefinitely?
A)Increased entropy within the system✓
B)Decreased engine efficiency over time
C)Reversible work output amplification
D)Decreased thermal energy input needed
💡 Explanation
Increased entropy is inevitable due to the second law of thermodynamics because perpetual motion introduces inefficiencies via friction and imperfect heat transfer despite operating on the Carnot cycle; therefore entropy increases steadily rather than remaining constant as ideal Carnot conditions suggest.
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