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← ScienceIn a Carnot heat engine operating with irreversible steps, which outcome results from frictional losses driving down system temperature?
A)Work output is reduced✓
B)Efficiency always stays constant
C)Heat input is unlimited
D)The cycle turns reversible
💡 Explanation
The work output decreases because `the second law efficiency` measures actual performance divided by ideal Carnot values; frictional processes raise the system's entropy, so the useful converted energy lessens, therefore lowers the output rather than creating energy or becoming stable.
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