Al engines operate at less than 100 percent efficiency because they
IO conduct
O emit
OOTD

it is impossible for heat engines to achieve 100% thermal efficiency according to the Second law of thermodynamics. This is impossible because some waste heat is always produced produced in a heat engine, shown in Figure 1 by the term

Explanation:

it can either be 2. or 4. : ) tell me if i'm wrong or right

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