A high-school teacher asks you for assistance in evaluating a science project. The students working on the project have built a small engine, which they measure as producing 5.1 kW of power while rejecting heat at a rate of 5.8 kW. (The students could not figure out how to measure the heat input rate.) The engine receives the heat from a source at 315°C, and the heat is rejected at 30°C. Are the results reported by the students possible?
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