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An engine, shown in Fig P3.81, consists of a 100−kg cast iron block with a 20−kg aluminum head, 20kg of steel parts, 5 kg of engine oil, and 6 kg of glycol (antifreeze). All initial temperatures are 5cC, and as the engine starts we want to know the final uniform temperature if it receives 5 kW of heat during 15 min.

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FUNDAMENTALS OF THERMODYNAMICS
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