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Calculate the efficiency of an engine in a power plant operating between 30C and 350C. Remember that the efficiency is a decimal number less than

Calculate the efficiency of an engine in a power plant operating between 30C and 350C. Remember that the efficiency is a decimal number less than 1.

If the engine with the efficiency calculated above extracted a total energy of 400 MJ from fuel, then how many MJ of energy could be used as useful mechanical energy to operate the engine? ____ MJ mechanical energy

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