Author Question: A new electric power plant has an efficiency of 42%. For every 100 barrels of oil needed to run the ... (Read 61 times)

ap345 · **on:** Aug 6, 2020

Question 1

A lawn mower has a 6-horsepower engine (1 HP = 750 W). If the engine has an efficiency of 20%, and the throttle is such that the engine cycles 10 times a second, the heat that is expelled in one cycle is

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1 800 J

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2 000 J

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2 200 J

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2 400 J

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2 250 J

Question 2

A new electric power plant has an efficiency of 42%. For every 100 barrels of oil needed to run the turbine, how many are essentially lost as waste heat (in barrels of oil) to the environment?

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21

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42

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58

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10

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79

ladyjames123 · **Reply #1 on:** Aug 6, 2020

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