10000 J of heat energy is absorbed per cycle by a diesel engine that is 11% efficient. How much energy does it expel to the environment per cycle? (J)

8900 J

Explanation:

Let heat absorbed be Q1 and heat rejected be Q2.

Q1 = 1000 J, efficiency η = 11% = 0.11

Then, Efficiency of engine can be found be using the following formula,

⇒

Therefore, energy does it expels to the environment per cycle = 8900 J

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i think the answer would be b

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