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A Car's Engine Is 20% Efficient

Question 72

Multiple Choice

A car's engine is 20% efficient.When cruising,the car encounters an average retarding force of 1000 N.If the energy content of gasoline is 40 megajoules per liter,how many kilometers per liter does the car get?


A) 14
B) 12
C) 10
D) 8
E) none of these

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