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A gasoline engine has a compression ratio of 9.00 and uses a gas for which γ...

A gasoline engine has a compression ratio of 9.00 and uses a gas for which γ = 1.40.

(a) What is the efficiency of the engine if it operates in an idealized Otto cycle?
%

(b) If the actual efficiency is 19.0%, what fraction of the fuel is wasted as a result of friction and energy losses by heat that could by avoided in a reversible engine? (Assume complete combustion of the air-fuel mixture.)

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