An automobile has a gas mileage of 30 miles/gal when traveling at 60 mph on a flat

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An automobile has a gas mileage of 30 miles/gal when traveling at 60 mph on a flat road with no head wind. Gas contains about 21,000 Btu/lbm with a density of 45 lbm/ft3. Estimate the efficiency of the engine if it produces
a) 17 hp,
b) 14 hp,
c) 12 hp under those conditions.
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Thermodynamics for Engineers

ISBN: ?978-1133112860

1st edition

Authors: Kenneth A. Kroos, Merle C. Potter

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