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In 1790 John Curr of Sheffield, England, made an atmospheric steam engine with a 61.0-inch diameter piston and an 9.50 ft stroke. The engine operated with a mean effective piston pressure of 7.00 lbf/in² and ran at 12.0 strokes per minute. It produced a duty of 9.38 million.

Determine (a) the thermal efficiency,

(b) the horsepower output, and

Ignore the boiler feed pump power requirement.

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Category:- Physics
Reference No.:- M92102230

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