A balloon is filled with air from an initial radius of 1.2 m until it reaches a

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A balloon is filled with air from an initial radius of 1.2 m until it reaches a radius of 4 m. The pressure is related to the radius by P(r) = 120 - 2(r - 1.2)2 kPa. Calculate the work. (The surface area of a sphere is 4 πr2.)
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Thermodynamics for Engineers

ISBN: ?978-1133112860

1st edition

Authors: Kenneth A. Kroos, Merle C. Potter

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