As shown in Fig.P1.41m, air is contained in a vertical piston-cylinder assembly fitted with an electrical resistor.

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As shown in Fig.P1.41m, air is contained in a vertical piston-cylinder assembly fitted with an electrical resistor. The atmosphere exerts a pressure of 14.lbf/in2 on the top piston, which has a mass of 100 lb and face area of 1 ft2. As electric current passes through the resistor, the volume of the air increases while the piston moves smoothly in the cylinder. The local acceleration of gravity is g= 32.0ft/s2. Determine the pressure of the air in the piston-cylinder assembly, in lbf/in.2 and psig.


Piston Pam- 14.7 Ibflin mpeston = 100 Ib Pistng =I Air
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Thermodynamics An Engineering Approach

ISBN: 978-0073398174

8th edition

Authors: Yunus A. Cengel, Michael A. Boles

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