A cylinder-piston apparatus contains 29 kg of air at 30°C. Weights on the piston fix the initial pressure at 20 bar. Find the work done if: a. Some of the weights are quickly removed until external pressure is 5 bar. The temperature remains constant. b. Some of the weights are slowly removed until the external pressure reaches 5 bar. The temperature remains constant. c. The expansion from 20 bar to 5 bar is polytropic, with an exponent of 1.4. Note that if the gas is ideal and PV = constant, then the temperature varies as: 7-11-190 T₁

A cylinder-piston apparatus contains 29 kg of air at 30°C. Weights on the piston fix the initial pressure at 20 bar. Find the work done if: a. Some of the weights are quickly removed until external pressure is 5 bar. The temperature remains constant. b. Some of the weights are slowly removed until the external pressure reaches 5 bar. The temperature remains constant. c. The expansion from 20 bar to 5 bar is polytropic, with an exponent of 1.4. Note that if the gas is ideal and PV = constant, then the temperature varies as: 7-11-190 T₁

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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