Problem 21.2 A closed system of mass 5 lbm undergoes a process in which there is a heat transfer of 200 ft·lbf from the system to the surrounding. There is no work during the process. The velocity of the system increases from 10 ft/s to 50 ft/s, and the elevation decreases by 150 ft. The acceleration of gravity at this particular geographical location is 32.0 ft/s². Please sketch your system and show all of your work to determine the change in a) kinetic energy of the system, in ft·lbf, b) gravitational potential energy of the system, in ft·lbf, and c) internal energy of the system, in ft·lbf and Btu. Partial Ans: c) 300 < AU<400 ft-lbj

Problem 21.2 A closed system of mass 5 lbm undergoes a process in which there is a heat transfer of 200 ft·lbf from the system to the surrounding. There is no work during the process. The velocity of the system increases from 10 ft/s to 50 ft/s, and the elevation decreases by 150 ft. The acceleration of gravity at this particular geographical location is 32.0 ft/s². Please sketch your system and show all of your work to determine the change in a) kinetic energy of the system, in ft·lbf, b) gravitational potential energy of the system, in ft·lbf, and c) internal energy of the system, in ft·lbf and Btu. Partial Ans: c) 300 < AU<400 ft-lbj

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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Question

Problem 21.2
A closed system of mass 5 lbm undergoes a process in which there is a heat transfer of 200 ft·lbf from the
system to the surrounding. There is no work during the process. The velocity of the system increases from
10 ft/s to 50 ft/s, and the elevation decreases by 150 ft. The acceleration of gravity at this particular
geographical location is 32.0 ft/s².
Please sketch your system and show all of your work to determine the change in
a) kinetic energy of the system, in ft·lbf,
b) gravitational potential energy of the system, in ft·lbf, and
c) internal energy of the system, in ft·lbf and Btu.
Partial Ans: c) 300 < AU <400 ft·lbf

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