Chapter_1

# Chapter_1 - Chapter 1 Supplemental Problems 1 These...

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Chapter 1 Supplemental Problems 1 These problems will not be collected or graded, they are simply provided for additional practice. From Chapter 1 of Cengel and Boles: 8E 9 34E 39E 50 53 63 91

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1-8E The weight of a man on earth is given. His weight on the moon is to be determined. Analysis Applying Newton's second law to the weight force gives lbm 4 . 180 lbf 1 ft/s lbm 174 . 32 10 . 32 lbf 180 2 2  g W m mg W Mass is invariant and the man will have the same mass on the moon. Then, his weight on the moon will be lbf 30.7 2 2 lbm 174 . 32 lbf 1 ) 47 . 5 )( lbm 4 . 180 ( W 1-9 The interior dimensions of a room are given. The mass and weight of the air in the room are to be determined. Assumptions The density of air is constant throughout the room. Properties The density of air is given to be = 1.16 kg/m 3 . Analysis The mass of the air in the room is kg 334.1 ) m 8 6 )(6 kg/m (1.16 3 3 V m Thus, N 3277 2 2 m/s kg 1 N 1 ) m/s kg)(9.81 (334.1 W 1-23C For a system to be in thermodynamic equilibrium, the temperature has to be the same throughout but the pressure does not. However, there should be no unbalanced pressure forces present. The increasing pressure with depth in a fluid, for example, should be balanced by increasing weight. 1-25C A process during which the temperature remains constant is called isothermal; a process
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## This note was uploaded on 09/05/2010 for the course MEEN 315 taught by Professor Ramussen during the Summer '07 term at Texas A&M.

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Chapter_1 - Chapter 1 Supplemental Problems 1 These...

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