Notes on Chapter 7 examples

70 10 3 2 s 2 32174 lb m ft s ifgh 01341 f10lb hpsijk

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Unformatted text preview: ump bearings. 7- 2 1 min 140 10 5 hp . 7.5 (a) Mass flow rate: 42.0 m 0.07 m m s 4 b mu 2 2 Ek g 127.9 g 2 2 10 3 L 273 K 1m 3 1 mol bg 573 K 101.3 kPa 22.4 L STP 42.0 2 m2 1 kg s 130 kPa 1000 g s 1N 2 1J 1 kg m / s2 29 g 127.9 g s mol 113 J s Nm (b) 127.9 g 1 mol 673 K 101.3 kPa 22.4 L STP s 29 g mu 2 2 Ek 273 K 127.9 g 2 130 kPa 49.32 2 m2 1 kg s 1 mol 1000 g s 2 1 m3 103 4 L 1N (0.07)2 m2 1J 1 kg m / s2 49.32 m s 1558 J / s . Nm E k = E k (400 C) - E k (300 C) = (155.8 - 113) J / s = 42.8 J / s 43 J / s (c) Some of the heat added goes to raise T (and hence U) of the air 7.6 (a) Ep (b) E k . 1 ft 3 62.43 l...
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This document was uploaded on 03/05/2014 for the course CHE 2171 at LSU.

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