fluid_mechanics

ANS-2
Answers to Selected Even-Numbered Homework Problems
2.70 3.55 m
2.72 1a2 2.11 m; 1b2 941 kN
2.74 78.5 kN; 2.03 m below free surface
2.76 102 ft lb
2.78 48.2 ft; 61.1 ft; 71.8 ft; 81.1 ft; 89.1 ft
2.84 20,200 lb
2.86 7.77 10 9 lb acting 406 ft up from base of dam
2.88 64.4 kN
2.90 60.8 kN; 0.100 m below center of tank end wall
2.92 337 lb, 882 lb
2.94 485 kN
2.98 1a2 786,000 lb; 1b2 315,000 lb
2.100 54,600 lb
2.104 2480 kg
2.106 681 lb up; 6.22 ft to right of A
2.108 89.5
2.110 8.63 fts 2
2.112 1a2 68.9 lbft 2 ; 1b2 57.4 lb
2.114 37.4 deg
2.116 h a/g
2.118 5.76 ft
2.120 28.8 kPa
Chapter 3
3.2 13.7 ms
3.4 1a2 19411 x2 62.4 lbft 3 ; 1b2 41.2 psi
3.6 30.0 kPam
3.8 0.838 psift; 0.0292 psift
3.10 1a2 2ra 2 V 2 0 [1 1ax2 2 ] x 3
1b2 p 0 rV 2 0 [1ax2 2 1ax2 4 2]
3.14 12.0 kPa; 20.1 kPa
3.16 1a2 4.97 lbft 3 ; 1b2 0.681 lbft 3
3.22 3.21 Nm 2
3.24 4.50 kPa
3.26 30 deg
3.28 0.14 in.
3.30 194 mph
3.32 3.26 m
3.36 Tank 1a2
3.38 1248 lbft 2
3.40 h 0
3.44 43.0 psi
3.46 10.7 s
3.48 1a2 0.223 ft; 1b2 9.22 lbft 2
3.50 3.19 ft
3.52 0.0156 D 2 [10.12 4 D 4 12
] m 3 s when D m
3.54 2.35 m; 11.9 m
3.56 2.54 10 4 m 3 s
3.58 hH 1 [1 1dD2 4 ]
3.60 1a2 3.98 ft; 1b2 36.0 fts, 510 lbft 2
3.62 86.3 Pa
3.64 1.31 ft
3.66 8.11 psi
3.68 1a2 0.0696 m 3 s; 1b2 0.574 m
3.70 HH 0 111 cxL2 12 , where
2
c 2g H2 O d maxrV 0
3.72 0.0132 m 3 s
3.74 0.346 ft 3 s, 7.89 10 4 slugss; 0.0254 lbs
3.76 4
3.78 0.141 ft 3 s, 499 lbft 2 , 312 lbft 2 , 312 lbft 2
3.80 0.37 m
3.82 7.53 ft
3.84 1.38 ft 3 s
3.86 0.351 ft 3 s
3.88 36.5 s
3.92 404.5 kPa
3.94 9.10 10 3 m 3 s; 57.9 kPa
3.96 2.00 10 4 m 3 s; 0.129 m
3.98 155 Nm 2
3.102 0.174 m 3 s
3.106 6.10 10 3 m 3 s
3.108 1.016 in.
3.110 3.46 Q 0
3.112 145 ft 3 s
Chapter 4
4.6 5 fts; 1x 2 8x 252 12 fts
4.8 20 fts for any x, y; 90 deg, 45 deg, 0 deg
4.10 y 2 x c
4.12 y e 1x2 2x2 1
4.14 1a2 0.712, 8.50; 1b2 1.69 fts
4.18 xh 1u 0 v 0 23ln1h1h y2 yh 4
4.20 10 fts, 9 fts, 6 fts, 4 fts
4.22 a ; a y 1V 0/2 2 x 1V 0/2 2 x
y
4.24 a x x; a y 8x 2 y 2 14x 2 y 12; a z 1x 4x 2 y 2 2
4.26 1a2 4 fts 2 , 2 fts 2 ; 1b2 negative
4.28 10 fts; 10 fts 2
4.30 1.65 10 11 fts 2 ; 5.12 10 9
4.32 V 0 11 x/23ce ct 1V 0/211 e ct 2 2 4;
c 0.490 s 1
4.34 33.8 fts 2 ; 1.05
4.36 1225x 1502 ms
2 ; 0; 1225x 1502 ms
2 ;
150 ms 2 ; 375 ms 2
4.42 0, Kr
3
4.44 19V 2 0 4a2 sin cos ; 19V 2 0 4a2 sin 2 ; 0 deg; 90 deg
4.46 14V0 2
a2 sin cos ; 14V 2 0 a2 sin 2
4.48 1a2 0.4 fts 2 , 0; 1b2 1.28 fts 2 , 2.88 fts 2 ;
1c2 1.34 fts 2 , 2.88 fts 2
4.50 3.13 10 5 ms
2 ; 2.00 10 3 ms
2
4.52 25,600 fts 2 ; 25.0 fts 2
4.54 40 mihr
4.56 1a2 2.5 Fhr; 1b2 1.25 Fhr; 1c2 10 Fhr
4.60 5.0 m 3 s
4.62 132 ft 3 s
4.66 2V 0 hb
3
4.72 7.14 î slug ft s 2
Chapter 5
5.6 3.66 slugss
5.8 1.70 fts
5.10 decrease