ES 202 - Homework Answers

Remarks:
1. Your instructors reserve the right to assign different homework problems for the lecture covered.
2. Answers to conceptual questions will not be given here.
Lecture # Problems Answers
1 - -
2 5-62E 47.4 deg F, 0.0479 sq. ft
5-75 267 deg C
3 5-92 0.864 kg/s
5-107 103 kW, 133 deg C
4 3-28 no answers given to table lookup problem
3-29 no answers given to table lookup problem
5 3-56 179.91 deg C, -0.128 m3
3-57 1.325 MPa
5-72 6.92 kg/s
6 5-61 5.83 kg/s, 590 m/s, 15.0 cm2
5-93 0.107 kg/s
7 3-93 (a) 6295.3 kJ/kg, (b) 6288 kJ/kg, (c) 6100 kJ/kg
5-78 0.674 kg/s
8 7-62 -0.428 kJ/kg-K, 125.4 kJ/kg
7-63 0.820 W/K
9 7-40 7.93 kW
  7-102 4.44 kW, 5.26 kW
10 7-87 0.898
  7-90 646 kPa, 352 kW
11 8-103 0.793, 0.402, 235 kg/sec
  8-104 0.874, 0.341, 278 kg/sec
12 8-132 0.322, 3.96, 1.263 kW
  8-133 0.322, 3.37, 1.488 kW
15 2-41 70.6 kPa
  2-46 404 kPa
  2-62 47 cm
16 10-11 3550 N, 5.001 m
  10-19 0.379 m, 0.524 m
17 10-37 522 kN (remember weight of gate - text answer ignores this)
  10-28 1053 kg/m3
  10-32 679 N
18 11-5 1.77 kJ/kg, 885 MW
  11-6 77.6%. 72.8%
19 11-43 28.6 m/sec
  11-45 28.3 m/sec
20 11-63 0.204 m, 40 W
  11-70 50.9 m/sec, 201 W
21 9-12 derivation, 0.942 N
  12-4C derivation
22 12-9C derivation
  12-25 188.2 kPa, 19.19 m, 0.710 W
  12-35 4.8 W
  12-42 4.75-4.83 MPa, 726-738 m, 1.068-1.090 kW (low-Haaland, high-Moody)
23 12-72 3.23 kW
  12-79 218 W
24 11-105 derivation
25 13-12C, 13C, 41C concepts
  13-40E 0.567 hp, 4.54 hp
27 13-33 36.4 m/sec
  13-47 17.18 N, 59.8 N
  13-54 0.969 m, 6.85 mm
28 13-56C concept
  13-62 20.4 N
  13-63 13.7 m/sec
29 13-72C concept
  13-88 34.7 m/sec, 53100 N