ES 202 - Homework Assignments & 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 from Text Answers
1 no homework -
2 5-64E 47.4 oF, 0.0479 ft2
5-84 267 oC
3 5-104 0.864 kg/s
5-122 103 kW, 133 oC
4 3-30 no answers given to table lookup problem
3-31 no answers given to table lookup problem
5-81 6.92 kg/s
5 3-57 49.9 kg, 134 oC, 131 MJ
3-63 1.33 MPa
5-105 0.107 kg/s
6 3-106 6304 kJ/kg, 6288 kJ/kg, 6110 kJ/kg
5-87 0.674 kg/s
7-67 -0.428 kJ/kg-K, 125.4 kJ/kg
7 7-68 (find entropy generation rate instead) 0.820 W/K
7-69 28.81 kJ/K (You do NOT need to know the ideal gas.)
8 no homework (preparation for Exam 1) -
9 no homework (Merry Christmas!) -
10 7-98 89.8%
7-102 646 kPa, 703 kW
7-143 4.44 kW, 5.26 kW
11 8-105 0.793, 40.2%, 165 kg/s
8-106 0.874, 34.1%, 194 kg/s
12 8-135 0.322, 3.96, 1.263 kW
Repeat 8-135 with an isentropic compressor efficiency of 85% 0.322, 3.37, 1.488 kW
13 no homework (Lab 1 project work)  
14 2-52E 64.3 psia
2-59 123 kPa
2-75 47 cm
15 11-16E 49,500 lbm
11-21 0.379 m, 0.524 m
16 11-30 1053 kg/m3 (the 10-cm label on the figure should be "9.5 cm")
11-34 1050 N
17 no homework  
18 12-6 77.6%, 72.8%
12-46 33.8 m/sec
19 no homework (Exam 2)  
20 12-67 0.204 m, 40 W
12-74 201 kW,  50.9 m/sec
Dimensional Analysis on Pipe Friction no answer provided
21 Drag Analysis over Entry Length (a) 2 Uo  (b) 1.5 r Uo2  (c) 7 r Uo2 p R2 / 6
10-28 0.565 N
22 Friction Factor for a Laminar Pipe Flow no answer provided
14-41 4.9 W
14-49 4.75 - 4.83 MPa, 726 - 738 m, 1.07 - 1.09 kW (low: Haaland, high: Moody)
23 14-43 (a) 16.2 cm3/sec  (b) 10 cm3/sec  (c) 22.4 cm3/sec
14-80 2.95 kW
24 14-75 0.00597 m3/s
25 no homework (Study for Exam 3 + Lab 3 report)  
26 no homework (Exam 3)  
27 15-49 17 N, 60N
15-57 0.969 m, 6.85 mm
28 15-33 36.4 m/sec
15-66 13.7 m/sec
29 15-92 (a) 34.7 m/s  (b) 53100 N
30 no homework