EBK NUMERICAL METHODS FOR ENGINEERS
7th Edition
ISBN: 9780100254145
Author: Chapra
Publisher: YUZU
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Chapter 20, Problem 26P
The concentration of total phosphorus
| p | c | |
| Lake Superior | 4.5 | 0.8 |
| Lake Michigan | 8.0 | 2.0 |
| Lake Huron | 5.5 | 1.2 |
| Lake Erie: West Basin Central Basin East Basin |
39.0 19.5 17.5 |
11.0 4.4 3.8 |
| Lake Ontario | 21.0 | 5.5 |
The concentration of chlorophyll a indicates how much plant life is suspended in the water. As such, it indicates how unclear and unsightly the water appears. Use the above data to determine the relationship of c as a function of p. Use this equation to predict the level of chlorophyll that can be expected if waste treatment is used to lower the phosphorus concentration of western Lake Erie to 10
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Topic : Mixture Flow Problem
A tank initially holds 100 gal of salt solution in which 50 Ib of salt
has been dissolved. A pipe fills the tank with brine at the rate of
3 gpm, containing 2 lb of dissolved salt per gallon. Assuming
that the mixture is kept uniform by stirring, a drain pipe draws out
of the tank at 2pm. Find the amount of salt at the end of 30
minutes. Ans. 171.24 Ib
39%
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Q2
Q2\ determine the magnitude and
coordinate direction angles of the resultant
force?
2 m
500 N
600N
4 m
B
4 m
8 m
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Project 1
100
20.
150
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500
550
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650
CUPONTHFC-134a
700
200.
0.0016 1-
00018
10.
Pressure-Enthalpy
0.0014
000124
0.0020
8.
0.0030
100.
80.
6.
Diagram
volume-0.0040 mikg
(SI Units)
0.0060
0 0080
0.010
60.
40.
2.
0.015
0 020
20.
0030
0.8
0.040
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8.
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0.8
0.06
060
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Enthalpy (kJ/kg)
Refrigerant HFC-134a as the working fluid
- Ideal cycle operation condition is assumed
Cycle is operated at high pressure line of 0.8 MPa
Cycle is operated at low temperature line of – 10° C
- Flow rate is 0.1 kg/sec
The head of the department in the company that you are working in asked you to make use of pressure -
enthalpy chart provided for HFC-134a refrigerant
a. Construct didactic sketches, showing the operating principles of a refrigeration system
Pressure (bar)
4.
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091 Ti
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Chapter 20 Solutions
EBK NUMERICAL METHODS FOR ENGINEERS
Ch. 20 - 20.1 Perform the same computation as in Sec. 20.1,...Ch. 20 - You perform experiments and determine the...Ch. 20 - 20.3 It is known that the tensile strength of a...Ch. 20 - Prob. 4PCh. 20 - 20.5 The specific volume of a superheated steam is...Ch. 20 - Prob. 6PCh. 20 - In Alzheimers disease, the number of neurons in...Ch. 20 - 20.8 The following data were taken from a stirred...Ch. 20 - Prob. 9PCh. 20 - Concentration data were taken at 15 time points...
Ch. 20 - Prob. 11PCh. 20 - The molecular weight of a polymer can be...Ch. 20 - 20.13 On average, the surface area A of human...Ch. 20 - 20.14 Determine an equation to predict metabolism...Ch. 20 - 20.15 Human blood behaves as a Newtonian fluid...Ch. 20 - 20.16 Soft tissue follows an exponential...Ch. 20 - 20.17 The thickness of the retina changes during...Ch. 20 - 20.18 The data tabulated below were generated from...Ch. 20 - The shear stresses, in kilopascals (kPa), of nine...Ch. 20 - 20.20 A transportation engineering study was...Ch. 20 - The saturation concentration of dissolved oxygen...Ch. 20 - For the data in Table P20.21, use polynomial...Ch. 20 - 20.23 Use multiple linear regression to derive a...Ch. 20 - 20.24 As compared to the models from Probs. 20.22...Ch. 20 - 20.25 In water-resources engineering, the sizing...Ch. 20 - 20.26 The concentration of total phosphorus and...Ch. 20 - 20.27 The vertical stress under the corner of a...Ch. 20 - Three disease-carrying organisms decay...Ch. 20 - 20.29 The mast of a sailboat has a cross-sectional...Ch. 20 - 20.30 Enzymatic reactions are used extensively to...Ch. 20 - 20.31 Environmental engineers dealing with the...Ch. 20 - An environmental engineer has reported the data...Ch. 20 - The following model is frequently used in...Ch. 20 - 20.34 As a member of Engineers Without Borders,...Ch. 20 - 20.35 Perform the same computations as in Sec....Ch. 20 - 20.36 You measure the voltage drop V across a...Ch. 20 - Duplicate the computation for Prob. 20.36, but use...Ch. 20 - The current in a wire is measured with great...Ch. 20 - 20.39 The following data was taken from an...Ch. 20 - It is known that the voltage drop across an...Ch. 20 - Ohms law states that the voltage drop V across an...Ch. 20 - 20.42 Repeat Prob. 20.41 but determine the...Ch. 20 - 20.43 An experiment is performed to determine the...Ch. 20 - Bessel functions often arise in advanced...Ch. 20 - 20.45 The population of a small community on the...Ch. 20 - Based on Table 20.4, use linear and quadratic...Ch. 20 - 20.47 Reproduce Sec. 20.4, but develop an equation...Ch. 20 - 20.48 Dynamic viscosity of water is related to...Ch. 20 - 20.49 Hooke’s law, which holds when a spring is...Ch. 20 - 20.50 Repeat Prob. 20.49 but fit a power curve to...Ch. 20 - The distance required to stop an automobile...Ch. 20 - An experiment is performed to define the...Ch. 20 - The acceleration due to gravity at an altitude y...Ch. 20 - The creep rate is the time rate at which strain...Ch. 20 - 20.55 It is a common practice when examining a...Ch. 20 - The relationship between stress and the shear...Ch. 20 - The velocity u of air flowing past a flat surface...Ch. 20 - 20.58 Andrade’s equation has been proposed as a...Ch. 20 - Develop equations to fit the ideal specific heats...Ch. 20 - 20.60 Temperatures are measured at various points...Ch. 20 - 20.61 The data below were obtained from a creep...
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