AUTOMOTIVE TECHNOLOGY-NATEF TASK SHEETS
6th Edition
ISBN: 9780135257418
Author: Halderman
Publisher: PEARSON
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Chapter 29, Problem 6CQ
Cleaning chemicals are usually either an alkaline material or an acid material. Which of the following statements is true?
- a. Both alkalines and acids have a pH of 7 if rated according to distilled water.
- b. An acid is lower than 7 and an alkaline is higher than 7 on the pH scale.
- c. An acid is higher than 7 and an alkaline is lower than 7 on the pH scale.
- d. Pure water is a 1 and a strong acid is a 14 on the pH scale.
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(I) [40 Points] Using centered finite difference approximations as done in class, solve the equation for O:
d20
dx²
+ 0.010+ Q=0
subject to the boundary conditions shown in the stencil below. Do this for two values of Q: (a) Q = 0.3,
and (b) Q= √(0.5 + 2x)e-sinx (cos(5x)+x-0.5√1.006-x| + e −43*|1+.001+x* | * sin (1.5 − x) +
(cosx+0.001 + ex-1250+ sin (1-0.9x)|) * x - 4.68x4. For Case (a) (that is, Q = 0.3), use the stencil in Fig.
1. For Case (b), calculate with both the stencils in Fig. 1 and Fig 2. For all the three cases, show a table as
well as a plot of O versus x. Discuss your results. Use MATLAB and hand in the MATLAB codes.
1
0=0
x=0
2
3
4
0=1
x=1
Fig 1
1 2 3 4 5 6 7 8 9 10
11
0=0
x=0
0=1
x=1
Fig 2
Chapter 29 Solutions
AUTOMOTIVE TECHNOLOGY-NATEF TASK SHEETS
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