Thinking Like an Engineer: An Active Learning Approach (3rd Edition)
3rd Edition
ISBN: 9780133593211
Author: Elizabeth A. Stephan, David R. Bowman, William J. Park, Benjamin L. Sill, Matthew W. Ohland
Publisher: PEARSON
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Textbook Question
Chapter 10, Problem 9RQ
Use the following phase diagram for questions 7 and 8.
The following phase diagram for the processing of a polymer relates the applied pressure to the raw material porosity.
- Region A or B = porosity is too high or too low for the material to be usable.
- Region C = combinations in this region yield material with defects, such as cracking or flaking.
- Region D = below a pressure of 15 pound-force per square inch [psi] the polymer cannot be processed.
- Region E = optimum region to operate.
There are often multiple ways to solve the same problem; here we look at a few alternative ways to determine the phase of the material and the processability of the material.
- 8. a. In column A and column B, use data validation to restrict the user from entering values outside the valid parameter ranges—pressure: 0–35 psi and porosity: 0–100%.
- b. In column C, develop the equation for the line dividing the phases of Region E and Region C.
- c. In column D, write an expression to determine the phase of the material (phase A–phase E).
- d. In column E, write an expression to determine if the material is processible.
- e. When the conditions of phase E are met, the cell should be highlighted by conditional formatting.
- f. Write an expression in column F to tell the user why the material was rejected. For example, under the conditions of pressure = 25 psi and porosity= 40%, the statement might say “Porosity too low.”
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Chapter 10 Solutions
Thinking Like an Engineer: An Active Learning Approach (3rd Edition)
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