Answer
a) $P=2.78psi$
b) $P=5.56psi$
Work Step by Step
$P=\frac{F}{A}$
$F=200lbf$ in both cases
a) $A=72in^2$
Then $P=\frac{200lbf}{72in^2}=2.78psi$
b) $A=\frac{72in^2}{2}=36in^2$
Then $P=\frac{200lbf}{36in^2}=5.56psi$
Thermodynamics: An Engineering Approach 8th Edition
by Cengel, Yunus; Boles, Michael
Published by
McGraw-Hill Education
ISBN 10:
0-07339-817-9
ISBN 13:
978-0-07339-817-4
Chapter 1 - Introduction and Basic Concepts - Problems - Page 43: 1-52E
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