College Physics (4th Edition)

Published by McGraw-Hill Education
ISBN 10: 0073512141
ISBN 13: 978-0-07351-214-3

Chapter 9 - Multiple-Choice Questions - Page 360: 8


The correct answer is: (a) $20~cm~Hg$

Work Step by Step

$P_{abs} = P_g+P_{atm}$ The absolute pressure of the gas is $20~cm~Hg+76~cm~Hg$. The gauge pressure is the difference between the absolute pressure and the atmospheric pressure. Therefore, the gauge pressure is $20~cm~Hg$ The correct answer is: (a) $20~cm~Hg$
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