Essential University Physics: Volume 1 (3rd Edition)

Published by Pearson
ISBN 10: 0321993721
ISBN 13: 978-0-32199-372-4

Chapter 14 - Exercises and Problems - Page 263: 58


$ x = 88.99 \ m$

Work Step by Step

We know that the intensity of the wave is inversely related to the square of the distance a person is from a wave. Thus: $1.5x^2 = (x+20)^2 $ $0=-.5x^2 +40x +400$ $ x = 88.99 \ m$
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