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: 64


The answer is below.

Work Step by Step

a) Since the intensity is inversely related to the square of the distance, it follows that if the distance is doubled, the intensity is 1/4 as much. b) We use the equation for the decibel level: $ \beta = 10log{(1/4)}\\ \beta = -6 $ Thus, the decibel level is decreased by 6 decibels.
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