Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (3rd Edition)

Published by Pearson
ISBN 10: 0321740904
ISBN 13: 978-0-32174-090-8

Chapter 20 - Traveling Waves - Exercises and Problems: 34

Answer

(a) $I = 4.0\times 10^{-8}~W/m^2$ (b) $I = 2.0\times 10^{-2}~W/m^2$

Work Step by Step

(a) We can find the intensity of the sound wave as: $I = I_0~10^{\beta/10}$ $I = (10^{-12}~W/m^2)~10^{46/10}$ $I = 4.0\times 10^{-8}~W/m^2$ (b) We can find the intensity of the sound wave as: $I = I_0~10^{\beta/10}$ $I = (10^{-12}~W/m^2)~10^{103/10}$ $I = 2.0\times 10^{-2}~W/m^2$
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