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: 43

Answer

$93.25\ Hz$

Work Step by Step

We know that the speed of sound is 343 meters per second. Considering the speed of the car (in meters per second), we find that the frequency of the sound is effectively: $f = 85 \times (1+\frac{33.3}{343})= 93.25\ Hz$
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