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 - Conceptual Questions: 12

Answer

The correct answer is D.

Work Step by Step

The correct answer is D. For the first 2 seconds, the frequency we hear is lower than the emitted frequency. Therefore, the source must be moving away from us. After t = 2 s, the frequency we hear is higher than the emitted frequency. Therefore, the source must be moving toward us.
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