Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 20 - Think and Explain - Page 389-390: 55



Work Step by Step

When a sound wave goes by a particular point in the air, the air is alternately compressed and then rarefied. The density increases and then decreases as the compressions and rarefactions occur. This is discussed on page 377, and shown in Figure 20.2.
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