Conceptual Physics (12th Edition)

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

Chapter 20 - Think and Explain: 70

Answer

Marchers at the tail end of a long parade who are following a band may be out of step with marchers at the front because of the extra delay time for the band's music to reach them through the air
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