Conceptual Physics (12th Edition)

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

Chapter 10 - Think and Explain: 76

Answer

The "geosynchronous" communication satellites actually are moving very quickly. Their period is 24 hours, just like the rotation of the Earth, and thus they appear to hover above a fixed point on Earth.
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