Conceptual Physics (12th Edition)

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

Chapter 10 - Think and Discuss - Page 205: 91

Answer

Geosynchronous satellites have a period of 24 hours and follow a circular path whose center is the Earth's center. Singapore is located just one degree north of the equator, and also very closely follows a circular path whose center is the Earth's center. A satellite can "hover" almost directly above Singapore, but San Francisco is too far from the equator for the same to hold true for it.
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