Conceptual Physics (12th Edition)

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

Chapter 35 - Reading Check Questions (Comprehension): 10

Answer

If you and your friend are at rest relative to each other, you'll share the same realm of spacetime. If there is relative motion between the two of you, you won't.

Work Step by Step

This is discussed on page 664.
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