Conceptual Physics (12th Edition)

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

Chapter 11 - Think and Discuss - Page 225: 70

Answer

No need to worry.

Work Step by Step

When a particle of matter meets a particle of antimatter, equal masses of each annihilate, with most of it turning into radiant energy. The whole Earth could not be annihilated by antimatter unless an Earth-sized chunk of antimatter ran into it. This is discussed on page 221.
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