Conceptual Physics (12th Edition)

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

Chapter 12 - Think and Do - Page 241: 27

Answer

This is a hands-on demonstration. Try it and see! When you pack coins so that each touches 6 neighbors, note this "hexagonal close pack" pattern fits the coins into a smaller overall area.
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