Conceptual Physics (12th Edition)

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

Chapter 18 - Think and Discuss - Page 353: 90


The second law is a fundamental law because it applies to everything in nature, decreeing that everything tends toward disorder. It is not an "exact" law because it is "only" a statement of probability. For example, there is a nonzero chance that 100 pennies rolling off a table will all land on edge, arranged in a uniform 10x10 grid. The second law does not forbid this from happening, but merely states that it is highly improbable.
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