Conceptual Physics (12th Edition)

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

Chapter 15 - Think and Explain - Page 299-300: 48



Work Step by Step

At a given moment, different molecules can have very different instantaneous speeds. The average speed of the molecules is known, and depends on the temperature. Compare this to the situation of cars on a highway: they move at some average speed, but at differing individual speeds.
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