Conceptual Physics (12th Edition)

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

Chapter 23 - Think and Explain: 73

Answer

See below.

Work Step by Step

A metal in which electrons suffer many collisions and have a short mean free path offers more electrical resistance to electron flow. For a given metal, cooling it "freezes out" the molecular vibrations and allows the electrons to pass more easily, raising the mean free path lowering the electrical resistance.
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