## Essential University Physics: Volume 1 (3rd Edition)

Published by Pearson

# Chapter 16 - Exercises and Problems - Page 302: 85

a

#### Work Step by Step

The $R$ factor is directly related to the thickness of the insulation. Since the thickness doubled, we can conclude that the $R$ factor must double as well. Thus, $\fbox{a}$ is the correct answer.

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