Essential University Physics: Volume 1 (3rd Edition)

Published by Pearson
ISBN 10: 0321993721
ISBN 13: 978-0-32199-372-4

Chapter 17 - For Thought and Discussion - Page 313: 15



Work Step by Step

Mercury thermometers are in glass and depend on the rate at which Mercury expands to determine temperature. This works, for glass maintains a constant volume, meaning that how much the mercury expands corresponds to a specific temperature. However, if the two had the same coefficient of volume expansion, the glass would expand, meaning that the volume of the glass would change and thus meaning that the thermometer would not work.
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