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It is Said that Mercury is Used in Defining the Temperature Scale Because It Expands Uniformly with Temperature. - Physics

Answer in Brief

It is said that mercury is used in defining the temperature scale because it expands uniformly with  temperature. If the temperature scale is not yet defined, is it logical to say that a substance expands uniformly with temperature?

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It is not illogical to say that mercury expands uniformly before temperature scale was defined. It's uniform expansion can be studied by comparing the expansion of mercury with expansion of other substances (like alcohol water etc).

Concept: Temperature and Heat
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HC Verma Class 11, Class 12 Concepts of Physics Vol. 2
Chapter 1 Heat and Temperature
Short Answers | Q 3 | Page 11
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