Question

what is the principle on which thermometer is based on​

Answer 1

Answer:

thermal expansion

Explanation:

These liquid thermometers are based on the principal of thermal expansion. When a substance gets hotter, it expands to a greater volume. Nearly all substances exhibit this behavior of thermal expansion. It is the basis of the design and operation of thermometers.

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Answer 2

Answer:

The principle on which the thermometer is based on the thermal expansion of mercury.