Question

How does a thermometer work?​

Answer 1

Answer:

A thermometer has a glass tube sealed at both ends and is partly filled with a liquid like mercury or alcohol. As the temperature around the thermometer's bulb heats up, the liquid rises in the glass tube.

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Answer 2

Answer:

Explanation:

A thermometer measures temperature through a glass tube sealed with mercury that expands or contracts as the temperature rises or falls.As temperatures rise, the mercury-filled bulb expands into the capillary tube. Its rate of expansion is calibrated on the glass scale.