Physics, asked by nanilama948, 3 days ago

Why is there vacuum above the mercury in the capillary tube of a laboratory thermometer?

Answers

Answered by oODivineGirlOo

Answer:

The top of the barometer is filled with nothing (vacuum) because the mercury must have the space to expand and contract without any other force affecting it; a gas or liquid in the top would have its own pressure against the mercury and give inaccurate readings.

Answered by yadavaditya4813

Answer:

The top of the barometer is filled with nothing (vacuum) because the mercury must have the space to expand and contract without any other force affecting it; a gas or liquid in the top would have its own pressure against the mercury and give inaccurate readings.

Explanation:

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