Physics, asked by valerieaika, 11 months ago

Why is the space above the mercury in a thermometer evacuated? And why should the amount of mercury in a thermometer be small?

Answers

Answered by chakrabortty72

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.

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