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Many techniques have been developed for the measurement of pressure and vacuum. Instruments used to measure pressure are called pressure gauges or vacuum gauges.

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How does the gas thermometer work?

A gas thermometer works by measuring temperature based on the relationship between the pressure and volume of a gas. As the gas is heated or cooled, its pressure and volume change accordingly. By measuring these changes, the temperature can be determined using the ideal gas law (PV=nRT).


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