Mercury Thermometer – InterviewSolution

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1.	Mercury Thermometer
Answer» Themercury-in-glassormercury thermometerwas invented by physicistDaniel Grabreil FahrenheitinAmsterdam(1714). It consists of a bulb containingmercury attached to aglasstube of narrow diameter; the volume of mercury in the tube is much less than the volume in the bulb. The volume of mercury changes slightly with temperature; the small change in volume drives the narrow mercury column a relatively long way up the tube. The space above the mercury may be filled withnitrogengas or it may be at less thanatmospheric pressure a partialvacuum.

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