Unit - 5.2 Temperature And Its Measurement — PHYSICS STD 7 — Question
ICSE BoardEnglish MediumSTD 7PHYSICSUnit - 5.2 Temperature And Its Measurement3 Marks
Question
Why is mercury used as thermometric liquid? Give three reasons.
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Answer
Mercury is used as a thermometric liquid because of the following reasons: 1. The heat required for the expansion of mercury is very little, thus the temperature of a body can be easily recorded without changing its temperature. 2.Mercury is having a high boiling point of $357^{\circ} C$, so it can be used to record temperatures as high as $357^{\circ} C$. 3.The freezing point of mercury is $-39^{\circ} C$, so it can record temperatures as low as $-39^{\circ} C$.
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