If mercury is a poor conductor of heat, then why is it used in thermometers?
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- Mercury is used in thermometers because it has high coefficient of expansion. Hence, the slightest change in temperature is notable when it's used in a thermometer.
- It can measure a wide range of temperatures from -40 to 356 ° C, and up to 570 ° C under pressure, in a liquid state.
- It also has a high boiling point which makes it very suitable to measure higher temperatures.
- Also, it has a shiny appearance and doesn't stick to the glass surface of the glass.
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