why is mercury used in making temperature
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Mercury is the only one in liquid state at room temperature. It's 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 also has a high boiling point which makes it very suitable to measure higher temperatures.
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Because it expands rapidly as the temperature increases and also contracts in the same way when the temperature decreases .
It is also shiny and visible .
that's why ...
hope it helps you
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