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Question

Why is Mercury Used in Thermometers?


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Solution

Step 1: Mercury Thermometers

  1. A mercury thermometer consists of a glass tube filled with mercury and labelled with a standard temperature scale.
  2. Temperature fluctuations cause the mercury to expand and shrink.
  3. Mercury thermometers are employed in scientific investigations, as well as in homes and businesses.

Step 2: Mercury used in thermometers

  1. Mercury is in liquid state at room temperature.
  2. It is used in thermometers because it has a high coefficient of expansion, making it easier to move around in it when the temperature changes.
  3. Mercury has a high boiling point, it may be used to detect greater temperatures as well.

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