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When a cold alcohol thermometer is placed in a hot liquid, the column of alcohol goes down slightly before going up. Explain why.​

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Ujalakhan18idn

Answer:

See below

Explanation:

When a cold alcohol thermometer is placed in a hot liquid, the following takes place.

  1. The glass of thermometer expands because of the heat so the column of alcohol goes down.
  2. After some time, the heat travels to alcohol and then alcohol expands.

So, Reason why alcohol goes down first:

Alcohol first goes slightly down because of the expansion of the glass of thermometer before doing up.

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