Question

Why do the mercury thermometer is replaced by the digital thermometers now a days of class 7 science. ​

Answer 1

Explanation:

This is so because when the temperature is measured, the mercury comes down quickly and we are not able to measure the temperature. In digital thermometers the final temperature remains the same until we press the button.

Answer 2

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There is a lot of concern over the use of mercury in thermometers. Mercury is a toxic substance and is very difficult to dispose of if a thermometer

breaks. These days digital thermometers are available which do not use mercury.

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