Question

Why should a laboratory thermometer be used while it is in contact with the material whose temperature is being measured ? ​

Answer 1

Answer:

A laboratory thermometer cannot beused to measure the human bodytemperature. This is because as soon as we take out the bulb of thelaboratory thermometer from our mouth, the level of mercury in its tubewill start falling quickly.

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Answer 2

Answer:

A laboratory thermometer cannot be used to measure the human body temperature. This is because as soon as we take out the bulb of the laboratory thermometer from our mouth, the level of mercury in its tube will start falling quickly