Question

Why can't we measure our body temperature with a laboratory thermometer ️ State any two reasons

Answer 1

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. This will give a wrong value of the body temperature.

Answer 2

Answer

$\bigstar$ Laboratory thermometer :-

• The laboratory thermometer is a thermometer that is used to measure the temperature of the objects in our daily usage.
• This is a bit bigger than the clinical thermometer. It doesn't have a kink or a bend in it.

We cannot measure our body temperature because of the following reasons :-

• A kink or bend, which would have prevented the mercury from falling on it's own, is absent in the laboratory thermometer. Thus, the mercury falls on it's own as soon as it is removed from the body. As a result, we cannot get an accurate measurements.
• The laboratory thermometer has a high temperature range i.e, from -10°C to 110°C, whereas humans normal body temperature is 37°C. To measure the body temperature accurately, a narrow range is preferred.