Name: Different Units of Temperature
Uploaded: 2019-07-19
Duration: 5 min 52 s
Description: The concept introduces the various units that are used for measuring temperature. The properties of each unit along with their interconversions are also disc...

Question

We are advised not to use the laboratory thermometer to measure our body temperature. Why?

Accepted Answer

Laboratory thermometers are used in laboratories to measure temperatures with high accuracy and over a large range of temperatures, generally in the range of $- 10 ° C$ to $110 ° C$ . 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 (due to cooling of its bulb by air). This will give a wrong value of the body temperature. A clinical thermometer is used to measure the human body temperature. A clinical thermometer has a kink in its glass tube just above the bulb containing mercury which helps to prevent the backflow of mercury into the thermometer bulb when the thermometer bulb is removed from the mouth of a patient. In this way, we can obtain the correct body temperature of the patient.

Andhra Pradesh Board Solutions for Exercise 4: EXERCISE

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