Name: Measurement of Mass
Uploaded: 2019-07-19
Duration: 3 min 24 s
Description: Mass is a measure of the amount of matter in a substance or an object. The basic SI unit for mass is the kilogram (kg). Let's learn about it in detail.

Question

What is a clinical thermometer ? State its special features. Draw a labelled neat diagram of a clinical thermometer showing the range of temperature marked on it.

Accepted Answer

Doctors use a special thermometer called the clinical thermometer for measuring the temperature of the patient's body. A clinical thermometer has the markings from $35 ° C to 42 ° C$ . It has a slight bend or kink in the stem just above the bulb. This kink is called constriction. This constriction prevents the mercury from falling back all by itself. The temperature of a healthy person is $37 ° C$ . This temperature is marked by a red arrow.

Before use, the bulb of thermometer is washed by keeping it in a beaker containing cold water. Then it is slightly jerked to bring the level of mercury in its capillary tube below the mark $37 ° C$ .

Then to measure the temperature of a patient's body, its bulb is kept either below the tongue or under the arm's pit of the patient for about a minute after which the thermometer is taken out and its reading is noted. If the temperature of patient's body is above $37 ° C$ , he is said to be suffering from fever.

What is a clinical thermometer ? State its special features. Draw a labelled neat diagram of a clinical thermometer showing the range of temperature marked on it.

Important Questions on Physical Quantities and Measurement

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