Question

precautions of laboratory thermometer and clinical thermometer​

Answer 1

✒The precautions needed while reading a laboratory thermometer are:

➡It should be kept upright not tilted.

➡Bulb should be surrounded from all sides by the substance of which the temperature is to be measured.

➡The bulb should not touch the surface of the container.

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Answer 2

Answer:

Answer:

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Similarities:

(i) Both clinical and laboratory thermometers have long, narrow, uniform glass tubes.

(ii) The bulbs of both the thermometers have mercury in them.

Differences:

(i) The temperature range of clinical thermometers is from 35°C to 42°C while that of laboratory thermometer is from −10°C to 110°C.

(ii) Clinical thermometer is used to measure the temperature of a human body. However, laboratory thermometer cannot be used to measure the temperature of a human body.

(iii) The least count of both the thermometers differs.

(iv) Unlike clinical thermometer that can be tilted, laboratory thermometer is kept upright while reading the temperature values.