Q.1 State similarities and differences between the laboratory thermometer and the clinical thermometer.


Answer :

Similarities:

1. Long narrow glass tubes.
2. Both have a bulb at one end.
3. Contain mercury in the bulb.
4. Use the Celsius scale on the glass tube.
5. Both thermometers are used to measure temperature.

Differences:

1. A clinical thermometer reads temperature 35°C to 45°C while the range of laboratory thermometer is -10°C to 110°C.

2. The clinical thermometer has a kink near the bulb while there is no kink in the laboratory thermometer.

3. A clinical thermometer is used to measure human body temperature whereas a laboratory thermometer is used to measure the temperature of another object which has a higher temperature than human body temperature.

4. The least count of both the thermometers is different.

5. The clinical thermometer is can be tilted while reading the temperature values whereas the laboratory thermometers need to be kept upright.

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