The reason why mercury does not fall or rise in a clinical thermometer when taken out of the mouth is due to its construction.

1. A clinical thermometer has a small constriction or narrow passage just above the bulb that holds the mercury.

2. When the temperature rises, the mercury expands and moves up the tube past this constriction.

3. When the temperature falls, the constriction prevents the mercury from falling back down immediately. This allows the temperature to be read accurately after the thermometer is removed from the patient's mouth.

4. The mercury will only fall back down when shaken hard. This is done to reset the thermometer for the next reading.

This design allows for an accurate reading of a person's body temperature, even after the thermometer is removed from the body.

Question

The reason why mercury does not fall or rise in a clinical thermometer when taken out of the mouth is due to its construction.

1. A clinical thermometer has a small constriction or narrow passage just above the bulb that holds the mercury.

2. When the temperature rises, the mercury expands and moves up the tube past this constriction.

3. When the temperature falls, the constriction prevents the mercury from falling back down immediately. This allows the temperature to be read accurately after the thermometer is removed from the patient's mouth.

4. The mercury will only fall back down when shaken hard. This is done to reset the thermometer for the next reading.

This design allows for an accurate reading of a person's body temperature, even after the thermometer is removed from the body.

Knowee AI · Accepted Answer

The reason why mercury does not fall or rise in a clinical thermometer when taken out of the mouth is due to its construction.

1. A clinical thermometer has a small constriction or narrow passage just above the bulb that holds the mercury.

2. When the temperature rises, the mercury expands and moves up the tube past this constriction.

3. When the temperature falls, the constriction prevents the mercury from falling back down immediately. This allows the temperature to be read accurately after the thermometer is removed from the patient's mouth.

4. The mercury will only fall back down when shaken hard. This is done to reset the thermometer for the next reading.

This design allows for an accurate reading of a person's body temperature, even after the thermometer is removed from the body.

The mercury does not fall or rise in a clinical thermometer when taken out of the mouth. Explain why.

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