Question

why is there a constriction in the clinical capillary​

Answer 1

Answer:

The constriction in the column prevents this and holds the reading. This is why you need to shake the thermometer after taking a reading, to get the mercury held in the column past the constrictionand back into the bulb.

Answer 2

☛ The constriction in the column prevents this and holds the reading. This is why you need to shake the thermometer after taking a reading, to get the mercury held in the column past the constriction and back into the bulb.

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