Q.

[[1]] thermometer has a kink in its stem.


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Detailed Solution

The clinical thermometer has a kink in its stem.
A kink in the clinical thermometer helps to inhibit the falling of mercury present in the capillary tube into the bulb, ensuring that a person should get the correct reading. The main purpose of providing the kink is that mercury melts at room temperature and falls rapidly when taken out from the mouth of the patient before the reading is taken. Kinks prevent the rapid falling of the mercury in the bulb.
 
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