The kink in the capillary tube of the thermometer allows mercury to rise but does not allow it to fall.
The length of wire PQ in case of A is equal to the diameter of the semicircle formed by the wire CDE, in case B. One pin is attached to each wire with the help of wax as shown in figure above. Which pin will fall first? Explain.
Question
Why does mercury not fall or rise in a clinical thermometer when taken out of the mouth?
- Heat CBSE Class 7
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