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Measurement and Effects of Heat — Science STD 8 — Question

Maharashtra BoardEnglish MediumSTD 8ScienceMeasurement and Effects of Heat3 Marks
Question
A clinical thermometer has to be jerked before re-use.
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Answer

The constriction above the bulb of the clinical thermometer prevents the mercury thread once risen from falling down to the bulb. Hence, in order to force the mercury thread back into the bulb, the 1 clinical thermometer has to be jerked before re-use.

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