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CBSE Class 7 Answered

<div>how does a knink in a thermometer help.</div>
Asked by soumyabrata chatterjee | 04 May, 2016, 09:16: PM
Expert Answer
The kink helps in taking correct readings because the easily passes up through this kink when the temperature rises but it does not lower down when the temperature falls. It needs a jerk to fall back in the bulb. 
Answered by Yashvanti Jain | 05 May, 2016, 10:15: AM
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