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STD 11- 8. mechanical properties of solids — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11- 8. mechanical properties of solids4 Marks
Question
To keep constant time, watches are fitted with balance wheel made of
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Answer

(a)Because dimension of invar does not varies with temperature.

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