Question

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Answer 1

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Q1)

answer(A) - Pyrex glass in commonly used in kitchenware because pyrex glass has a very low coefficient of expansion. There it does not crack on heating.

answer(B)-The pendulum clock is made up of invar because invar's coefficient of thermal expansion is small. So, the length of the pendulum remains unaffected during changes in temperature.

(Q2),(Q3)-(I'm orry I don't no that properly so i am not giving the answer.) Because I did not learn them .

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