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A circular dise made of iron is rotated ...

A circular dise made of iron is rotated about its sxis at a constant vwlocity Omega. Calculate the percentage change in thelinear speed of a particle of the tim as the disc is slowly heated from `20^C to 50^C` keeping the angular velocity constand. Coefficient of linear expansion of iron `=1.2 xx 10^(-5) `0^C (-1)`.

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