1.

A clock with a metal pendulum beating seconds keeps correct time at 0∘C. If it loses 12.5 seconds a day at 25∘C, the coefficient of linear expansion of metal of pendulum is

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A clock with a metal pendulum beating seconds keeps correct time at 0C. If it loses 12.5 seconds a day at 25C, the coefficient of linear expansion of metal of pendulum is



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