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A clock pendulum made of invar has a per...

A clock pendulum made of invar has a period of `2` s at `20^(@)C`. If the clock is used in a climate where average temperature is `40^(@)C`, what correction (in seconds ) may be necessary at the end of `10` days to the time given by clock? `(alpha_("invar") = 7 xx 10^(-7) "^(@)C, 1` "day" =`8.64xx10^(4)s`)

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