Question

A pendulum clock having copper rod keeos correct time at `20^0 C`. It gains 15 seconds per day if cooled to `0^@C`. Calculate the coefficient of linear expansion of copper.

Answer 1

`(15)/(24 xx 60 xx 60) = (1)/(2) alpha xx 20`
`rArr alpha = (1)/(16 xx 3600) = 1.7 xx 10^(-5)//.^(@)C`