Question:
a clock with brass pendulum, keeps correct time at 20 degree celcius , but loses 8.212 sec per day when temperature rises to 30 degree celcius. calculate the coefficient of linear expansion of brass
Answer:
Loss of time in a day = 1/2 x α x (t2-t1) x 86400
So, 8.212 = 1/2 x α x 10 x 86400
= 19 x 10-6 per ºC.
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