Question
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
Options :
1/86400 per °C
1/43200 per °C
1/14400 per °C
1/28800 per °C
Answer :
1/86400 per °C
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