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A pendulum clock has a heavy bob supported on a very thin steel rod that is 1.00000 m long at 18.0celcius.

1 - what is the clock's period if the temperature increases by 11.0 celcius? Assume that coefficient of linear expansion of steel is 1.20×10−5K ^-1 .
2 - The clock keeps perfect time at 18.0celcius. At 29.0celcius after how many hours will the clock be off by 3.00 s?

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