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Grandfather clock pendulum keeps perfect time: How much time is gained or lost in a year where clock is kept at a higher temperature?

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The pendulum in a grandfather clock is made of brass and keeps perfect time at 18.1oC. How much time is gained or lost in a year if the clock is kept at 24.3oC? Assume the frequency dependence on length for a simple pendulum applies. Enter a positive number for a gain, negative for a loss. Remember it is for a year.

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For brass, the temperature coefficient of expansion is a = ...

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