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A slender steel rod oscillates as a physical pendulum about a horizontal axis through one end....

A slender steel rod oscillates as a physical pendulum about a horizontal axis through one end. If the rod is 8 ft long at 30 degrees celsius, compute the change in its period when the temperature is decreased to 0 degrees celsius.

The answer should be 4.6x10^-4 seconds.
Please show all the work, thanks.

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