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A 324g ball is tied to a string. It is pulled to an angle of 6.80degrees and released to swing as a pendulum. A student with a stopwatch finds that...

A 324g ball is tied to a string. It is pulled to an angle of 6.80degrees and released to swing as a pendulum. A student with a stopwatch finds that 17 oscillations take 12.0s. How long is the string (in cm)?

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