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## Homework Statement

A 319g ball is tied to a string. It is pulled to an angle of 7.60 degrees and released to swing as a pendulum. A student with a stopwatch finds that 14 oscillations take 13.0s.

What is the length of the string?

## Homework Equations

I have already tried using T = 2pi sqrtL/g, but that does not give me the right answer.