Pendulum Project

What Affects the Period of A Pendulum?

Is it the Mass?

Is it the Amplitude? Is it the Length?
Mass Measured in Pennies Amplitude Measured in cm Length Measured in Centimeters
Getting the solution is easy, but proving it and writing a good procedure is a little tougher!
   
Not the Mass! Not the Amplitude! It is the Length
The shorter the length, the faster the period of the pendulum!
My old, pendulum, grandfather clock is running a bit fast.  What can I do to slow it down?

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