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The effictive length of a simple pendulu...

The effictive length of a simple pendulum is the sum of the following three : length of string , radius of bob , and length of hook.
In a simple pendulum experiment , the length of the string , as measured by a meter scale , is `92.0 cm`. The radius of the bob combined with the length of the hook , as measured by a vernier callipers , is `2.15 cm`. The effictive length of the pendulum is

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