A light pointer fixed to one prong of a tuning fork touches a vertical plate. The fork is set vi...

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A light pointer fixed to one prong of a tuning fork touches a vertical plate. The fork is set vibrating and plate is allowed to fall freely. 8 complete oscillations are counted when the plate falls through \( 10 \mathrm{~cm} \).
\( P \) What is the frequency of the tuning fork?

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