Head Scratcher Resonance

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Head Scratcher Resonance

PIRA: 3A60.30

There are two sets of prongs on a head scratcher at different lengths. When one of the long ones are plucked the head scratcher will resonate with the frequency of the long prongs, but the short ones will not vibrate. The opposite is true if one of the short prongs is plucked. This is similar to the tennis ball resonance demo.