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I read a lesson on resonance. It called for cutting mailing tubes to a length in cm of 17200 divided by the frequency of the tuning fork you would use. WHAT IS THE NUMBER 17200 FROM?

It is probably from the speed of sound in air, which is around 330 or 340 meters/second. The wavelength of sound is then (in centimeters) about 34000/frequency, and it looks like they wanted your tube to be 1/2 the sound wavelength.

Arthur Smith

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