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Question:
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?



Replies:
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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