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Watch This Tuning Fork Video:
Tuning fork vibrations in super slow motion
A tuning fork of frequency 440 Hz is held above an air column that is gradually increased in length. What is t?
A tuning fork of frequency 440 Hz is held above an air column that is gradually increased in length. What is the length of the air column that will produce the second resonance position when the speed of sound is 336 m/s? (Assume closed-air column resonance.)
Given f=440Hz, v=336m/s
For a closed air column, frequency is:
f = nv/4L, where n=1,3,5...
So length of column at 2nd resonance is:
L = nv/4f
L = (3)(336)/4(440)
L = 57.3 cm
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