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If the fundamental frequency of a closed pipe organ on a day when the speed...

Physics
JAMB 1985
If the fundamental frequency of a closed pipe organ on a day when the speed of sound is 340ms-1 is 170Hz, then the length of the pipe is
  • A. 50cm
  • B. 70cm
  • C. 100cm
  • D. 150cm
  • E. 200cm
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Correct Answer: Option A
Explanation
\(\lambda\) = \(\frac{v}{f}\)

= \(\frac{340}{170}\)

= 2m ; for closed pipe

L = \(\frac{1}{4}\)\(\lambda\)

= \(\frac{1}{4}\) x \(\frac{2}{1}\)

= 0.5m

= 50cm
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