An organic pipe closed at one end is 80cm long. Determine the frequency of the...
PHYSICS
JAMB 1990
An organic pipe closed at one end is 80cm long. Determine the frequency of the fundamental note assuming that the speed of sound in air is 340ms-1
- A. 106Hz
- B. 213Hz
- C. 318Hz
- D. 425Hz
Correct Answer: A. 106Hz
Explanation
\(\lambda\) = 4L
= 4 x 80 = 320cm
Converting 320cm to m, we have 3.2m
F = \(\frac{V}{\lambda}\)
= \(\frac{340}{3.2}\)
= 106.25Hz
\(\approxeq\) 106Hz
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