An organ pipe, open at both ends, is 5.20 m long. What is its fundamental frequency? The speed of sound in air is 343 m/s.
A) 16.5 Hz
B) 33.0 Hz
C) 66.0 Hz
D) 99.0 Hz
E) 132 Hz

Question

Quizplus · Accepted Answer

The fundamental frequency of an open organ pipe is given by the formula:
f = nv/2L, where n is the harmonic number, v is the speed of sound, and L is the length of the pipe.
For the fundamental frequency, n = 1.
Substituting the given values, we get:
f = (1 x 343)/(2 x 5.20)
f = 33.0 Hz. 
Therefore, the correct answer is B.

An Organ Pipe, Open at Both Ends, Is 5