What is the lowest frequency that will resonate in an organ pipe 5.00 m in length,closed at one end? The speed of sound in air is 340 m/s.
A)17.0 Hz
B)34.0 Hz
C)68.0 Hz
D)1 700 Hz
E)3 400 Hz

Question

Quizplus · Accepted Answer

The fundamental frequency (first harmonic) for a pipe closed at one end is given by $f = \frac{v}{4L}$, where $v$ is the speed of sound in air (340 m/s) and $L$ is the length of the pipe (5.00 m). Substituting these values gives $f = \frac{340}{4 \times 5} = \frac{340}{20} = 17.0$ Hz.

What Is the Lowest Frequency That Will Resonate in an Organ