A 0.640-m long gas column is open at both ends. What is the fundamental resonant frequency of the air column if the speed of sound in the air is 340 m/s?
A)432 Hz
B)266 Hz
C)198 Hz
D)132 Hz
E)669 Hz

Question

Quizplus · Accepted Answer

The fundamental frequency for an open-open tube is given by f = v / (2L), where v is the speed of sound and L is the length of the tube. Substituting the given values, f = 340 / (2 * 0.640) = 266 Hz.

A 0640-M Long Gas Column Is Open at Both Ends