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A student observes a resonance in an air column open at one end by changing freq

ID: 1275045 • Letter: A

Question

A student observes a resonance in an air column open at one end by changing frequency of a sound. The length of air column is 20 cm and the speed of sound is 344 meters per second. Find the two lowest frequencies of sound which produce resonance in these conditions.

A student observes a resonance in an air column open at one end by changing frequency of a sound. The length of air column is 20 cm and the speed of sound is 344 meters per second. Find the two lowest frequencies of sound which produce resonance in these conditions.



Explanation / Answer

The relationship, which works only for the first harmonic of an open-end air column, is used to calculate the wavelength for this standing wave.

Wavelength = 2