Question

A man has an audible rang from 20HZ to 20KHZ. What are the wavelengths of sound in corresponding to these two frequencies? (Speed sound in air is 344m/s)

Answer 1

aloha!

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we know that,

Velocity = wavelength X frequency

now we are given that the Speed sound in air is 344m/s.

for frequency of 20Hz.

wavelength = velocity / frequency

wavelength = 344 / 20
wavelength = 17.2 m

now,

for frequency of 20Hz --> 20,000Hz

wavelength = velocity / frequency
wavelength = 344 / 20,000
wavelength = 0.00172 m


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hope it helps :)