Question

a sound wave travels at a speed of 340 m /s. if its wavelength is 1.5 cm what is the frequency of the wave? will it be audible?

Answer 1

It is given that,

Velocity (v) of sound = 339 m/s

Wavelength (λ) = 1.5 cm = 0.015 m

Frequency (ν) =?

We know that, speed = wavelength X frequency

⇒340 m/s = 0.015 m X frequency

⇒ Frequency = 340 m/s / 0.015 m = 22666.66 Hz

⇒ Frequency = 22666.66 Hz.

Hence the freq. is beyond 20000 Hz so it is not audible..

Answer 2

velocity of sound = 339 m/s
wavelength = 1.5 cm = 0.015 m

frequency =?

We know that

speed = wavelength * frequency

340 m/s = 0.015 m * frequency

frequency = 340 m/s / 0.015 m = 22666.66 Hz

frequency = 22666.66 Hz.

since the frequency is more 2kHz 

so it is inaudible..

i hope it helps....