Question

b. What would be the velocity of a wave with frequency of 20 Hz and wavelength of 20 m? Mention if the frequency of the sound will be audible here?​

Answer 1

Step-by-step explanation:

Given :

Frequency of wave 20 Hz

Wavelength = 20 m

To find:

Velocity of the wave

Concept:

Velocity is given be the product of the frequency and wavelength of the wave.

V = 1 *

where is the wavelength and u is the

frequency

Any wave is audible if it ranges between 20 Hz and 20,000 Hz.

Calculation:

Velocity = 1 x u

=> V = 20 x 20

=> V = 400 m/s

Sound will be audible since it falls in the range of 20 Hz and 20000 Hz.