Question

A sound wave has a frequency of 2700Hz and wavelength of 20cm. What is it’s velocity?

Answer 1

The velocity of the sound wave is 540 meters per second.

Step-by-step explanation:

The sound is a consequence of mechanic waves, the velocity of a mechanic wave (
`v`), in meters per second, is determined by following formula:

`v = \lambda\cdot f` (1)

Where:

`\lambda` - Wavelength, in meters.

`\lambda` - Frequency, in hertz.

If we know that
`f = 2700\,hz` and
`\lambda = 0.20\,m`, then the velocity of the sound wave is:

`v = \lambda\cdot f`

`v = 540\,(m)/(s)`

The velocity of the sound wave is 540 meters per second.