Question

Tapping the surface of a pan of water generates 17.5 waves per second. If the wavelength of each wave is 45 cm, what is the speed of the waves?1) 7.9 m/s2) 790 m/s3) 39 m/s4) 2.6 m/s

Answer 1

The frequency of the waves is 17.5 Hz, and their wavelength is 45cm. Recall the following reation between the frequency, the wavelength and the speed of a wave:

`v=\lambda f`

Substitute f=17.5Hz and λ=45cm to find the speed of the wave:

Therefore, the speed of the waves is:

`7.9(m)/(s)`