Question

A traveling wave has wavelength 0.50 m, speed 20 m/s. Find the wave frequency.

Answer 1

$f=\frac{v}{\lambda}$ where $f$ is frequency, $v$ is speed and $\lambda$ is wavelength. So f=20/0.5=40. The unit is 1/s or Hz.

Answer 2

Frequency = (speed) / (wavelength) = 20 / 0.5 = 40 per second = 40 Hz.