1kHz = 1,000Hz\) \(1MHz = 1,000,000Hz\) The speed (or sometimes you might see it called velocity) of a wave (\(v\)) is how far the wave travels in a certain time. Wave speed is measured in metres ...

The velocity of sound varies with temperature and pressure, because these factors affect how the vibrations pass between particles. An observer 400 m away records a 1.2 s time difference between ...