When observing the waves rise and fall on the surface of the water moves up and down, around 600 in 1 minute and the distance between the next wave of San 20 cm. you shall find that when one observed the wave moves in 1 minute will be a distance of a few meters.
When the wave motion on the surface, heaving 600 rounds in one minute distance between the ridge and the next wave that measured 20 cm, find the one that when the wave moves in one minute to a distance of a few meters.
When the observed wave moving on the surface the rise and fall of 600 around in 1 minutes. And the distance between the crest of a wave at the next each measure 20 cm. And find out when to observe a wave moving in 1 minutes to distances many meters.