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[code]
V = f [multiply] [lambda]
[/code]
V = wave speed
f = frequency
[lambda] = wavelength
[h3]Examples[/h3]
[b]1) If a wave has a frequency of 20[i]Hz[/i] and a wavelength of 10 [i]metres[/i], find the wave speed[/b]
V = f [multiply] [lambda]
V = 20 [multiply] 10
[u]V = 200[i]m/s[/i][/u]
[b]2) If a wave has a wave speed of 40[i]m/s[/i] and has a frequency of 80[i]Hz[/i], find the wavelength[/b]
[lambda] = V [divide] f
[lambda] = 40 [divide] 80
[u][lambda] = 0.5 [i]metres[/i][/u]
[b]3) If a wave has a wavelength of 10[i]m[/i] and has a wave speed of 50[i]m/s[/i][/b]
f = V [divide] [lambda]
f = 50 [divide] 10
[u]f = 5[i]Hz[/i][/u]
[img src='https://res.cloudinary.com/deylrqt2d/image/upload/v1487892670/timeperiod_gif.gif']