The velocity (v) of a wave is given by the equation:
v = λf
where: v = velocity of the wave λ = wavelength of the wave f = frequency of the wave
Rearranging the equation, we have:
f = v / λ
Substituting the given values:
f = 32 m/s / 4 m
f = 8 Hz
Therefore, the frequency of the wave is 8 Hz.