Question

What is the wavelength in water of a compressional wave whose frequency is 400 per second if the speed of wave in water is 1,450 m/s?

Answer 1

velocity of wave = frequency $\times$ wavelength

$\nu=\digamma\lambda$

1450 m/s = $400 Hz \times \lambda$

wavelenght $\lambda=$ $\frac{1450}{400} = 3.625 m$