physics???????

Question

If the velocity of a 580-Hz sound is 1045 ft/s in the air and 5470 ft/s in seawater, find the wavelength of this sound in (a) air and____ft
(b) seawater.___ft

Answer 1

We have to know that the frequency of the sound doesn't change and the equation v = f x lambda, so:
v1 = f x lambda1, lambda1 = v1 / f = 1045 ft/s / 580 /s = 1.8 ft and
lambda2 = v2 / f = 5470 ft/s / 580 /s = 9.43 ft