What is the wavelength of a 2.2 mhz ultrasound wave traveling through aluminum? assume that the speed of sound in aluminum is 5100 m/s?

The frequency of a wave is equal to the linear speed divided the wavelength. so in equation form.

f = v / l

so the wavlength

l = v / f

where f is the frequency

v iss the linear speed

l is the wavelength

l = (5100 m/s) / (2.2 Mhz) (10^6 hz / 1 Mhz)

f = 0.0023 m

f = 2.3 mm