Understanding the Relationship

The relationship between wavelength (λ), frequency (f), and wave speed (v) is:

* v = fλ

Solving for Wavelength

1. Convert speed to meters per second (m/s):

* 3 km/s = 3000 m/s

2. Rearrange the formula to solve for wavelength:

* λ = v / f

3. Plug in the values:

* λ = 3000 m/s / 12 Hz

4. Calculate the wavelength:

* λ = 250 meters

Therefore, the wavelength of the wave is 250 meters.