Understanding the Relationship

* Speed (v): The speed of a wave is how fast it travels through a medium.

* Frequency (f): The frequency of a wave is the number of wave cycles that pass a point per second.

* Wavelength (λ): The wavelength is the distance between two corresponding points on consecutive waves (e.g., crest to crest).

These are related by the following equation:

v = fλ

Solving for Wavelength

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

3 km/s = 3000 m/s

2. Rearrange the equation to solve for wavelength (λ):

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.