Physics Exercises/Vibrations and Sound

Waves, basic The distance between successive crests in the waves in the ocean is 7.5 m. The crests travel 12 m in 4.0 s. What is the frequency of a buoy bobbing up and down in this water? Solution First, we calculate the velocity of water wave: . We are given information about wavelength, so we can solve the problem using the following relationship between velocity, wavelength, and frequency: .