A tsunami is a very long-wavelength wave produced by a sudden movement in the sea floor over a distance of hundreds of kilometers. The wavelengths in a tsunami are generally much greater than ocean depth so that a tsunami can be described accurately in the shallow wave approximation, and is non-dispersive. Consider a tsunami described by a wave with approximate wavelength 100 km and amplitude 1 m. Compute the velocity and period of this wave and the power density per unit length of shoreline perpendicular to the incident wave. you may approximate ocean depth as h ∼ 3.5 km. Also you will need the power density in the shallow wave approximation.