Tsunamis are fast-moving waves often generated by underwater earthquakes. in the deep ocean their amplitude is barely noticable, but upon reaching shore, they can rise up to the astonishing height of a six-story building. one tsunami, generated off the aleutian islands in alaska, had a wavelength of 716 km and traveled a distance of 3130 km in 6.25 h. a. what was the speed (in m/s) of the wave. for reference, the speed of a 747 jetliner is about 250 m/s. b. find the wave's i. frequency ii. period.