# Physics

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 747 km and traveled a distance of 3830 km in 5.03 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. Find the wave's (b) frequency and (c) period.

change units to m and second.

speed= distancetraveled/time

frequency=speed/wavelength

period= 1/frequency.

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1. a) 3830km * 1000m/km / ( 5.03h * 3600s/h)
b) 3830km * 1000m/km / (5.03h * 3600s/h) / (747km * 1000m/km)
c) 1 / (3830km* 1000m/km / (5.03h*3600s/h) / (747km * 1000m/km))

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posted by IB

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