Tsunamis are fast-moving waves generated by underwater earthquakes.In the deep o

Question

Tsunamis are fast-moving waves generated by underwater earthquakes.In the deep ocean their amplitude is barely noticeable, but uponreaching shore, they can rise up to the astonishing height of asix-story building. One tsunami, generated off the Aleutian islandsin Alaska, had a wavelength of 650 km andtraveled a distance of 3700 km in 5.2 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.
1 m/s

(b) Find the wave's frequency.
2 Hz

(c) Find the wave's period.
3 s (a) What was the speed (in m/s) of the wave?For reference, the speed of a 747 jetliner is about 250 m/s.
1 m/s

(b) Find the wave's frequency.
2 Hz

(c) Find the wave's period.
3 s

Explanation / Answer

(a) What was the speed (in m/s) of the wave?For reference, the speed of a 747 jetliner is about 250 m/s.
1 m/s
3700000/5.2*3600=197.64m/sec


(b) Find the wave's frequency.
2 Hz
frequency=speed/wavelength=197.64/650000=0.3040*10-3Hz

(c) Find the wave's period.
3 s
Time period=T=1/frequency=3288.80sec

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