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

Question

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 867 km and traveled a distance of 3160 km in 5.35 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.

So I found the speed to be 164.07 m/s and the frequency to be .00018 Hz but when finding the period I get 1/Hz which gives me 5555.55. According to my homework this is wrong! Can anyone help me out please! Thanks

Explanation / Answer

speed v = 3160/ 5.35 = 590.65 km/hr = 164.07 m/s

wave frequency f = speed / wavelenght = 164.07 / 867000 = 1.89x 10^-4 Hz

period = 1/f = 5284.3 sec = 1.4678 hours

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