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

Question

Tsunamis are fast-moving waves often generated by underwaterearthquakes. In the deep ocean their amplitude is barely noticable,but upon reaching shore, they can rise up to the astonishing heightof a six-story building. One tsunami, generated off the Aleutianislands in Alaska, had a wavelength of 646 km and traveled adistance of 3400 km in 5.13 h. (a) What was the speed (in m/s) ofthe wave? For reference, the speed of a 747 jetliner is about 250m/s. Find the wave's (b) frequency and (c) period.
I know A is=3400000 1h       5.13   3600 =184.10 m/s But I have been solving b and cthe follwing way and comming up with the wrong answer?
  B=250
         646 *10^3= 3.86 *10^ - 4 h/z
   C= 1
  3.86* 10^- 4h/z = 2.56 *10^ 3s

I know A is=3400000 1h       5.13   3600 =184.10 m/s But I have been solving b and cthe follwing way and comming up with the wrong answer?
  B=250
         646 *10^3= 3.86 *10^ - 4 h/z
   C= 1
  3.86* 10^- 4h/z = 2.56 *10^ 3s

Explanation / Answer

Here velocity = 3400 km / 5.13 h = 662.77 km/hr = 184.10m/s Wavelength = 646 km So frequency = velocity / wavelength = 184.10 /(646*103) = 2.85*10-4 Hz Also period = 1/F = 3508.9 sec

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