okay for a) I got the answer as 11.67 seconds and did v=d/t and for b) i found that wavelength= 6km. Im confused how the 100 m deep affects the equation for c and d.
The 2011 Japan tsunami was triggered by an earthquake 70 km offshore. The earthquake travels through the earth as a sound wave; the speed of sound in rock is 6 km/s. (a) How long after he earthquake happened was the earthquake felt in Japan? (b) The frequency of this sound wave is about 1 Hz, what was the wavelength? (c) The wavelength of the tsunami is hundreds of miles; the ocean is about 100m deep in that region. What was the tsunami wave speed? (d) How long did it take the tsunami to reach Japan?
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