Two points A and B on the surface of the Earth are at the same longitude and 60.0° apart in latitude. Suppose that an earthquake at point A creates a P wave that reaches point B by traveling straight through the body of the Earth at a constant speed of 7.80 km/s. The earthquake also radiates a Rayleigh wave, which travels along the surface of the Earth in an analogous way to a

surface wave on water, at 4.50 km/s. (a) Which of these two seismic waves arrives at B first? (b)What is the time difference between the arrivals of the two waves at B? Take the radius of the Earth to be 6370 km.

surface wave on water, at 4.50 km/s. (a) Which of these two seismic waves arrives at B first? (b)What is the time difference between the arrivals of the two waves at B? Take the radius of the Earth to be 6370 km.

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