In the figure below, the earthquake occurred 6,560 km from the seismograph. First Earthquake occurs 6,560 km Pwaves arrive. First Swaves arrive. away. 10 15 20 25 Time (minutes) How fast did the P waves travel in km/s? km/s How fast did the S waves travel (in km/s)? km/s How long (in seconds) did the P waves and the S waves take to travel 200 km from the epicenter? Assume the wave speeds are constant. P waves S waves Seismic wave strength

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