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April 24, 2014

Homework Help: Physics HELP!!

Posted by sarah on Wednesday, November 21, 2012 at 11:39am.

Earthquakes are essentially sound waves travelling through the earth. They are called seismic waves. Because the earth is solid, it can support both longitudinal and transverse sismic waves, which travel at different speeds. The speed of longitudinal waves, called P waves, is 7707.0m/s. Transverse waves, called S waves, travel at a slower 3800.0m/s. A seismograph records the two waves from a distant earthquake. If the S wave arrives 3.82min after the P wave, how far away was the earthquake? You can assume that the waves travel in straight lines, although actual seismic waves follow more complex routes.

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