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September 3, 2014

Homework Help: math

Posted by mikeM on Thursday, June 30, 2011 at 4:57pm.

Earthquakes produce several types of shock waves. The most well-known are the P-waves (P for primary or pressure) and the S-waves (S for secondary or shear). In the earth's crust, the P-waves travel at around 6.5 km/s while the S-waves move at about 3.5 km/s. The actual speeds vary depending on the type of material they are going through. The time delay between the arrival of these two waves at a seismic recording station tells geologists how far away the earthquake occurred.

If the time delay is 33s, how far from the seismic station did the earthquake occur?

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