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Earthquakes produce two kinds of seismic waves: he longitudinal primary waves (called P waves) and the transverse secondary waves (called S waves). Both S waves and P waves travel through Earth's crust and mantle, but at different speeds; the P waves are always faster than the S waves, but their exact speeds depend on depth and location. For the purpose of this exercise, we assume the P wave's speed to be 8790 m/s while the S waves travel at a slower speed of 5350 m/s.
If a seismic station detects a P wave and then 58.9 s later detects an S wave, how far away is the earthquake center?
A 5kg box is pushed across a level floor with a net force of 50 N in the direction of the displacement of 10m. What is the total work done on the box
Suppose you are planning a trip in which a spacecraft is to travelat a constant velocity for exactly eightmonths, as measured by a clock on board the spacecraft, and thenreturn home at the same speed.
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A thin rod sits along the x axis with one end at x= -1.0 m and the other end at x= 3.6 m. What is the total mass of the rod? Where is the center of mass of the rod located?
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