Examine the graph. After a P wave (blue line) has been traveling for 5 minutes, how much distance has been covered by an S wave (red line) generated by the same earthquake?
A) 1200 km
B) 1900 km
C) 2500 km
D) 3100 km
Answer: A
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A. Han. B. Tibetans. C. Mongolians. D. Uighurs.
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How do seismologists know the outer core is liquid?
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