I believe the answer is B:)
For earthquakes, there is a lapsed time between the arrival of the
p-wave and the s-wave, because the waves travel at different speeds. The length
of this period of time determine the
distance to the epicenter.
Earthquakes create seismic waves. P waves are faster than S
waves. As the P and S waves move out from an earthquake, the P waves get ahead
of the S waves. The distance of a seismic station from an earthquake can be
determined from the time difference between the time of arrival of the first P
wave and the first S wave.
I think the answer is C. A mixture of fuel oil and compressed air is ignited.
hope this helps. :)
Answer: "hydrologic cycle" .
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A majority of the worlds population tends to concentrate on coastal regions primarily for access to trade or business with other countries.
