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jeka94
3 years ago
12

3. What ecosystem has never been colonized by humans?

Biology
1 answer:
kicyunya [14]3 years ago
3 0
The ocean and the arctic.
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A seismic recording station located 4000 kilometers from the epicenter of an earthquake received the first P-wave at 7:10:00 p.m
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<h3>Co-ordinates</h3>

Question Parameters:

A seismic recording station located 4000 <em>kilometers </em>from the epicenter

an earthquake received the first P-wave at 7:10:00 p.m. (h:min:s).

Generally

From t-x diagram, the x axis marks the distance of the <em>station </em>from the epicenter.

Hence we have that the P wave took 7 min to reach the station.

Arrival time of P and S wave is

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Therefore

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The S wave arrived at = 07:15:40 pm.

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