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sunil1285 sunil1285
wrote...
Posts: 733
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6 years ago

Primary waves travel ____ as fast as secondary waves.
  a. half
  b. twice
  c. three times
  d. at the same speed

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wrote...
6 years ago

ANS: B
Although the primary and secondary waves are generated at the same time, primary waves move faster
than the secondary waves. Their behavior through the Earth's interior affects their speed. Information
can be found in the section The Study of Earthquakes Provides Evidence of Layering.

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