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History, 15.07.2020 01:01, em387p3s1zr
A sound wave traveling downward with a speed of about 4,000 m/s suddenly slows to 1,500 m/s not far below the Earth’s surface. What has the sound wave most likely encountered? (Its B) A. a different kind of rock B. an underground lake C. an open cavity D. a pile of dinosaur bones
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Answers: 3
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A sound wave traveling downward with a speed of about 4,000 m/s suddenly slows to 1,500 m/s not far...
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