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July 3, 2015

Homework Help: physics

Posted by Anonymous on Wednesday, February 13, 2013 at 2:31pm.

A person, with his ear to the ground, sees a huge stone strike the concrete pavement. A moment later two sounds are heard from the impact: one travels in the air and the other in the concrete, and they are 2.7s apart. speed of sound in air is 343 m/s and concrete is 3000 m/s

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