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September 23, 2014

Homework Help: physics

Posted by Pat on Monday, May 21, 2012 at 5:11pm.

A boy drops a 0.10 kg stone down a 150 m well and listens for the echo. The air temperature is 20C. How long after the stone is dropped will the boy hear the echo?
The speed of sound through air at 20C is v = 343 m/s.

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