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December 3, 2016

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 20°C. How long after the stone is dropped will the boy hear the echo?
The speed of sound through air at 20°C is v = 343 m/s.

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