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May 3, 2008 Show on Earthquake Preparedness - May 03,2008

When you push sideways hard enough to overcome this friction, your fingers move suddenly, releasing energy in the form of sound waves that set the air vibrating and travel from your hand to your ear, where you hear the snap. ...

Posted in Centro not vibrating on June 19, 2008
Original article: May 3, 2008 Show on Earthquake Preparedness - May 03,2008
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