<html><body bgcolor="#FFFFFF"><div>Hard. &nbsp;Basically the result of a random walk over time; there's no way to constrain the torque in one direction. So you will have to wait… and get lucky.&nbsp;</div><div><br></div><div>But see this table that can sort parts:</div><div><br><a href="http://www.cs.berkeley.edu/~jfc/dreznik/UPM2000/media/Story%20Model.htm">http://www.cs.berkeley.edu/~jfc/dreznik/UPM2000/media/Story%20Model.htm</a><br><br></div><div><br>On Sep 29, 2011, at 8:39 PM, Glen Jarvis &lt;<a href="mailto:glen@glenjarvis.com">glen@glenjarvis.com</a>&gt; wrote:<br><br></div><div></div><blockquote type="cite"><div><div>How hard would it be to make a device the was able to unscrew a screw with sonic vibrations in real life? I'm thinking the type of vibrations the loosen bolts in vehicles when they've been driven on rough roads for long periods of time?<br><br></div><div>Glen</div><div><br>On Sep 29, 2011, at 7:19 PM, Brian Morris &lt;<a href="mailto:cymraegish@gmail.com"><a href="mailto:cymraegish@gmail.com">cymraegish@gmail.com</a></a>&gt; wrote:<br><br></div><div></div><blockquote type="cite"><div>A real sonic screwdriver<br><br><a href="http://www.youtube.com/watch?v=IPR4dQMcTNY&amp;feature=player_embedded"></a><a href="http://www.youtube.com/watch?v=IPR4dQMcTNY&amp;feature=player_embedded"><a href="http://www.youtube.com/watch?v=IPR4dQMcTNY&amp;feature=player_embedded">http://www.youtube.com/watch?v=IPR4dQMcTNY&amp;feature=player_embedded</a></a><br><br><a href="http://www.popsci.com/technology/article/2010-12/sonic-screwdriver-could-produce-ultrasonic-force-fields-manipulate-objects-scientists-say"></a><a href="http://www.popsci.com/technology/article/2010-12/sonic-screwdriver-could-produce-ultrasonic-force-fields-manipulate-objects-scientists-say"><a href="http://www.popsci.com/technology/article/2010-12/sonic-screwdriver-could-produce-ultrasonic-force-fields-manipulate-objects-scientists-say">http://www.popsci.com/technology/article/2010-12/sonic-screwdriver-could-produce-ultrasonic-force-fields-manipulate-objects-scientists-say</a></a><br>
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