Tue, Feb 24, 2015 8:33 PM in Amber and Attraction
Rubber is a processed plant "resin" aka sap. Rubber rod will charge when rubbed with silk
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Tue, Feb 24, 2015 8:31 PM in Physics Songs
They Might Be Giants: Here Comes Science
Tue, Feb 24, 2015 8:20 PM in Circuits
+1 on the snapcircuits
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