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June 24, 2015
2:46

Media Object: Science Snack: Charge and Carry

Zap! Produce a pair of electric sparks using just a few simple materials: styrofoam, an aluminum pie plate, and a wool sock. When your finger comes near, you'll see, hear, and definitely feel the spark jumping the gap. Produce a second spark when you pick up the pie plate. Exploratorium physicist Paul Doherty explains how both are formed and why they travel.