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Electrostatics
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Section 1: The Atom and Charging Subatomic Particle Charges e: p: n:
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Conductors: Demos: Find materials in the room that are conductors Line up washer and charge with high voltage Charge distilled water, city water and Gadorate Pass charge through bike tire Insulators: Demos: Place a charge on a balloon and notice charge location. Have students charge a letter and then do the same. Ask how a copier works. Use VDG to see of charge Is confined to areas
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Ways to Charge an object 1) Charge by Contact or (friction):___________________________________
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Triboelectric Series: A List that ranks materials according to how well they charge either (+) or (-). (refer to hand out) + POSITIVE END OF SERIES (materials with lower work function) asbestos glass nylon wool lead silk aluminum paper cotton steel hard rubber nickel & copper brass & silver synthetic rubber orlon saran polyethylene teflon silicone rubber - NEGATIVE END OF SERIES (materials with higher work function)
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Charge by Polarization: Force between Charges: Demo: Have students hold balloons with charge to eachother. Electrons and Electrons:_________ Protons and Protons:____________ Electrons and Protons:___________
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Charge By Induction
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How a VDG Works
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Extension Activities: Pie Pan Activity: 1) Describe How to make the aluminum ball bounce back and forth when you touch the ball. 2) Describe why the aluminum ball bounces back and forth when you touch it.
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Extension Activities Continue Van de Graaf Generator LabText Reflection Problems
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