Coulomb's Law for Three Aligned Charges

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Charges 1 and 2 are fixed in place. is the force of charge 1 on charge 3, and
is the force of charge 2 on charge 3. The blue point shows the place where the two forces balance.
Contributed by: Eduard Mihranyan (July 2014)
(Mathematica Summer Camp 2014)
Open content licensed under CC BY-NC-SA
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"Coulomb's Law for Three Aligned Charges"
http://demonstrations.wolfram.com/CoulombsLawForThreeAlignedCharges/
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Published: July 18 2014