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3. A 2.2 nano Coulomb charge is placed at the origin. A 5.1 nano Coulomb charge...

3. A 2.2 nano Coulomb charge is placed at the origin. A 5.1 nano Coulomb charge is placed at +5.3 cm on the X axis. (a) Find all locations on the X axis where the electric field is zero. (b) Find the location, magnitude, and sign of a charge placed such that the entire system is in equilibrium.

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