Question: 1. A +7.00 C point charge and -9.00 C point charge are placed along the x -axis at x = 0.000 cm and x =

1. A +7.00 C point charge and -9.00 C point charge are placed along the x-axis at x = 0.000 cm and x = 40.0 cm, respectively. Where must a third charge, q, be placed along the x-axis so that it does not experience any net electric force due to the other two charges?

2. A 1.0-C point charge is 15 m from a second point charge, and the electric force on one of them due to the other is 1.0 N. What is the magnitude of the second charge? (k = 1/40= 8.99 10^9N m^2/C^2)

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