A negative charge -0550 microc exerts an upward 0700 n, Ask an Expert

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A negative charge -0.550 µC exerts an upward 0.700 N force on an unknown charge 0.280 m directly below it.

(a) What is the unknown charge (magnitude and sign)?

(b) What are the magnitude and direction of the force that the unknown charge exerts on the -0.550 µC charge?

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