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A parallel plate is suspended from the ceiling. A metal ball with a mass of 0.80...

A parallel plate is suspended from the ceiling. A metal ball with a mass of 0.80 kg is charged to
–7.5 x 10-5 C. A) What is the strength and direction of the electric fielded needed to keep the ball suspended
0.5 m below the plate? B) What is the charge on the plate?

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