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If a charge “g" with mass "m" is self-suspended (hanging freely, no strings, wires, or support...

If a charge “g" with mass "m" is self-suspended (hanging freely, no strings, wires, or support of any material sort) below the surface of an infinite conducting x-y plane in the earth's gravitational field (acceleration = 9.8 m/s). Note: the z-axis is identical to the earth's radial vector in direction. How far from the plane must it be?

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please upvote.thanks

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