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A positive charge ball hangs, attached to a thread of negligiblemass. Similarly a negative charged ball hangs attached to athread of negligible mass. Each ball has mass of 0.14g and amagnitude charge of q. Attracted to each other, each of theirthread form a 20 degree angle from the vertical. The ballsare separated by a distance of 2.05 cm.

a) find the magnitude of the electric force acting on eachball;   a)___________________
b) the tension in each thread, and      b)___________________
c) the magnitude of the charge on the balls     c)___________________

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