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A small, m = 3.00 g plastic ball is suspended by a 20.0 cm long string in a uniform electric field as shown in Figure P19. If the ball is in...

A small, m = 3.00 g plastic ball is suspended by a 20.0 cm long string in a uniform electric field as shown in Figure P19.54. If the ball is in equilibrium when the string makes a 15.0° angle with the vertical, what is the net charge on the ball?
1 µC

Figure P19.54

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