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As shown in the figure, a ball with a mass of 0.990 g and positive charge...

As shown in the figure, a ball with a mass of 0.990 g and positive charge of q=40.8 μC is suspended on a string of negligible mass in a uniform electric field.
prob04_ball_in_field.gif
We observe that the ball hangs at an angle of θ=23.0o from the vertical. What is the magnitude of the electric field?
(in N/C)

A: 5.712×101 B: 7.597×101 C: 1.010×102 D: 1.344×102 E: 1.787×102 F: 2.377×102 G: 3.162×102 H: 4.205×102
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LE TE 2 0.99 X10 3 ans) 40.& X10

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