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A conducting solid sphere of radius 20.0 cm is located with its center at the origin of our three-dimensional coordinate system. A charge of 0.429 nC is applied to the sphere.

a) What is the magnitude of the electric field at point (x,y,z) = (23.9 cm, -0.9 cm, 0 cm)?

b) What is angle of this electric field with respect to the x-axis at this point? (Please give your answer in degrees!)

c) What is the magnitude of the electric field at point (x,y,z) = (2.1 cm, -0.9 cm, 0 cm)?

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