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A solid nonconducting sphere of radius R = 5.5 cm has a nonuniform charge distribution of...

A solid nonconducting sphere of radius R = 5.5 cm has a nonuniform charge distribution of volume charge density ρ = (15.4 pC/m3)r/R, where r is radial distance from the sphere's center. (a) What is the sphere's total charge? What is the magnitude E of the electric field at (b) r = 0, (c) r = R/2.0, and (d) r = R?

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