Problem situation: "A sphere of radius R has a total charge Q. The volume charge density (C/m^3) within the sphere is p(r) = C/r^2, where C is a constant to be determined."part A: I solved this successfully.part B: This is where I'm stuck: "Use Gauss's Law to find the Electric Field Strength E inside the sphere, r I tried (Q*r)/(4*pi*e0*R^3) and (p*r)/(3*e0) but Pearson won't accept either answer.

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.