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A spherical shell extends from Ri to R0 with p(r) = Cr with C > 0...

A spherical shell extends from Ri to R0 with p(r) = Cr with C > 0 in the shell but zero for r < Ri and R > R0.

a.) What is the total charge in the shell, Qt?

b.) Assuming a point charge with charge -Qt is placed at the center of the shell, what are E and V for all regions of the space?

Thank you!

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