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A solid sphere 10 cm in radius carries a uniform 40-μC charge distribution throughout its volume....

A solid sphere 10 cm in radius carries a uniform 40-μC charge distribution throughout its volume. It is surrounded by a concentric shell 20 cm in radius, also uniformly charged with 40 μC.

a) Find the electric field 5.0 cm from the center. Express your answer using two significant figures

b) Find the electric field 15 cm from the center. Express your answer using two significant figures.

c) Find the electric field 30 cm from the center. Express your answer using two significant figures.

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