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A solid insulating sphere has total charge Q and radius R. The sphere's charge is distributed...

A solid insulating sphere has total charge Q and radius R. The sphere's charge is distributed uniformly throughout its volume. Let r be the radial distance measured from the center of the sphere.

If E = 440 N/C at r=R/2, what is E at r=2R?

Express your answer with the appropriate units.

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