The figure gives the magnitude of the electric field inside and outside

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The figure gives the magnitude of the electric field inside and outside a sphere with a positive charge distributed uniformly throughout its volume. The scale of the vertical axis is set by Es = 5.0 × 10^7 N/C. What is the charge on the sphere?
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I saw your youtube clip with great interest. What are the references for the two E equations related to the two cases of r's? Should the E equations account for q densities? Are there E equations for a general filled body, and for special filled rectangular boxes and other shapes? Thank you.

georgepul