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Question: Your given two concentric spherical metal shells, the smaller shell has a radius of 0.20 m and a surface charge of 9.3x10^-8 C and the larger shell has a radius of 0.7 m and a surface charge of -6.5x10^-8 on it.

A- Find the electric field at a point 0.39 m from the center of the spheres.

I don't just need an answer, work and explanations/walkthrough would be much appreciated! Thank you.

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