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Space vehicles traveling through Earth's radiation beltscan intercept a significant number of electrons. The resultingcharge buildup can damage electronic components and disruptoperations. Suppose a spherical metallic satellite 1.9 m indiameter accumulates -1.8 µC of charge in one orbitalrevolution.

(a) Find the resulting surface charge density.

(b) Calculate themagnitude of the electric field just outside the surface of thesatellite, due to the surface charge.

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