🤓 Based on our data, we think this question is relevant for Professor Becker's class at TAMU.
Area of a sphere:
The Gaussian surface is a sphere with a radius of r. We'll use -Q for the charge enclosed.
The closed integral of dA = A
A hollow non-conducting spherical shell has inner radius R1 = 8cm and outer radius R2 = 15 cm. A charge Q = - 45 nC lies at the center of the shell. The shell carries a spherically symmetric charge density ρ = Ar for R1 < r <R2 that increases linearly with radius, where A= 29 μC/m4
Write an equation for the radial electric field in the region r<R1 in terms of Q, r and Coulomb's constant k. You may take the positive direction as outward.
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