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Nerve cells are long, thin cylinders along which electrical disturbances
(nerve impulses) travel. The cell membrane of a typical nerve cell consists of an inner and an
outer wall separated by a distance of 0.10 μm The electric field within the cell membrane is
7.0 × 105 N/C. Approximating the cell membrane as a parallel-plate capacitor, determine the
magnitude of the charge density on the inner and outer cell walls.

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