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2. We've seen that a cell membrane can be modeled as two charged parallel surfaces since the thickness of the
membrane is much smaller than the size of the cell (5 nm vs ~ 10 um). We found that an electric field of
1.4 x 10 N/C corresponds to a membrane surface charge density of 1.24 x 10-4 C/m. Let's consider a
1 um X 1 um section of the membrane.
a. What is the potential difference between the two sides of the membrane?

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