The membrane that surrounds a certain type of living cell has a surface area of 6.0 x 109 m² and a thickness of 2.0 x 108 m. Assume that the membrane behaves like a parallel plate capacitor and has a dielectric constant of 4.4. (a) The potential on the outer surface of the membrane is +84.6 mV greater than that on the inside surface. How much charge resides on the outer surface? (b) If the charge in part (a) is due to K* ions (charge +e), how many such ions are present on the outer surface?
The membrane that surrounds a certain type of living cell has a surface area of 6.0 x 109 m² and a thickness of 2.0 x 108 m. Assume that the membrane behaves like a parallel plate capacitor and has a dielectric constant of 4.4. (a) The potential on the outer surface of the membrane is +84.6 mV greater than that on the inside surface. How much charge resides on the outer surface? (b) If the charge in part (a) is due to K* ions (charge +e), how many such ions are present on the outer surface?
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Transcribed Image Text:The membrane that surrounds a certain type of living cell has a surface area of 6.0 x 109 m² and a thickness of 2.0 x 108 m. Assume
that the membrane behaves like a parallel plate capacitor and has a dielectric constant of 4.4. (a) The potential on the outer surface of
the membrane is +84.6 mV greater than that on the inside surface. How much charge resides on the outer surface? (b) If the charge in
part (a) is due to K+ ions (charge +e), how many such ions are present on the outer surface?
(a) Number
(b) Number
i
Units
Units
00
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