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spin [16.1K]
3 years ago
8

Cell membranes (the walled enclosure around a cell) are typically about d = 7.1 nm thick. They are partially permeable to allow

charged material to pass in and out, as needed. Equal but opposite charge densities build up on the inside and outside faces of such a membrane, and these charges prevent additional charges from passing through the cell wall. We can model a cell membrane as a parallel-plate capacitor, with the membrane itself containing proteins embedded in an organic material to give the membrane a dielectric constant of about 12.
Required:
a. What is the capacitance per square centimeter of such a cell wall?
b. In its normal resting state, a cell has a potential difference of 85mV across its membrane. What is the electric field inside this membrane?

Physics
1 answer:
il63 [147K]3 years ago
6 0

Answer:

A. 1.24micro farad

B. 1.20x10^7V/m

Explanation:

See attached file

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Answer:

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4 years ago
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<h2>Explanation:</h2>

The change in internal energy (ΔE) of a system is the sum of the heat (Q) and work (W) done on or by the system. i.e

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<em>Substitute these values into equation (i) as follows;</em>

ΔE = -695 + 385

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Therefore, the change in internal energy is -310J

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<em />

<em />

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