A typical cell has a membrane potential of -70 mV, meaning that the potential inside the cell is 70 mV less than the potential outside due to a layer of negative charge on the inner surface of the cell wall and a layer of positive charge on the outer surface. This effectively makes the cell wall a charged capacitor. Because a cell's diameter is much larger than the wall thickness, it is reasonable to ignore the curvature of the cell and think of it as a parallel- plate capacitor. Part A How much energy is stored in the electric field of a 50-um-diameter cell with a 7.0-nm-thick cell wall whose dielectric constant is 9.0? Express your answer to two significant figures and include the appropriate units. Uc= O μÅ Value Submit Request Answer Units Constan ?

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A typical cell has a membrane potential of -70 mV,
meaning that the potential inside the cell is 70 mV
less than the potential outside due to a layer of
negative charge on the inner surface of the cell wall
and a layer of positive charge on the outer surface.
This effectively makes the cell wall a charged
capacitor. Because a cell's diameter is much larger
than the wall thickness, it is reasonable to ignore
the curvature of the cell and think of it as a parallel-
plate capacitor.
Part A
How much energy is stored in the electric field of a 50-um-diameter cell with a 7.0-nm-thick cell wall whose dielectric
constant is 9.0?
Express your answer to two significant figures and include the appropriate units.
Uc =
Submit
I
μÅ
Value
Provide Foodbooks
Request Answer
Units
Constant
?
Transcribed Image Text:A typical cell has a membrane potential of -70 mV, meaning that the potential inside the cell is 70 mV less than the potential outside due to a layer of negative charge on the inner surface of the cell wall and a layer of positive charge on the outer surface. This effectively makes the cell wall a charged capacitor. Because a cell's diameter is much larger than the wall thickness, it is reasonable to ignore the curvature of the cell and think of it as a parallel- plate capacitor. Part A How much energy is stored in the electric field of a 50-um-diameter cell with a 7.0-nm-thick cell wall whose dielectric constant is 9.0? Express your answer to two significant figures and include the appropriate units. Uc = Submit I μÅ Value Provide Foodbooks Request Answer Units Constant ?
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