(3%) Problem 19: The voltage across a membrane forming a cell wall is 79 mV and

Question

(3%) Problem 19: The voltage across a membrane forming a cell wall is 79 mV and the membrane is 8.75 nm thick. What is the electric field strength in the cell wall, in volts per meter? Grade Summary Deductions Potential 0% 100% sin0 tan() | Submissions cos cotan asinO acosO) atan()acotan0sinhO) cosh0tanh0 cotanh0 Attempts remaining: Z % per attempt) detailed view 0 END Degrees Radians VO DELCLEAR Submit Hint I give up! Hints: 0% deduction per hint. Hints remaining: 1 Feedback: 0% deduction per feedback. Submission History Answer Hints Feedback Totals Totals 0% 0% 0% 0%

Explanation / Answer

electric field strength in the cell is

E = v /d

given that v = 79 mV = 79 *10 ^3 V

d = 8.75 nm = 8.75 *10 ^-9 m

E = v /d = 79 *10 ^3 V /  8.75 *10 ^-9 m

= 9.028 *10 ^6 V / m

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