The voltage across a membrane forming a cell wall is 78.7 mV and the membrane is 8.52 nm thick. What is the electric field strength? (The value is surprisingly large, but correct.) You may assume a uniform E-field.
2. Relevant equations
3. The attempt at a solution
E=-(.00787V(8.52e-9m)) = 7.9e-11 V
i dont understand why this is wrong?