e voltage across a membrane forming a cell wall is 77.7 mV and the membrane is 9.02 nm thick. What is the electric field strength? (The value is surprisingly large, but correct.) You may assume a uniform E-f

I am unsure about how to solve the attached calculus question.

Q. The ends of the cylinder are made of conducting discs and the space between these discs are filled with an inhomogeneous ohmic medium whose conductivity o = L/(z+1). Where L is the separation distance of the discs. A d-c voltage Vo is applied across the discs as shown on the right. Determine V. a) The total resistance between the discs b) The surface charge densities on the discs c) The volume charge density and the total amount of charge between the discs

Suppose a van e Graff generator builds a negative static charge and grounded conductor is placed near enough to it so that a 7.0 x 10^6 coulombs of negative charge arcs to the conductor.  Can you help me to conceptualize the steps in calculating the number of electrons that are transferred?