Question

A cell membrane consists of an inner and outer wall separated by a distance of approximately 10nm. Assume that the walls act like a parallel plate capacitor, each with a charge density of 10-5C/m2, and the outer wall is positively charged. Although unrealistic, assume that the space between cell walls is filled with air.

part A:

What is the magnitude of the electric field between the membranes?

Part B:

What is the magnitude of the force on a Mg++ ion between the cell walls?

Part C:

What is the potential difference between the cell walls?

Part D:

What is the direction of the electric field between the walls?

Part E:

If released from the inner wall, what would be the kinetic energy of a 9fC charge at the outer wall? 1fC=10−15C.

Answer 1

as per the guidelines of Chegg I'm supposed to answer only first four parts of the question.