When a potential difference of 150 v is applied to the plates of parallel-plate capacitor, the plates carry a surface charge density of 30 nc/cm^2. the spacing between the plates (in μm) is: a) 2.2 b) 1.1 c) 4.4 d) 6.6

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?