Two horizontal parallel plates are separated by a distance of (176 mm) creating an electric field of (21 µN/C) directed north. An electron is place halfway between the two plates with and fired with initial velocity (56 m/s) from the horizontal. Calculate the time it takes for the electron to land at the positive plate and its speed before hitting the plate.

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?