When you step on a roach, the roach applies an equal and opposite force on your foot as your foot applies
to the roach (we don't advocate killing insects this way, especially if you are barefoot).
Choose 1
True
False

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?