What is the main difference between a longitudinal wave and a transverse wave?
O A longitudinal wave always travels faster than a transverse wave.
O A longitudinal wave does not need a medium to travel through.
O A transverse wave is made of particles that move perpendicular to the motion of the wave.
O A transverse wave always carries more energy so that it can travel through empty space.

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?