In which of the following situations do the particles of the medium oscillate only parallel to the motion of the wave? energy used in cellular communication
energy used to microwave food
energy transmitted by ocean waves
energy transmitted by the cry of an eagle

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?