(a) an electron in a television tube travels the 12 cm distance from the grid to the screen at an average speed of 2.00 107m/s. how long does the trip take? s (b) an electron in a current-carrying wire travels at an average speed of 7.00 10-5 m/s. how long does it take to travel 12 cm?

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?