Be quick i dont have time my teachers here !
what provide support for the plate tectonic theory in the 1960s?

a)shape of the continental coastlines matching up together
b)mineral and fossil matches from tests done on different continents

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?