In which of the following does Einstein's famous equation apply A. a driver brings a car to a halt
B. collisions between objects
C. water falling in a waterfall
D. nuclear fission and fusion reactions

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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?

A1.5m wire carries a 2 a current when a potential difference of 52 v is applied. what is the resistance of the wire?