As a 5.00-kg sample of liquid mercury is cooled into a solid, it liberates 157kj of energy. what is the original temperature of the mercury? for mercury, the melting point is 234 k the heat of fusion is 11.3kj/kg and the specific heat is 140j/kg. k. 410 k
690 k
157 k
378 k

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?