Can someone explain to how the answer for number 75 on the physics portion is B.) the needle will spin counterclockwise? I looked at the answers and I still don't get it. Is it because the current carries electrons so according to the right hand rule, or left hand rule since I am dealing with electrons, will cause the Force to move out of the board on the left side and Force is moving into the board on the right? Also for number 96 and 98, I thought that since there was friction, conservation of energy does not occur, yet the answers says that since coefficient of kinetic friction is really small, it can be ignored. So the answers applied PE=KE. But I always thought that even with some amount of friction energy is not conserved?