A conducting rod slides down between two frictionless vertical copper tracks at a constant speed of 5. 6 m/5 perpendicular to a 0. 58- magnetic field. The resistance of the rod and tracks is negligible. The rod maintains electrical contact with the tracks at all times and has a length of 1. 1 m. A 1. 1- 1 resistor is attached between the tops of the tracks. (a) What is the mass of the rod? (b) Find the change in the gravitational potential energy that occurs in a time of 0. 28 s. (c) Find the electrical energy dissipated in the resistor in 0. 28 s. (a) Number Units (b) Number Units (c) Number Units