Two power lines, each 300 mm in length, run parallel to each other with a separation of 23 cmcm . Part A If the lines carry parallel currents of 120 AA , what is the magnitude of the magnetic force each exerts on the other?

Air initially at 0.75 bar, 1000 k, and occupying a volume of 0.12 m^3 undergoes two processes. process 1-2: the air is compressed isothermally until the volume is halved. process 2-3: the air undergoes a constant pressure process until the volume is halved again. assume ideal gas behavior. a) determine the mass of the air, in kg. b) the work and the heat transfer for each of the two processes, in kj. (100 kj = 1 bar . m^3)