In the Bohr model of the hydrogen atom, the electron moves in a circular orbit of radius 5.3Ã10^â11m with a speed of 2.2Ã10^6m/s. If we are viewing the atom in such a way that the electronâs orbit is in the plane of the paper with the electron moving clockwise. Find the magnitude and direction of the electric and magnetic fields that the electron produces at the location of the nucleus (treated as a point).

4r-134a enters the condenser of a residential heat pump at 800 kpa and 50°c at a rate of 0.022 kg/s and leaves at 750 kpa subcooled by 3°c. the refrigerant enters the compressor at 200 kpa superheated by 4°c determine (a) the isentropic efficiency of the compressor, (b) the rate of heat supplied to the heated room, and (c) the cop of the heat pump. also, determine (d) the cop and rate of heat supplied to the heated room if this heat pump operated on the ideal vapor-compression cycle between the pressure limits of 200 and 800 kpa. (0.757, 4.37 kw, 5.12, 6.18, 3.91 kw)