If a child applies a 3 N force for 2 m in the same direction the car is already moving, how much work is done on the car?

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)

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge

The electric field inside a cell membrane is 8.0mn/c. what's the force on a singly charged ion in this field?