A block m1 of mass 5 kg moving at 10 m / s to the right collides with another block m2 of equal mass that was at rest on a horizontal plane without friction. Which of the following is not possible after the crash? a. M1 remains at rest and m2 is moving at 10 m/s to the right.
b. M1 moves 4 m/ to the right and m2 moves 6 m/s to the right.
c. M1 moves 2 m/s to the left and m2 moves 8 m/s to the right.
d. M1 and m2 move together 5 m/s to the right.
e. M1 moves 5 m/s to the left and m2 moves 15 m/s to the right.

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)