While attending a baseball game of his favorite major league team, John notices that he can
see the batter hit the ball before he hears the crack of the bat. Which of the following
statements best explains why there is a time lapse between seeing the baseball hit and hearing
it?
(1 Point)
A. Eyes reacting to stimuli faster than ears do.
B. Light waves travel in a more direct path than sound waves.
C. Sound waves travel more slowly in the air than light waves do.
D. Sound waves from other sounds cause interference with sound waves from the bat.

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)