Average Amplitude of Waves
from 2009 to 2011
A structural engineer is using this table to design a wall
to protect a city near the ocean.
How high should the engineer build the wall?
Average Amplitude
(meters)
50 meters
O 100 meters
150 meters
200 meters
2009
2010
Year
2011
2012

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)