9.4. An unconfined aquifer with a specific yield of 0.20 is used as a water supply for the ir- rigation of farm land. The recharge area of the aquifer is the same area as the irri- gated area. The recharge is limited to 76 mm (3.0 in.) per year. The saturated thick- ness of the aquifer is 15.2 m (50ft). How many years will the water supply last if 254 mm (10.0 in.) of water per year is pumped from the aquifer for irrigation

An open feedwater heater operates at steady state with liquid entering at inlet 1 with t? = 40°c and pl = 1 .2 mpa. water vapor att2-200°c and p2 = 1.2 mpa enters at inlet 2. saturated liquid water exits with a pressure of pa 1.2 mpa. neglect heat transfer with the surroundings and all kinetic and potential energy effects, determine the mass flow rate of steam at inlet 2 if the mass flow rate of liquid water at inlet 1 is given as 2 kg/s.