Water is to be pumped through a 100-mile of the Rub’al Khali desert in a smooth concrete pipe (=0.005ft) at a flow rate of 5 ft3/s. The density is 1.908 slug/ft3, and viscosity 0.975×10-5lbf. s/ft2. Calculate the pipe size if the pumps are designed to handle a head loss of only 200 ft

Asteam is contained in a rigid tank with a volume of 1 m3. initially, the pressure and temperature are 7 bar and 500 oc, respectively. the temperature drops due to cooling process. determine: (1) the temperature at which condensation begins in °c, (2) the fraction of the total mass that has condensed when the pressure decreased to 0.5 bar. (3) the volume in m3 occupied by saturated liquid at the final state?