Your company has been asked to prepare a preliminary cost estimate for a three-story, 22,000 square foot office building. From projects you have constructed during the last year, you have determined that the average cost per square foot to construct an office building is $158.59. Using an inflation rate of 5 percent, prepare an estimate for the office building

At steady state, air at 200 kpa, 325 k, and mass flow rate of 0.5 kg/s enters an insulated duct having differing inlet and exit cross-sectional areas. the inlet cross-sectional area is 6 cm2. at the duct exit, the pressure of the air is 100 kpa and the velocity is 250 m/s. neglecting potential energy effects and modeling air as an 1.008 kj/kg k, determine ideal gas with constant cp = (a) the velocity of the air at the inlet, in m/s. (b) the temperature of the air at the exit, in k. (c) the exit cross-sectional area, in cm2