Engineering Questions
Engineering is the use of scientific principles to design and build machines, structures, and other items, including bridges, tunnels, roads, vehicles, and buildings. The discipline of engineering encompasses a broad range of more specialized fields of engineering, each with a more specific emphasis on particular areas of applied mathematics, applied science, and types of application.
At steady state, air at 200 kPa, 325 K, and mass flow rateof 0.5 kg/s enters an insulated duct having differing inletand exit cross-sectional areas. The inlet cross-sectional area is6 cm26cm 2. At the duct exit, the pressure of the air is 100 kPa and the velocity is 250 m/s. Neglecting potential energyeffects and modeling air as an ideal gas with constant cp=1.008 kJ/kg⋅Kc p =1.008kJ/kg⋅K, determine(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 (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 cm