Consider the NACA2418 airfoil. a) Given that the Reynolds number is Re= 5.9 E6 with standard roughness, find the angle of attack that leads to a drag coefficient of 0.016. b) At what value of the angle of attack are the values of parasite drag and induced drag the same? Take AR = 7, load factor n=1, efficiency factor e = 0.95, and wing loading of 100 lb/ft^2.

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.

Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)

Which from the following instrument is commonly used to detect the high pitch butzing sound in bearings? [clo4] a)-digital ultrasonic meter b)-infrared camera c)-spectroscopic d)-vibrometer