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Determine the tube diameter that corresponds to a 10% reduction in the convection heat transfer coefficient for thermal and momentum accommodation coefficients of αt = 0.92 and αp = 0.89, respectively. Determine the channel spacing, a, that is associated with a 10% reduction in h using the same accommodation coefficients. The gas is air at T = 350 K and atmospheric pressure for both the tube and the parallel plate configurations. The flow is laminar and fully developed with constant surface heat flux.
the mass of the ball is m2kg and the strings length is l1m. the ball is released from rest in position 1 and swings to
Determine the speed and the mass flow rate at the downstream section where the Mach number is 4.0. Explain your answer in explicit details, and list all steps leading up to your final answer.
Steam is throttled from 9 MPa and 500V to a pressure of 7 MPa. Determine the decrease in exergy of the steam during this process. Assume the surroundings to be at 25C.
Consider a flat plate mounted in the test section of a supersonic wind tunnel – assume the nozzle is perfectly expanded. The plate is at an angle of attack of -10° and the static pressure on the bottom surface of the plate is 1.0 atm. The nozzle thro..
a metal matrix composite mmc is made of a 2024 al alloy matrix and continuous nbspboron fibers. the boron fibers are
find the maximum value of this torque without causing yielding of the shaft according to various theory of failures
For the continuous beam shown, Determine all moments and shears for service loads of 2.00 kips/ft dead load (includes weight of beam and slab) and 3.00 kips/ft live load.
What is the average velocity if the diameter changes to 6 in.? b. Express the average velocity in terms of an arbitrary diameter.
an ideal cold air-standard brayton cycle engine operates with air entering the compressor at 27 c. the pressure ratio
an air-water-vapor mixture enters a cooling apparatus at 40 degrees c and relative humidity is 80 percent. design calls
The average inventory is $250,000, and 5000 orders are placed in a year. What are the annual ordering and carrying costs?
Determine (a) the resultant couple acting on the plate if a = 8 in., (b) the value of a so that the resultant couple acting on the plate is 480 lb•in. clockwise.
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