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Consider the conditions of Problem 9.9, but now view the problem as one involving free convection between vertical, parallel plate channels. What is the optimum fin spacing S? For this spacing and the prescribed values of t and W, what is the rate of heat transfer from the fins?
Calculate the average thickness of the oxide film prior to compaction and sintering of the powders into the part.
(a) Determine the blade angles at leading and trailing edges of both the rotor and stator at the mean radii, (b) Calculate the mass flow rate and the power required for each stage.
What is the angular velocity Wcd (t)?
dry air having a mass flowrate of 2 kgs and a temperature of 300k merges with dry air flowing at 3 kgs and having a
an ideal gas undergoes two processes in a piston cylinder device from 1-2 a polvtropic compression from t1 and p1 with
a drum rools on a conveyor with is moving at a constant velocity of 3fts. the drum rolls without slipping on the
Reduce the diameter to 15 cm (with ε=1 mm), and compute the flow rates for water at 20°C. These flow rates distribute in nearly the same manner as in Prob. P6.121 but are about 5.2 times lower. Can you explain this difference?
in the absence of compressed liquid property tables it is common to approximate properties by using the saturated
What details of scaling might be important in such studies?
water at 25 degrees c enters a heat exchanger at 0.1 kgs and exits at 50 degrees c. kerosene enters the other side of
the refrigerator steadily receives a power input of 0.15 kw while rejecting energy by heat transfer to the surroundings
germanium forms a substitutional solid solution with silicon. compute the weight percent of germanium that must be
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