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One of the problems of wind tunnel testing at airspeeds near sonic speed is the large effect on the flow conditions of a small change in the test configuration. Suppose sonic velocity in a wind tunnel with a 10 ft2 test section cross section is 1000 ft/s. Estimate the percentage change in the test section air speed when a model of 0.1 ft2 cross section is placed in the test section, if the air speed in the empty tunnel is 100, 900 and 1100 ft/s.
The car travels up the hill with a speed of v = (0.4s) m/s, where s is in meters, measured from A. Determine the magnitude of its acceleration when it is at point s = 50 m, where p = 500 m.
the average grain diameter for some metal alloy was measured as function of time at 650degc which is tabulated below at
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a feeder heater extracts steam from a turbine at 600kpa and 250c which it combines with 0.3 kgs of liquid at 600 kpa
if a water tank is to be installed on the roof top of the utpa administration building to supply water for the campus.
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