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A fan that can provide air speeds up to 50m/s is to be used in a low-speed wind tunnel with atmospheric air at 25 °C. If one wishes to use the wind tunnel to study flat-plate boundary layer behavior up to Reynolds numbers of Rex = 108, what is the minimum plate length that should be used? At what distance from the leading edge would transition occur if the critical Reynolds number were Rex,c= 5 x105?
water is the working fluid in an ideal rankine cycle. superheated vapor enters the turbine at 8 mpa 450 degc. the
steam at 10 mpa and 450 degrees c enters an adiabatic turbine at 80 ms and exits at 10 kpa 92 quality and 50 ms. the
refrigerant-134a enters the evaporator coils placed at the back of the freezer section of a household refrigerator at
a brick wall 3 m high 7.5 m wide and 200 mm thick has a thermal conductivity of 0.7 wmcelcius. the temperature on the
steam enters the first-stage turbine shown in fig. 2 at 40 bar and 500degc with a volumetric flownbsprate of 90 m3min.
calculate the average distance moved in one day by smoke particles in air for the following cases a smoke diffuses in
a city engineer knows that she will need 25 million in 3 years to replace toll booths on a toll road in the city.
Demonstrate suitable accuracy by using a simple hand calculation for the static analysis of the structure. Describe in detail the hand calculations performed to validate the final solution. What is the approximate error between the simplified hand..
refridgerant 410a is initially at 120 f and quality of 30. it undergoes a constant-pressure process. the final state is
Calculate the steady state excess electron and hole concentrations as a function of distance into the semiconductor.
consider an adiabatic turbine with an isentropic efficiency of 85. the inlet pressure and temperature are 3.50 mpa and
the jeep has a weight of 2510lb and an engine which transmits a power of 100 hp to all the wheels. assuming the wheels
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