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To test the aerodynamics of a new prototype automobile, a scale model will be tested in a wind tunnel. For dynamic similarity, it will be required to match Reynolds number between model and prototype. Assuming that you will be testing a one-tenth-scale model and both model and prototype will be exposed to standard air pressure, will it be better for the wind tunnel air to be colder or hotter than standard sea-level air temperature of 15 °C? Why?
An elevator is hung by a steel rope. The rope has a cross-sectional area of 250mm2 and a modulus of elasticity of 70 GPa. the upward acceleration when the elevator starts is 4 m/s2. the rope is 100m long and the elevator weigh 1000 kg. determine the ..
Evaluate the effect of the water spray on efficiency (net work out divided by heat input) and net power out per kg/s of dry air coming into the turbine.
on average in the u.s. carson light trucks vans and slpvs are driven about 15000 exiles per year. the average fuel
a jet of water impinges on a vane and is deflected as shown. the volume flow rate is q 0.16 m3s and the nozzle speed
Determine the rated value of the power coefficient CP and compare this with the value at the Betz limit. Assume the air density ρ = 1.2 kg/m3
argon contained in a closed rigid tank initially at a temperature of 50c pressure of 2 bar and a volume of 2m3 is
Consider 0.8 grams of air (which may be assumed to be an ideal gas) at 295 K and 1.5 bar trapped in a rigid tank. An electrical heater is operated for 30 seconds. During this time the voltage across the heater is 12 V and 0.6 amps pass through the re..
Determine the mass products of inertia Ixy, Iyz, and Izx of the wire figure
The deep beam given in the Figure below has a width of 508 mm and a total height of 2032 mm. The deep beam carries two concentrated factored loads, Vu = 1601 kN each. Four bearing plates were provided at supports and loading locations that have dimen..
boron is diffused into highly pure germanium at 1000oc q 105 kcalmol do 1.1 x 10 m2sec. a steady surface
Air exits from the nozzle at 800m/s. find the air exit temperature from the compressor.
a particle moves in a circular path of radius r with speed v. it then increases its speed to 7v while traveling along
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