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A 40-mph wind below past your house speeds up as it flows up and over the roof. If the elevation effects are negligible, determine: 6 marks a) The pressure at the point on the roof where the speed is 60 rpm if the pressure in the free stream blowing toward your house is 14.7 psia. Would this effect tend to push the roof down against the house, or would it tend to lift the roof?3 marks b) The pressure on a window facing the wind if the window is assuming to be a stagnation point.
Consider the 2.0micrometer long GaAs device where the E-field is 5kV/cm and Mn*=.067M0. Calculate the transit time of an electron through the device if the mobility is 8000 cm^2V-s.
Find the turbine's (b) isentropic efficiency (%), (c) reversible work (kJ/kg), (d) irreversibility(kJ/kg), and (e) exergy destruction (kJ/kg). (f) Draw a T-s diagram of the process
If the truck starts from rest when xD is zero, and moves forward with a constant acceleration of aD = 5 m/s2, determine the speed of the block at the instant xD = 3 m.
Design the number of teeth and depth of teeth need be chosen. Considerations include the turn angle for each stroke, the bearing stress on the teeth and pins and shear stress on the teeth.
Discuss the factors beyond crystal structure, quenching and temperature that affect he results of a specimen in a Charpy V notch impact testing.
a concrete pier of square cross section is 6m high. the sides taper uniformly from a width of 0.5 m at the top to 1.0 m
Temperature Effect on Materials (i) A hollow cylinder of aluminium 1 m long with a 40 mm outside diameter is at a temperature of 20 °C. What is the change in length and circumference of the cylinder when it is cooled to â?'25 °C
Find Max Level Airspeed at 95% RPM and find Max Range Airspeed (VBR) and Max Endurance Airspeed (VBE) - find Max Specific Range and Max Range Airspeed
a pitot-static probe connected to a water manometer is used to measure the velocity of air. if the de?ection
An ideal vapor-compression refrigeration cycle uses R-134a as the working fluid in an air-conditioning system. The refrigerant enters the compressor as a saturated vapor at 40 °F
Two control rods are attached at A to lever AB. Using trigonometry and knowing that force in the right-hand rod is F2=20 lb, determine a.) the required force F1 in the left-hand rod if the resultant R of the forces exerted by the rods on the le..
assume you are given a spherical joint where the ball has a radius of 20 mm and socket has a radius of 22 mm. if the
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