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Application: Radar cross-section. A small radar is used to measure the radar cross-section of a small airplane as part of the certification process. The radar transmits 100 W at 6 GHz. The antenna has a gain of 20 and is. placed 100 m from the airplane (in the far field) so that the plane is in the direction of maximum antenna directivity. The received power at the radar's antenna is 100 nW. If propagation is in free space and there are no losses in the antenna, calculate the radar cross section of the airplane.
a rigid 1.0 m3 tank contains water initially at 120oc with 50 liquid and 50 vapor by volume. a pressure-relief valve on
what is the difference between steady state and non steady state diffusion procces? use mathematical expresions for
consider two types of steady-state expansionthrottling devices for ammonia 1 a rigid valve amp 2 a turbine that is used
A pitot-static tube is inserted in a pipe carrying water at 10°C. A differential manometer using mercury as the gage fluid shows a deflection of 106 mm. Calculate the velocity of flow.
If there are nine equally spaced pumps, estimate the horsepower each pump must deliver.
a team of astronomers have proposed to construct a large parabolic telescope mirror by spinning a cylindrical container
Find the Output power of electric motor, produced torque, tangential force on shaft, and force produced at endow the blade and at .125 m on blade
What is the net rate of radiation exchange between the spheres - What is the net rate of radiation exchange between the surfaces if they are diffuse and gray.
Compute an equilibrium where the price of good 1 is 1. The equilibrium price of good 2 and the equilibrium allocations will be formulas in terms of the endowments. (Hint: The endowments of good 1 are so large that each consumer consumes a positive..
The unit must provide 1.5 kg/s bleed air and a shaft power of 200 kW. Calculate (a) the total compressor air mass flow and (b) the power available with no bleed flow, assuming the following:
An alcohol manufacturing facility emits air with 500 ppm ethanol. The air flows out several roof vents at a total flow rate of 1000 m³/min (at 25 ° C and 1 atm). The facility is required to collect all the vented air and route it to a bio filter to c..
the altimeter on a low-speed piper aztec reads 8000 ft. a pitot tube mounted on the wing tip measures a pressure of
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