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Arbitrary-length dipole. A communication system uses a dipole antenna for transmission. Calculate the power density recieved 5 km away given the following: I0 = 2 A, dipole length is d = 10 mm, λ = 1 m, propagation is in free space, and θ= 90°. State the assumptions you use in the calculation.
for a first order system with a transfer function of 15s2 given a unit step input pleasea. derive the transfer function
one way to decrease the power needed to compress a gas using a compressor is to encompass the compressor in a water
A balloon behaves so the pressure is P = C2V1/3, C2 = 100 kPa/m. The balloon is blown up with air from a starting volume of 1 m3 to a volume of 3 m3. Find the final mass of air assuming it is at 25oC and the work done by the air.
water initially saturated vapor at 4 bar fills a closed rigid container. the water is heated until its temperature is
A satellite is in Earth orbit with an altitude at perigee of 555.0 km and an altitude at apogee of 1200.0 km. a. What is the semi-major axis of the orbit? b. What is the eccentricity? c. If the true anomaly is 160 degrees, what is the satellite's ..
Obtain the equation representing the displacement of the mass at time t > 0 when M = 50 kg, B = 180 N s m-1 and
A Carnot refrigerator using R-134a absorbs heat from a refrigerated space at 0oC and rejects heat to a kitchen at 27oC.The refrigerant enters the evaporator with a quality of zero and exits with a quality of one. The operating pressure of the evapora..
a 2-kw pump is used to pump kerosene rho 0.820 kgl from a tank on the ground to another tank 30 m above the ground.
Plot the temperature distribution for the entire strip
a hot gold brick with a volume 0.01m3 and initially at a temperature 95oc is dropped into an enclosed kiddle pool of
an adiabatic capillary tube is used in some refrigeration systems to drop the pressure of the refrigerant from the
The peak level of light is received when the windows of the moving disk coincide with the windows of the masking disk.
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