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Effective area of a monopole. The receiving antenna in an AM car radio is 1 m long monopole, vertical above the body of the car. AM reception is between 520 kHz and 1.6 MHz. Calculate the effective area of the antenna at the two extremes of the frequency range.
It is required to design a low-voltage, high-current, shunt-excited DC motor for hoisting drive in industrial overhead crane system. The output power of the machine is expected to be between (20+X) hp. The copper losses in the machine should ..
the general ledger of the fly-by-night fbn engineering company contained the following account balances.administrative
an air-standard otto cycle compression ratio of 9 absorbs 1000 btulbm of air. if at the beginning of the compression
An inventor claims to have developed a power cycle operating between hot and cold reservoirs at 1175K and 295K, respectively, that provides a steady state power output of (a) 28 kw, (b) 31.2 kW, while receiving energy by heat transfer from the hot re..
If the isentropic efficiency of the compressor is 72% and the pressure ratio is 2.2:1, for an inlet pressure and temperature of 1 bar and 25oC, calculate the compressor outlet temperature, the compressor outlet density and the power required to drive..
A journal of basic size of 75 mm rotates in a bearing. The tolerance for both the shaft and bearing is 0.075 mm and the required allowance is 0.10 mm. Find the dimensions of the shaft and the bearing bore.
Outdoor air leaks into a building through cracks in the walls at the rate of 700 m3/h (this is infiltratation). The outside air is at a temperature of -16.1C and a humidity ratio of 0.001 kgv/kga. The density of the outside air is1.4 kg/m3. The indoo..
a boiler produces saturated steam at 100psig pressure. the feedwater condensate returning to the boiler is saturated
a solar updraft tower is a large chimney which ventilates heated air from the area surrounding it. this air has been
how do you mathematically calculate the number of years it takes to pay off loan in one equation if yearly income is
Each of the two arms has weight w per unit length and supports weight W = 10wL at its end. Derive formulas for the maximum shear force and maximum bending moment in the arms, assuming b = L/9 and c = L/10.
determine the allowable moment M if the factor of safety with respect to buckling is n = 2.0.
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