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Application: Double stub matching. An antenna has an impedance of 68+j10Ω. The antenna needs to be connected to a 75 n line. Because the antenna goes on a mast, the design engineer decided to fabricate a matching section as shown in Figure 15.38. The matching section is then hoisted and connected to the antenna during installation. At the required frequency, the section is 0.3λ and two stubs are made of the same line. Calculate the lengths of the stubs, if the antenna is connected at A-A.
ENB311 - Stress Analysis - Find the maximum shear stress and identify the section in which it occurs. All dimensions in mm and G = 27 GPa and describe the effect of a longitudinal crack in a circular shaft under torsion.
you have a heat engine that has a thermal energy resevoir available at 500c the thermal energy to heat the engine is at
the dredger is loading a sand onto a barge.the sand leaves the dredger pipe at 4ft/s with a weight flux of 850 lbs/s. estimate the tension on the mooring line caused by this loading.
the jmh company manufactures resistors with an ideal resistance value of 400 ohms. a sample of 2000 resistors were
steel rods of 0.05m diameter are heat treated by being passed through a heat-treating furnace in which the atmosphere
An octave is defined as a doubling of the frequency. The claim is made that a low-pass Butterworth filter of order n has a roll-off (attenuation) of 6n dB/octave. Calculate the gain in dB for a second-order filter for the cut-off frequency itself, an..
A water filled manometer is attached to the inlet and the test section of a low speed wind tunnel which has the contraction ratio of 3. what would be the pressure difference between the inlet and the test section in terms of inches of water in order ..
a distillation column is separating phenol from p-cresol at 1 atm pressure. the distilshylate composition desired is
An unsuited free diver can work in a pressure of up to 490KN/m^2 and a suited diver in pressure of up to 1815 KN/m^2. Calculate the maximum depths at which they might work in sea-water which has a specific gravity of 1.03.
a piston cylinder device having an initial volume of 2 m3 initially contains steam at 10 bars and 200oc state 1. the
Use the Bond work index method and assume that the feed characteristic size is 4 in. and that the feed particle-size distribution follows the RosinRammler model with n= 1.0.
Solve the preceding problem if the internal pressure is 3.75 MPa, the diameter is 19 m, the yield stress is 570 MPa, and the factor of safety is 3.0
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