Engineering, 14.11.2019 20:31, jaimephelps17
Two current sheets are fixed in free space in the x = 0 plane and the x = lambda/4 plane with surface current densities given by j_s (t) = j_1 cos(omega t + phi) z cap a/m and j_8(t) = j_2 cos(omega t)y cap a/m, respectively, where j_1, j_2, and phi are real numbers. tem waves will propagate away from each sheet and superpose with each other to create a wavefield whose polarization depends on the phase phi of the surface current at x = 0 and on the ratio j_2/j_1. assuming that j_2/j_1 = 1, determine the value(s) for phi required for the superposed tem waves propagating in the region x > lambda/4 to have the following polarizations. justify your choice of phi case by determining the electric field phasor produced in the region x > lambda/4 with your choice of phi. a) right handed circular polarization b) left handed circular polarization c) linear polarization
Answers: 1
Engineering, 04.07.2019 18:10, katelynn73
Atmospheric air has a temperature (dry bulb) of 80° f and a wet bulb temperature of 60° f when the barometric pressure is 14.696 psia. determine the specific humidity, grains/lb dry air. a. 11.4 c. 55.8 d. 22.5 b. 44.1
Answers: 1
Engineering, 04.07.2019 18:20, RiverH246
Air flows over a heated plate àt a velocity of 50m/s. the local skin factor coefficient at a point on a plate is 0.004. estimate the local heat transfer coefficient at this point. the following property data for air are given: density = 0.88kg/m3 , viscosity 2.286 x 10 ^-5 kgm/s , k = 0.035w/mk ,cp = 1.001kj/kgk. use colburn reynolds analogy.
Answers: 1
Engineering, 04.07.2019 19:10, nbunny7208
What is the chief metrological difference between measuring with a microscope and with an electronic comparator? a. the microscope is limited to small workpieces. a. the microscope is limited to small workpieces. c. the comparator can only examine one point on the workpiece. d. the microscope carries its own standard.
Answers: 1
Two current sheets are fixed in free space in the x = 0 plane and the x = lambda/4 plane with surfac...
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