Physics, 21.11.2019 00:31 puremousetail
Asatellite in geostationary orbit is used to transmit data via electromagnetic radiation. the satellite is at a height of 35,000 km above the surface of the earth, and we assume it has an isotropic power output of 1 kw (although, in practice, satellite antennas transmit signals that are less powerful but more directional).reception devices pick up the variation in the electric field vector of the electromagnetic wave sent out by the satellite. given the satellite specifications listed in the problem introduction, what is the amplitude e0 of the electric field vector of the satellite broadcast as measured at the surface of the earth? use Ļµ0=8.85Ć10^ā12c/(vā m) for the permittivity of space and c=3.00Ć10^8m/s for the speed of light.
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A5 foot by 5 foot box culvert is buried 6 feet beneath the surface of the ground. a crosssection of this very long culvert (into and out of the page) is illustrated below. assume that the soil in which the culvert is buried has the following properties: jt = 120 pcf, w = 12%, ko = 0.50, ka = 0.33, and kp = 3.00. calculate the total horizontal force per unit length of culvert (fh) felt on one of the vertical faces of the culvert.
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Asatellite in geostationary orbit is used to transmit data via electromagnetic radiation. the satell...
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