Physics

Physics, 12.07.2019 19:30, laurabwhiddon

1show that the decay of power density for a wave radiated by an antenna (1/r2) results from the increase in the area of a sphere centered on the antenna and the fact that the total radiated power is conserved.

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Physics, 10.07.2019 19:20, darrieg

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Physics, 10.09.2019 19:30, jessicad8776

Public television station kqed in san francisco broadcasts a sinusoidal radio signal at a power of 316 kw. assume that the wave spreads out uniformly into a hemisphere above the ground.a) at a home 5.50km away from the antenna, what average pressure does this wave exert on a totally reflecting surface? answer in pa unitsb)at a home 5.50km away from the antenna, what are the amplitudes of the electric and magnetic fields of the wave? answer in n/c, tc) at a home 5.50km away from the antenna, what is the average density of the energy this wave carries? answer in j/m^3d) for the energy density in part (c), what percentage is due to the electric field? e)for the energy density in part (c), what percentage is due to the magnetic field?

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1show that the decay of power density for a wave radiated by an antenna (1/r2) results from the incr...

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