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April 27, 2015

Homework Help: physics

Posted by taryn on Sunday, April 7, 2013 at 8:03pm.

A 2.10 m diameter university communications satellite dish receives TV signals that have a maximum electric field strength (for one channel) of 7.90 ÁV/m.


(a) What is the intensity of this wave?
W/m2?
(b) What is the power received by the antenna?
W?
(c) If the orbiting satellite broadcasts uniformly over an area of 1.50 x 10^13 m2 (a large fraction of North America), how much power does it radiate?
W?

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