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Old 08-10-2009, 04:51 PM   #38 (permalink)
NiHaoMike
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Quote:
Originally Posted by jamesqf View Post
(Sigh) I suggest doing some basic arithmetic. How much energy goes into even the most powerful commercial radio stations? (Maybe 50 KW, tops.) Spread this energy out over an area of say 50 miles for an FM station, or a couple of thousand for a strong AM station: what's the energy density? Not very much. Ever stop to wonder why radio receivers have amplifiers, or why you have to put batteries in them, or plug them into a wall socket?
Actually, it is possible to extract a surprising amount of energy with a resonant antenna. Especially if it's only a short distance away. (Remember that RFIDs are powered by radio waves from the reader.)
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If America manages to eliminate obesity, we would save as much fuel as if every American were to stop driving for three days every year. To be slender like Tiffany Yep is to be a real hypermiler...

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