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Originally windmills were developed for milling grain for food production.
en.wikipedia.org/Windmill
www.alternative-energy-news.info/ct-the-output-of-wind-turbines
the potential difference between two points — or the difference in electric potential energy per unit charge between two points
en.wikipedia.org/Voltage
Preston Miller
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Updated on Apr 23, 12 Created on Apr 23, 12
Category: Science
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