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Ray La Foy's Articles in Science

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  • Helicopter History and the Technology of Today
    When the helicopter hovers, the force generated by the rotating blades is equal to the weight of the helicopter.
  • A GPS System Will Take You Anywhere
    The GPS (Global Positioning System) is a "constellation" of 24 well-spaced satellites that orbit the Earth and make it possible for people with ground receivers to pinpoint their geographic location.
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