How does a GPS device tell our location?
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Bernard Nebel.
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The following description and video will give kids the basic concept of how a GPS gives our location.
http://www.physics.org/article-questions.asp?id=55
Have kids consider the careers, discoveries, and technologies that underlie their operation: thinking of the concept itself, designing and building the satellites, atomic clocks, rocketry to put them in orbit, etc.
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