Science
Who discovered the rotating magnetic field that is the basis of Alternating Current?
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What is the maximum indirect fire range of a Browning M2 .50 caliber machine gun?
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Which of these is defined as "part of the electromagnetic spectrum that contains visible light"?
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Who was the commander of the first U.S. Space Shuttle mission?
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What is another way of saying "Organization of Petroleum Exporting Countries"?
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