Science
What agency maintains the U.S. space program?
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What tool uses a magnetic needle that points north?
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John Glenn was the first American to orbit the earth, in how long a flight?
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Energy return of a radar signal after it has hit the target best fits which science term?
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What space object did some ancient cultures rely on to tell the passage of time?
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The four engines of a Boeing 747 jet produce 188,000 pounds (85,275 kilograms) of what?
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Which of these was one of the original universal elements?
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