Science
What space object did some ancient cultures rely on to tell the passage of time?
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How far does a car moving at 60 miles per hour cover in one second?
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Where would you find the zone of polarizing activity?
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What does splitting a laser light into two beams through a silver mirror make?
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Which insect is the closest relative to the grasshopper?
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Which of the following books has Carl Sagan not authored?
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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 the following characteristics is the force of gravity dependent on?
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