Science
What scientist first showed that a changing electric field produces a magnetic field?
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What is the opening of a lens, which controls the amount of light?
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What specifically is a bezoar called those results from persimmon ingestion?
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Halley's Comet is predicted to appear again in which year?
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Which substance will have the highest increase in temperature for the same amount of heat?
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How long does it take for Saturn to rotate completely on its axis (a typical day)?
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