Science

What electronic device only allows current to flow in one direction?

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How many years are in a sunspot cycle?
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What is a dark area that light does not reach called?
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What specifically is a bezoar called those results from persimmon ingestion?
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Launched in 1995, what was the SOHO spacecraft designed to study?
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Which planet does the moon Deimos belong to?
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Where is the great dark spot located?
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What does ER (of a cell) stand for?
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The Great Red Spot of Jupiter is as wide as how many times as wide as Earth?
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