Science
What must occur for electricity to flow?
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The term, "black hole", was named by American physicist, John Wheeler, in which year?
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Which of the following terms is not related to thermodynamics?
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What is it called when the Earth, Sun and Moon lie in a straight-line configuration?
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Mariner IV sent the first pictures of which planet back to earth?
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What is the term for the capacity of a body or system to do work?
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What is any picture of an object made with a mirror or lens called?
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What kind of electromagnetic radiation arises only from nuclear excitations?
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