Science
What is the opposite to ordinary matter called?
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Awarded the Nobel Prize in 1977, John H. Van Vleck's area of expertise is in what?
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What kind of electromagnetic radiation arises only from nuclear excitations?
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What scientist first showed that a changing electric field produces a magnetic field?
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The term, "black hole", was named by American physicist, John Wheeler, in which year?
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What tool uses a magnetic needle that points north?
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