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Author Question: In a visual binary system with circular orbits, if in 20 years the two stars' position angles have ... (Read 94 times) |
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.