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Author Question: A 5.0-kg mass sits on the floor of an elevator that has a downward acceleration of 1.0 m/s2. On top ... (Read 2297 times) |
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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
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In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones
In 1879 an army officer founded the Carlisle School in Pennsylvania to “civilize” young Indians. The