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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 1099 times) |
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.