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Author Question: On a variable speed drive: A) Spindle speeds changes are done with the spindle running B) The ... (Read 70 times) |
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.