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Author Question: Exhibit 5-2 A 4.00 kg block is suspended from the roof of an elevator. A 2.00 kg block is suspended ... (Read 5590 times) |
In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).
When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).
Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.