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Author Question: A ray of light is moving from air into glass. If its angle of incidence is 13, find its angle of ... (Read 89 times) |
An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.
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."
Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.
In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
There are 60,000 miles of blood vessels in every adult human.