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Author Question: A 500-g firework explodes into two pieces of equal mass at an instant when it is traveling straight ... (Read 524 times) |
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
Illicit drug use costs the United States approximately $181 billion every year.
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.
All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.