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Author Question: Two cylinders made of the same material roll down a plane inclined at an angle with the horizontal. ... (Read 74 times) |
The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
Medication errors are three times higher among children and infants than with adults.
There are 20 feet of blood vessels in each square inch of human skin.
There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.
More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.