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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 3743 times) |
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.
In 1864, the first barbiturate (barbituric acid) was synthesized.
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.