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Author Question: Two identical 7-kg bowling balls roll toward each other. The one on the left is moving at +4 m/s ... (Read 12 times) |
Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.
Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.