The density of the blade is constant throughout its length, and so a 10%-mass. fragment will have a cross-sectional area of 10% of the full blade. In practice, the. area of a 10%-mass fragment will vary depending upon its shape, and upon whether. it consists of the only the outer shell or the internal beams as well.
Alcohol is the most commonly used and abused drug among youth in the United States.1. 1  Excessive drinking is responsible for more than 4,300 deaths among underage youth each year, and cost the U.S. $24 billion in economic costs in 2010.2,3.
Study: Teens see binge drinking as no big deal. The results revealed that 78 percent of U.S. teens had drank alcohol, and 47 percent of the group said they'd consumed 12 or more drinks in the past year.When it came to drug use, 81 percent of teens said they had the opportunity to use illicit substances, with 42.5 percent actually tried them.tudy: Teens see binge drinking as no big deal. The results revealed that 78 percent of U.S. teens had drank alcohol, and 47 percent of the group said they'd consumed 12 or more drinks in the past year.