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.
Drug use is most common among young adults who are 18 to 25 years old. Rates of current (past month) use of illicit drugs in 2015 were higher for young adults aged 18 to 25 (22.3 percent) than for youths aged 12 to 17 (8.8 percent) and adults aged 26 or older (8.2 percent).