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 trends remain stable or decline among teens. The 2015 Monitoring the Future survey (MTF) shows decreasing use of a number of substances, including cigarettes, alcohol, prescription opioid pain relievers, and synthetic cannabinoids (âsynthetic marijuanaâ).