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.
Marijuana use ranks second behind alcohol in regards to the most commonly abused drugs by teenagers. There has been an increase in marijuana use among teenagers due to the increasing societal attitudes towards tolerance and perceptions that marijuana is not a dangerous drug.
Underage Drinking. Alcohol is the most commonly used and abused drug among youth in the United States.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.