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.
In 2006, 2.2 million teens reported nonmedical use of a prescription drug in the past year [23] Nearly 1 in 10 high school seniors reported nonmedical use of Vicodin. About 1 in 20 abuse Oxycontin. Prescription and OTC medications account for 8 of the 14 most frequently abused drugs by high school seniors [24].