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.
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).