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 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).