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.
Alcohol-related motor accidents are the second leading cause of teen death in the United States. The most commonly used illegal drug is marijuana. According to the United Nations 2008 World Drug Report, about 3.9% of the worldâs population between the ages of 15 and 64 abuse marijuana.