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.
The mean age of initiation in 1996 was 16.4 years old, the lowest recorded. 69 Source: 1997 National Household Survey on Drug Abuse Use among youth. The 1998 MTF survey shows that marijuana continues to be the illegal drug most frequently used by young people.Among high school seniors, 49.1 percent reported using marijuana at least once in their lives, a decrease of one-half of a percentage point from 1997.he mean age of initiation in 1996 was 16.4 years old, the lowest recorded. 69 Source: 1997 National Household Survey on Drug Abuse Use among youth. The 1998 MTF survey shows that marijuana continues to be the illegal drug most frequently used by young people.