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.
1 The most commonly abused prescription drugs are pain medications, sleeping pills, anti-anxiety medications and stimulants (used to treat attention deficit/hyperactivity disorders). 2  1. 3  Almost 1 in every 4 teens in America say they have misused or abused a prescription drug. 12-17 year olds abuse prescription drugs more than ecstasy, heroin, crack/cocaine and methamphetamines combined. 1. 2  Two-thirds of people 12 and older (68%) who have abused prescription pain relievers within the past year say they got them from a friend or relative.