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.
Alcohol is the most commonly used and abused drug among youth in the United States.1. 1  Excessive drinking is responsible for more than 4,300 deaths among underage youth each year, and cost the U.S. $24 billion in economic costs in 2010.2,3.
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.