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.
The most common drugs abused by teens arenât much different from those of adults. But the reasons for abuse may be different as teens often abuse a substance based on its accessibility. Teens are also more likely to take excessive amounts of drugs and alcohol because of how they perceive the risks and dangers. 1  Alcohol Alcohol is the substance most commonly abused by teens. The social acceptance of drinking among people of legal drinking age can lead many teens to view alcohol as relatively harmless.