A simple example of a polarized transverse wave is vibrations traveling along a taut string (see image); for example, in a musical instrument like a guitar string. Depending on how the string is plucked, the vibrations can be in a vertical direction, horizontal direction, or at any angle perpendicular to the string.
Commission on Narcotic Drugs considers future of drug control. 14 March 2008 - The 51 st session of the annual Commission on Narcotic Drugs (CND) wrapped up today.
These drugs include morphine and codeine. Opioids are artificial substances that have the same effect as morphine or codeine. The term narcotic refers to either type of drug. Narcotics are powerful painkillers that cause drowsiness (sedation) and, sometimes, feelings of euphoria. These drugs include: 1  Codeine. 2  Heroin. 3  Hydromorphone (Dilaudid). 4  Methadone. 5  Meperidine (Demerol).