Two or more pure substances can be mixed together to form a mixture. An example of a mixture of two compounds is alcohol and water. An example of a mixture of elements and compounds is air. The major components of air are hydrogen, oxygen, nitrogen and carbon dioxide. The substances in a mixture can be separated physically via such methods as filtration or chromatography.
Enigma is a German musical project founded in 1990 by Romanian-German musician and producer Michael Cretu. Cretu had released several solo records, collaborated with various artists, and produced albums for his then wife, German pop singer Sandra, before he conceived the idea of a New Age, Worldbeat project.
An Enigma machine was a series of electro-mechanical rotor cipher machines developed and used in the early to mid twentieth century for commercial and military usage.ike other rotor machines, the Enigma machine is a combination of mechanical and electrical subsystems. The mechanical subsystem consists of a keyboard; a set of rotating disks called rotors arranged adjacently along a spindle; and one of various stepping components to turn at least one rotor with each key press.