1º_ It is a consonant that in Spanish is only used in the digraph /qu/ and always before /e/ or /i/. As a curiosity, its name 'cu' does not include the letter /q/, and is one of the few instances in the alphabet. 2º_ 'Q' represents the amino acid glutamine; the amount of heat in thermodynamics; the mathematical set of real numbers; It is also a symbol equivalent to the prefix Quetta- . 3º_ 'q' in physics represents an electric charge; It is also a symbol equivalent to the prefix quecto- .
In addition to the eighteenth letter in our alphabet, is a novel by Luther Blissett 4 Italian writers collective pseudonym: Roberto Bui, Giovanni Cattabriga, Federico Guglielmi and Luca di Meo. It traces the journey of an Anabaptist radical of the 16th century by the turbulent Central Europe of reform, pursued by Q, a spy of Cardinal Giovanni Pietro Carafa. He took part in the war of the peasants of Thomas Müntzer and in the Münster rebellion.
