Named after Heinrich Hertz and abbreviated as Hz or illustrated as the f symbol, hertz equals one (0.00000000125) cycle per second, measuring the waves or frequencies of electric changes each second. Hertz is commonly used to measure a computer monitor's refresh rate and in computer processors.
Modern dance. The form of dance style known as modern dance is an artistic dance form that allows free movement based on choreography that seeks to provide the audience with a subject and theme. Modern dance performers created this free form style to allow older dancers to continue to dance long after their ballet dance careers ended.
Modern dance, the other major genre of Western theatre dance, developed in the early 20th century as a series of reactions against what detractors saw as the limited, artificial style of movement of ballet and its frivolous subject matter. Perhaps the greatest pioneer in modern dance was Isadora Duncan.