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.
The first two well-known American dancers to break away from classical ballet were Isadora Duncan and Ruth St. Denis. Although their styles differed, Duncan and St. Denis's unconventional approaches opened the door to a new era in dance history: the American modern dance movement of the 1920s.er modern-dance ballets, beginning with Clytemnestra in 1958, used the free-form techniques of modern dance to present classical literary works. Included in Graham's legacy are several monumental dance scores written for her by composers such as Samuel Barber, Paul Hindemith, and Aaron Copland.