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.
Contemporary dance began at the start of the 20th century when US dancer Isadora Duncan (1878â1927) broke away from ballet and developed her own, more natural style.Contemporary dance has many different styles, some of them closely linked to music, such as jazz, rock and roll, and hip-hop.estern classical dance is called ballet and combines dance with mime (silent acting). It began in Europe in the 15th century. Countries such as India and Thailand also have great classical dance traditions. CHOREOGRAPHY is used to create classical dance.