Mechanical energy nonconservative forces, like frictional forces, will be present, but often they are of negligible values and the mechanical energy's being constant can therefore be a useful approximation. In elastic collisions, the mechanical energy is conserved but in inelastic collisions, some mechanical energy is converted into heat. The equivalence between lost mechanical energy (dissipation) and an increase in temperature was discovered by James Prescott Joule. Many devices are used to convert mechanical energy to or from other forms of energy, e.g. an electric motor converts electrical energy to mechanical energy, an electric generator converts mechanical energy into electrical energy and a
Dalian University of Foreign Languages Dalian University of Foreign Languages Dalian University of Foreign Languages (DLUFL; ) is a public university in Dalian, Liaoning, China and one of the top foreign language institutes in mainland China. Formerly known as Dalian School of Japanese Language, DLUFL was founded in 1964 with the help of the late Chinese Premier Zhou Enlai. It is now under the administration of the Education Commission of Liaoning Province. Through 40 years of development, DLUFL has fledged into a multi-disciplinary foreign language university which also offers programs in other fields like arts, economics, management, engineering and law. In 2007, the university moves