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 Maritime University Dalian Maritime University Dalian Maritime University () is a university located in Dalian, Liaoning, People's Republic of China. It is a key maritime institution under the Ministry of Transport of the People's Republic of China, and is a Chinese Ministry of Education Double First Class Discipline University, with Double First Class status in certain disciplines.Known as the "cradle of navigators", the university is the most famous maritime institution of higher learning in China and one of the few maritime institutions in the world "enjoying international reputation" recognized by the international maritime organization. The long history of the University can be