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 Institute of Chemical Physics and the economically viable use of solar and biomass energy. DICP’s other main laboratories include the Laboratory of Instrumentation and Analytical Chemistry, the Laboratory of Fine Chemicals, the State Key Laboratory of Catalysis, the Laboratory of Chemical Lasers, the State Key Laboratory of Molecular Reaction Dynamics, the Laboratory of Aerospace Catalysis and New Materials, and the Laboratory of Biotechnology. Dalian Institute of Chemical Physics The Dalian Institute of Chemical Physics (DICP) (), also called Huàwùsuǒ (), is a research centre of mainly chemical physics, belonging to the Chinese Academy of Sciences. It is located in Dalian, Liaoning Province, China. Having