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
Song Instead of a Kiss it to Robert Plant to see if he could duet with her on the song, a move she was furious about. Alannah has cited that it is one of her favourite songs from her catalogue. The song was chosen as the lead single from the "Rockinghorse" album. While Alannah liked the song and found it single-worthy, she was adamant about releasing the uptempo rocker "Our World, Our Times" instead of a ballad as the first single, but was overruled by the record company because they feared the political lyrics of that song would hurt its airplay and chart performance. The