<P> Today, many technological devices convert mechanical energy into other forms of energy or vice versa . These devices can be placed in these categories: </P> <Ul> <Li> An electric motor converts electrical energy into mechanical energy . </Li> <Li> A generator converts mechanical energy into electrical energy . </Li> <Li> A hydroelectric powerplant converts the mechanical energy of water in a storage dam into electrical energy . </Li> <Li> An internal combustion engine is a heat engine that obtains mechanical energy from chemical energy by burning fuel . From this mechanical energy, the internal combustion engine often generates electricity . </Li> <Li> A steam engine converts the heat energy of steam into mechanical energy . </Li> <Li> A turbine converts the kinetic energy of a stream of gas or liquid into mechanical energy . </Li> </Ul> <Li> An electric motor converts electrical energy into mechanical energy . </Li> <Li> A generator converts mechanical energy into electrical energy . </Li>

What modern instrument converts wind to mechanical energy