A water wheel , turned by water flowing over a weir , furnishes a good example of potential energy being turned into useful mechanical energy 由流水过坝转动的水轮提供一个说明位能正在转变成有用的机械能的例子。
Because energy can be changed from one form into another , electricity can be changed into heat energy , mechanical energy , light energy , etc 能量能从一种形式转换为另一种形式，所以电可以转变为热能、机械能、光能等等。
Energy is all around us , simply as heat and light , and in more complex mechanical , electrical , chemical and nuclear forms 能源可谓无处不在，简单的如热能和光能，到更复杂的机械能、电能、化学能及核能等都与我们息息相关。
The fifth is starting system and its purpose is to change the electrical current into the mechanical energy to push the crank - shaft around 发动机的第四个系统是起动系统，起动系统的作用是把电能转变为机械能推动曲轴转动。
The starter motor then converts this energy into mechanical energy , which is transmitted through the drive mechanism to the engine ' s fly - wheel 起动机把来自蓄电池的电能转化为机械能,然后再通过传动机构把机械能传递给发动机飞轮
During hydrolization of atp , conformational changes occur within the motor protein ( a mechanochemical process ) , and mechanical work is done 分子马达通过催化三磷酸腺苷分子( atp )水解，将化学能转化为机械能产生自身的定向运动。
The heat generated in coal combustion transforms water into steam , which turns a steam turbine , whose mechanical energy is converted to electricity by a generator 煤燃烧产生的热把水变成蒸汽，使蒸汽涡轮机运转，产生的机械能再透过发电机转换成电。
Molecular motors with atp as their " fuel " , which effectively and directly convert chemical energy into mechanical energy and move directionally 分子马达是一种以atp为“燃料”的分子机器，可高效地将atp水解释放的化学能转化为机械能，产生协调的定向运动而做功。
