我们使用手机、电脑,需要能量;要想开动汽车、飞机、轮船等交通工具,需要能量.运转的发电机产生电能;电灯发光,产生了光能和内能;燃料燃烧产生了内能:物体做机械运动具有了机械能等.人们利用能量的过程实际上就是能量转移或转化的过程,例如生火做饭,就是把燃料的化学能转化为内能,再通过热传递即能量的转移,使食物变熟.能量在日常生活中对我们来说是必不可少的. We use cell phones and computers and need energy. We need energy to get traffic on cars, airplanes and ships, etc. The running generator produces electricity, the lamp glows to produce light and internal energy, and the fuel burns to produce internal energy: Mechanical movement has mechanical energy, etc. People use energy process is actually the process of energy transfer or conversion, such as cooking, that is, the chemical energy of the fuel into internal energy, and then through heat transfer that energy transfer, so that food Become mature. Energy is essential for us in everyday life.