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一、正确认识能量的转化和守恒自然界中存在各种形式的能量,如机械能、内能、电能、光能、化学能等,这些能都不是孤立的,不同形式的能量在一定条件下会发生转化,如:摩擦生热是机械能转化为内能;水电站发电是机械能转化为电能;电动机通电后转动是电能转化为机械能;发光的电灯是电能转化为光能;植物光合作用是光能转化为化学能等.能量也会在不同的物体间转移,热
First, a correct understanding of energy conversion and conservation There are various forms of energy in nature, such as mechanical energy, internal energy, electrical energy, light energy, chemical energy, etc., these are not isolated, different forms of energy under certain conditions will occur Transformation, such as: friction heat is the mechanical energy into internal energy; hydroelectric power generation is the mechanical energy into electrical energy; electric motor rotation is the electrical energy into mechanical energy; light electric light is converted into light energy; plant photosynthesis is light energy into Chemical energy, etc. Energy will also be transferred between different objects, heat