做功的意思就是对物体产生作用并达到一定的效果.
微观上,内能与分子的运动以及相互作用有关.宏观上,内能物体的体积、温度等因素有关.
如果做功改变了物体的体积、温度,自然就会改变物体的内能.
做功的实质,就是对分子产生作用,影响其运动状态和相互作用力.
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