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物体的内能是初中物理一个重要的基本概念,学习这一内容,应注意以下几个问题。1 恰当地把握物体内能的概念 通过实验和对物理现象的分析,我们知道物体的内能跟物体的温度和分子间的相互作用情况有关,内能是不同于机械能的另一种形式的能量,对以上内容,可做以下理解: (1)内能是物体内部所有分子做无规则运动的动能和分子势能的总和,而不是单个或少数分子具有的能量。
The internal energy of an object is an important basic concept of junior high school physics. When studying this content, the following issues should be noted. 1 To properly grasp the concept of energy in an object. Through experiments and analysis of physical phenomena, we know that the internal energy of an object is related to the temperature and intermolecular interaction of the object. Internal energy is another form of energy that is different from mechanical energy. For the above, the following can be understood: (1) The internal energy is the sum of the kinetic energy and the molecular potential energy of all the molecules inside the object doing random movement, not the energy of a single or a few molecules.