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我们身体每时刻都会发出热。问“我们身体含有多少热量”,这个说法是不对的。为什么这样的说法是不对的呢?这就得弄清楚:“什么是内能(热能)?什么是温度?什么是热量?”等问题。物理学表明:内能是指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。一切物体都具有内能,即内能为零的物体并不存在,这是因为任何物体,不管它是否做机械运动,也不管它是否发生弹性形变和相对地面的高度如何,它内部的分子都在做无规则运动,分子间都存在相互作用。
Our body will heat up every moment. Asking “how much calories our body contains” is not correct. Why is this argument wrong? It must be clear: “What is internal energy (heat)? What is temperature? What is heat?” and other issues. Physics shows that internal energy refers to the sum of the kinetic energy and molecular potential energy of all molecules inside the object to do random movement. All objects have internal energy, ie, an object with zero internal energy does not exist. This is because any object, whether or not it undergoes mechanical movement, and whether or not it undergoes elastic deformation and how high relative to the ground, its internal molecules are In doing irregular movements, there are interactions between molecules.