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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,专题25内能核能与能量守恒,1/74,2/74,3/74,定义,存在情况,研究对象,相关原因,改变大小,方法,机械能,物体动能和势能总和,能够为零,宏观物体,质量、速度、高度、弹性形变量,做功,内能,物体内部全部分子做无规则运动动能和分子势能总和,不能为零,自然界中一切物体都有内能,微观粒子,质量、状态、温度等,做功、热传递,4/74,5/74,6/74,7/74,8/74,9/74,10/74,11/74,12/74,13/74,14/74,15/74,16/74,17/74,18/74,19/74,20/74,21/74,22/74,23/74,24/74,25/74,26/74,27/74,28/74,29/74,30/74,31/74,32/74,33/74,34/74,35/74,36/74,37/74,38/74,39/74,40/74,41/74,42/74,43/74,44/74,45/74,46/74,47/74,48/74,49/74,50/74,51/74,52/74,53/74,54/74,55/74,56/74,57/74,58/74,59/74,60/74,61/74,62/74,63/74,64/74,65/74,66/74,67/74,68/74,69/74,70/74,71/74,72/74,73/74,74/74,
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