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Categories:
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by
Teacher Physics
16 years ago
523
内能
内能是物体所具有的能量形式之一,所有物体都拥有内能。内能与机械能之间存在相互转化的关系。在热量的传递过程中,内能会发生变化,当物体吸收热量时,其内能增加;当物体放出热量时,其内能减少。此外,通过做功,内能也可以转化为机械能或从机械能转化为内能。物体的内能大小与温度密切相关,温度越高,内能越大。通过改变物体的温度,可以有效调节其内能。因此,理解和应用内能的概念对物理学研究和实际生活中的能量转换具有重要意义。
Open
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内能
热量:热传递过程中转移内能的多少
改变
热传递
放出热量,内能减小
吸收热量,内能增大
做功
物体-->外界,内能减小实质:内能-->机械能
外界-->物体,内能增大实质:机械能-->内能
大小:物体的温度
概念
内能与机械能
一切物体有内能
定义