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一卷 一、填空题(共40分,每空2分) 1.一个物体静止时,没有动能,但它具有内能,这是因为物体的内能和物体内部___情况有关。 2.改变物体内能的方式有___,它们的区别是:(1)______;(2)___________。 3.汽油的燃烧值为4.6×10~7焦/千克,它所表示的物理意义是___。5千克的汽油完全燃烧所放出的热量是___。 4.能的转化和守恒定律的内容是______。 5.物体能被压缩的原因是______。
A roll First, fill in the blank (a total of 40 points, 2 points per empty) 1. An object is stationary, there is no kinetic energy, but it has internal energy, this is because the internal energy of the object and the internal situation of the object. 2. There are ___ ways to change the internal energy of an object. The difference is: (1) ______; (2) ___________. 3. The combustion value of gasoline is 4.6×10~7 J/kg, and its physical meaning is ___. The heat released when 5 kilograms of gasoline is completely burned is ___. 4. The content of the law of energy conversion and conservation is ______. 5. The reason why an object can be compressed is ______.