level 3
质量是什么？质量是所含物质粒子的数量的多少。从中可见其与运动无关联。但是，对于改变不同质量的物质所需要的的能量不同。与之相关的是，小质量高速度物质的改变与大质量低速度物质的改变，在被相同的能量作用，有可能会消耗相同的能量。这种状况被某些观点误认为是“速度增加转变成了质量”。其实这种误会是源自于不了解“运动和物质”的定义。
2016年03月22日 07点03分
level 6
level 12
这取决于你的“质量”的定义。另外，如果你考虑一个封闭系统，其中组成部分的动能的确体现为系统的质量。换句话说，一杯水被加热后理论上质量大于被加热前。
2016年03月22日 14点03分
13
为什么呢？
2016年03月23日 11点03分
@wolfking97 你说“具有更大的动能，所以E增大”我信，可是若用超级弹弓加速一粒钢丸，其质量 m 会怎么增大的呢？
2016年03月24日 08点03分
@明月何时有788 这取决于你的“质量”的定义。如果用前面我给出的质能方程，那么质量是个不变量，加速过程中不质量不改变。
2016年03月24日 14点03分
level 1
按着相对论的质速方程来说，物体的速度增加，质量就会增加，这一点，已被实验所证实，比如，回旋加速器中的电子，它的速度接近光速时，质量就几十倍上百倍的增加，它的运动轨迹，完全符合质量增加后的数据，与相对论的计算结果，完全相符。
2016年03月23日 11点03分
14
level 11
level 1
Calculus is the code to open the universe, and mechanics is the key to open the door to the universe, so the system model theory is to understand the pattern of the universe. The reason why the world is so wonderful, beautiful and long-lasting is precisely because of his system model construction. The universe model based on the system model must be the most natural, beautiful, and intelligent model in the universe. God created the world based on a system. Our world is a system. Everything in the world is a system. Without a system, there would be no world. The construction of a system model is how God created the world.
In fact, whether in the East or the West, there are a lot of statements and records about system construction in ancient philosophy, medicine and other fields. For example, the western philosopher Aristotle once said that the sum of individuals is greater than the sum of individuals; for example, the theories of the human body microcosm in the beauty of Buddhism, such as the theory of Tiandao in the Chinese Tao Te Ching, etc., are all about system construction. . In the modern field, there are also many researchers doing systematic research. For example, Bertrand of Sweden and Qian Xuesen, the father of nuclear physics in China, are more representative. In particular, the introduction of system theory, information theory, and cybernetics have allowed people to focus only on the system itself, and made the study of system model construction a completely new topic. So my research theory may not be paid attention to, there is great possibility and rationality. But this is exactly the important mission of the article written by me and deeply requires the society and human beings to pay attention to the theory of system model construction.
2021年07月31日 07点07分
17
In fact, whether in the East or the West, there are a lot of statements and records about system construction in ancient philosophy, medicine and other fields. For example, the western philosopher Aristotle once said that the sum of individuals is greater than the sum of individuals; for example, the theories of the human body microcosm in the beauty of Buddhism, such as the theory of Tiandao in the Chinese Tao Te Ching, etc., are all about system construction. . In the modern field, there are also many researchers doing systematic research. For example, Bertrand of Sweden and Qian Xuesen, the father of nuclear physics in China, are more representative. In particular, the introduction of system theory, information theory, and cybernetics have allowed people to focus only on the system itself, and made the study of system model construction a completely new topic. So my research theory may not be paid attention to, there is great possibility and rationality. But this is exactly the important mission of the article written by me and deeply requires the society and human beings to pay attention to the theory of system model construction.