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Perhaps the most powerful aspect of physics is actually the most amazing thing in the universe, which is the universality of physical laws and theories.
Some equations can explain the various phenomena at the edge of the universe, and the unfathomable future of the universe during the initial period of the Big Bang. Let us experience how powerful modern physics is. Gravity Game(2021 hermes bags) Einstein's general theory of relativity is our modern theory of how gravity works: matter and energy bend space-time, and the distortion of space-time reveals how matter moves. Mathematical calculations are a bit complicated. This requires a set of 10 interrelated equations to describe all these bending, deformation and movement phenomena. But these equations involve huge amounts of energy. For example: In the weak gravitational limit, Einstein's equation is simplified to the familiar Newtonian gravitational formula, which can be used to explain the trajectory of everything from throwing baseballs to hydroelectric dams. Outside the surface of the earth, Einstein's equation of relativity It is used to provide accurate positioning of the GPS system and accurately predict the orbits of all planets. These are exactly the same equations, without any modification, continue to present the true principles of more things, revealing the existence and operation of black holes, the growth of the largest structure in the universe, the existence of dark matter in galaxies, and the Big Bang phenomenon. All of these come from a set of 10 equations that span the space and time of the universe. In fact, this indicates that the universe was in a "finite age" at the beginning of the universe. nuclear energy When physicists started cracking the nuclear code in the 1940s, they didn’t know that their tireless efforts would reveal one of the most puzzling mysteries in astronomy: how stars work. Before that, scientists have made various attempts to explain the age of the earth revealed by geology and paleontology, using all known physical methods to explain why the sun keeps high and bright. However, these attempts usually end in failure, and even the best explanation can only last a few million years. But nuclear physics is a brand new game. Once physicists discover the conditions required to ignite nuclear fusion (that is, ultra-high pressure, high temperature, and high density), they will realize that this situation is not always artificial (nuclear bomb And reactor), but exists in the universe and nature: in the core area of the star. The nuclear fusion of hydrogen is the way stars provide energy for billions of years, and physicists use equations to understand the process of transforming nuclear reactions into usable energy, from the smallest atoms to the largest stars. Nuclear physics-relative in physics Newer things combine the universe in a surprising way. law of motion But people don’t have to use profound relativity equations or complex nuclear reaction calculations to discover the universality of physics. It can be as simple and straightforward as a car accident. When two vehicles collide, the law of conservation of energy and momentum can be applied: the total energy and momentum before the collision must be equal to the total energy and momentum after the collision. Through simple statements, investigators can reproduce the accident scene and find out which driver it is If something went wrong, what caused the vehicle collision. Cars are not the only things that collide in the universe. There are star collisions, galaxy mergers, gas cloud mixing, etc. To some extent, few astronomy or physics papers do not mention the conservation of energy and momentum. Scientists use these Principles to understand everything in the universe. Why do gas clouds radiate energy? Why does a neutron star change its speed? How to achieve conservation of energy and momentum. What happens when these galaxies collide? How to follow the conservation of energy and momentum in this case. Next time if you are driving a car into a collision, take a moment to think about how the vehicle follows the conservation of momentum at the moment of the collision, and how the principle is applied in the universe, no matter where you are.
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