change
Dunzhe Ling
Basic information: Change is a popular science reading about cosmic physics written by Dunzhe Ling, an independent scholar and popular science writer in China, and it is a popular science model for popularizing advanced theoretical physics. It is deeply loved by the vast number of cosmic physics lovers. It is also a book with realistic inspiration. It took four years to create, and the book has 200,000 words, 52 chapters and 3 10 pages.
Color-changing printing plate of popular science books in Dunzhe Ling physical universe
Excerpted from the preface of the book: There are only two worlds around us: one is the spiritual world and the other is the material world. I was once obsessed with the spiritual world, and as a result, I stumbled and wrote a book "Exploring Life". I don't know what readers think, I'm not satisfied. I don't know if what I reveal is the real brain, but I'm really not satisfied. The color printing version of Dunzhe Ling popular science book Change is available in Taobao, Dunzhe Ling.
The physical world and the cosmic world are both things that need objective description, and there is no room for subjective sand. I hope you can see such objectivity and I hope I can see such beauty. I don't know how long it will take to finish reading, and how many words. I think at least before I learn a lot of knowledge, at least before I am too old to think.
My change will tell me what change is. My change will tell you what the universe is. My "change" always seeks "new change" in change. I hope you wrote New Change, which is much better than mine.
Changing views on popular science;
1, a new definition of inertia: in the gravitational field, the property that an object always maintains its current state of motion is called inertia.
According to the new definition of inertia, Newton's first law should be like this: in the gravitational field, when the external force on an object is zero, the motion that always keeps the current motion state is called inertial motion.
Newton's first law of motion prepared the concept for the following laws, and qualitatively expounded the relationship between force and motion. In particular, the "motion state of an object without external force" mentioned in the first law is different from the motion state of the second law in which the sum of external force vectors is zero (the resultant force is zero), so the first law cannot be regarded as a special case of the second law when F=0, because the acceleration is definitely equal to 0 when f = 0, but the motion with acceleration equal to 0 can only be completely clarified as inertial motion (static or uniform linear motion) by the first law itself. The first law is a completely independent basic law, which solves problems that no other law can solve. The second and third laws can't replace the first law at all.
2. Explain that gravity is the source of inertia. The video is as follows: Gravity is the source of inertia.
There must be something in our universe that knowledge can't reach, but imagination can. Gravitational mass and inertial mass are strictly equal, and the size of inertia is only related to mass. All this points in one direction-gravity is the source of inertia!