Li Yu specially selected some textbooks from the Capital University this time, mainly about mechanical principles and mathematical principles, and also related to mechanical drawing.
These things are not complicated for Li Yu, and it can even be said that he is familiar with them. The content of the textbook is still very detailed, but for the Beiyang Army crash course, it does not need to be too complicated.
Outside the school, Li Chun had been waiting for him with a group of students. Li Chun said excitedly: "Thank you for coming, sir! As per the previous arrangement, you will continue to teach the surveying and mapping department. We will add an extra hour and a half of classes every day for you to attend, and you will decide the specific teaching content." Every day The course is only one and a half hours long, so it’s not tiring.
Li Yu said: "I am ready to teach and will not let the school down." Li Chun said: "That's great! They can't wait!" Many students from the Surveying and Mapping Department came to the classroom surrounded by Li Yu.
"Professor Li, you were so handsome at the demonstration meeting!" Wu Peifu said with admiration. Sun Chuanfang also said: "Yes, I never thought that learning can be so useful! So majestic!" Li Jinglin said: "Professor Li, I only now understand the surveying and mapping and basic ballistics you taught before. This time you must Speak more slowly." Cai Yubiao said: "Mr. Li, you must teach us well, and I will be like you in the future!" Li Yu said with a smile: "No matter what profession you are in, you must have the most basic scientific literacy. They are all necessary. But learning is not easy, and once you leave school, you will not have such good conditions for learning, let alone so much time." Li Yu directly quoted what his teacher said when he was in school, I didn’t expect to really understand it until now.
Being able to switch between the two identities of teacher and student at will, and jump left and right, I am afraid Li Yu was also the first person in the late Qing Dynasty and the early Republic of China.
Li Yu still uses his blackboard writing to give lectures. After all, there was no time to print the textbooks. Even if they were printed, the thick university textbooks would not be suitable for the Beiyang Military Preparation Crash Course.
The students in the crash course are soldiers after all, they just need to understand the basic principles. So it's not so much a lecture, but more of a science popularization.
The difficulty of the lectures is definitely not that high. The key is that the fun should be reflected and the principles should be explained.
Fortunately, there is someone like Wu Peifu
A "good student", he will take notes carefully and then pass them on to other students. In addition to lecturing every day, Li Yu still has a lot of time.
Recently, he was going to write something more and publish it. Influenced by John's incident, he was going to start using thermodynamics again.
After all, thermodynamics is still very popular now, but by the time Li Yu went to school, thermodynamics was already an obscure field.
If you want to move, move big! What Li Yu is planning to write is the third law of thermodynamics that has not yet been proposed.
Although in the eyes of later generations, the status of the third law of thermodynamics is really too weak compared with the first law and the second law.
The first law of thermodynamics talks about the conservation of energy, which is the most basic physical concept. The second law of thermodynamics is even more powerful. When extended, it becomes a super invincible worldview. It can almost be regarded as one of the best arguments for materialism to defeat idealism.
But the third law is poorly understood. However, it is still a basic law of thermodynamics. It may not be considered a big deal in later generations, but at the beginning of the 20th century, it was definitely a blockbuster.
Like previous papers on fractals and chaos, the principle of entropy increase, and x-rays, many predecessors have actually done research on the third law of thermodynamics.
Regarding the problem of molecular motion rate, there is already a Maxwell-Boltzmann distribution. A hundred years ago, Charles and Gay-Lussac also calculated the approximate value of absolute zero through the function graph of pressure and temperature. Although it was not accurate yet, it was not easy.
Fifty years ago, when Lord Kelvin established the thermal temperature scale, he re-proposed absolute zero as the lower limit of temperature.
The foundation is already in place, and the third law of thermodynamics has been waiting for us for a long time. Li Yu is good at theoretical physics, so what he is good at is physical derivation.
In fact, historically, the third law of thermodynamics was initially just an empirical law, and only later had its mathematical derivation.
But now Li Yu has deduced it in advance based on the results of his predecessors. Reverse this order.
But the impact is not big. After all, the subsequent development of the third law of thermodynamics will take a long time, and many people will conduct experiments.
Li Yu is not unfamiliar with the third law of thermodynamics, nor is it particularly complicated. Its expressions are the same as the second law, and there are many. To put it simply, it is impossible to reach absolute zero.
However, Li Yuwen naturally used the perspective of atomic theory and the concept of entropy to demonstrate. The whole paper is not very long, it can be fully explained in just a few dozen pages.
After all, considering the current development of physics, he cannot be comprehensive. But this is still not simple. Many years later, Nernst conducted many experiments through experiments to verify Li Yu's point of view.
The third law of thermodynamics may even be called the Nernst-Lee law. So looking at it now, this article is still very valuable, and Li Yu can finally bear the name of the Capital University.
Shine a wave! Of course, this matter still takes some time to do. Li Yu first wrote the manuscript requested by Ying Lianzhi, the founder of "Ta Kung Pao" that day.
After the manuscript was written, Li Chunzhao came over to find Li Yu and found that he was immersed in writing, so he said: "You seem to be very busy." Li Yu said: "Time is precious, every inch is precious, and a waste of time is a waste." Money." Li Chun gave a thumbs up: "I can't understand the numbers you wrote. But since you love learning so much, there are a few things that are the most convenient to learn in Beiyang. I think you will be interested. "Li Yu asked: "What?" Li Chun said proudly: "Riding and shooting." Li Yu said in surprise: "Riding? Shooting?" Li Chun clapped his fingers and said: "Yes, although I am not very knowledgeable, but I have never heard of the six arts mentioned by the ancients, etiquette, music, archery, charioteering, calligraphy, and numeracy. In total, you are already very good at numeracy among them, but if you want to learn archery and charioteer, I'm afraid you won't. Where is more suitable than our Beiyang. How about it, do you want to learn?" Li Yu thought about it in his mind, and what he said made sense!
When it is said to be 'shooting', it is definitely not archery now, but shooting. In his previous life, he had only fired three rounds while attending military summer camp.
The rifle was placed on the ground and covered with a mat. The officer sitting next to him took a magazine with three bullets in his hand. He lay on the ground and the instructor loaded the magazine, and then he fired randomly.
I couldn't see the target ten meters away, and I didn't know where I was hitting it. Other than that, I may have played many FPS games.
Thinking about the troubled times ahead, it seems that there is nothing wrong with learning to shoot. Such a good opportunity cannot be missed.
——Although you will definitely not be able to practice marksmanship in a short period of time, you can at least learn how to use the gun first. As for
The horseback riding referred to by "royal" is more practical, and it can be regarded as driving a car today! Anyway, I have a little savings now, so it would be quite fun to buy a horse and ride a horse occasionally.
I couldn't own a BMW in my previous life, but I can own a real BMW in this life!
