It's a pity that the people in front of them are still too hierarchical. The patriarch of the family, Yan Shenggong, doesn't allow it, and they don't dare to talk too much.
Kong Lingyi thought for a long time and finally sighed: "Everyone, please disperse."
He picked up those introductory textbooks and sat at his desk after returning. After flipping through them, he found them quite interesting.
After all, it is for beginners. Li Yu specially added some stories, such as Archimedes discovering the law of buoyancy while taking a bath, Franklin flying a kite, and hitting Newton's apple, etc.; some experiments are also combined with life, and they are all for future generations.
It's familiar, but it's really attractive during this period.
Most of the Confucian classics books at this time were obscure and difficult to understand, and they did not make many simplifications specifically for school children. The writing skills of later generations like Li Yu had great advantages and their communication ability was also strong.
It's just that Kong Lingyi was a little confused when he read the mathematical derivation. The key is that he had no contact with science and had never seen the definitions of triangles, quadrilaterals, or parallel lines.
He picked up a pen and paper and wanted to really study, but was interrupted by Yan Jingyu who came in: "Yan Shenggong, are you really reading Li Yu's book?"
Kong Lingyi said: "I just want to know what Western learning is like, and what kind of magic power can make the imperial court abolish the imperial examination."
Yan Jingyu said: "No matter how thorough the research is, it is of no use. How about sending a memorial to the imperial court? I compiled a letter and sent it to Zhejiang Nanzong and the Confucius Temple in Beijing, and jointly submitted it to them. There are not a few people who can be contacted."
Kong Lingyi looked at the geometric figures he had drawn with a brush and felt that it was indeed too difficult to learn, so he closed the book and said, "Yes, let's try again! You are a doctor of the Five Classics of the Hanlin Academy, and you also write for the Hanlin Academy."
Write a letter to win their support."
Anyway, it is his own thing, so Li Yu will do his duty.
It seems that we really need to leave for Europe. The key is to take advantage of the fact that the Russo-Japanese War has not started yet and the Trans-Siberian Railway is still in use, which can save a lot of time on the round trip.
At first glance, it is a violation of the conservation of angular momentum.
Li Yu bought a lot of film and took a lot of photos.
The altitude of Mount Tai is actually not high. The reason why it appears high is because there are many plains in Shandong. A mountain that is pulled up from the plains will appear very tall.
So the falling cat problem becomes a difficult problem: when you let go, the cat's angular momentum is 0, and there is no external torque, but it can land firmly on all fours, that is, it completes a 180° turn in the air.
Li Yu smiled and said: "What's inappropriate? Don't you want to see Europe? It's the most powerful place in the world at the moment. When the time comes, I can write a travel note and publish it in Ta Kung Pao. It might even cause a sensation."
."
News also came from the United States, first of all, a telegram from Zou Zhou. He regularly reported to Li Yu the situation of the factory, and the current production was very good. In addition, he also said that fifteen radio devices had been sent over, and they were specially designed.
Mr. Silla had made some improvements and told him that he must take a good look at it.
In addition, on the side of "Science", these few issues have been really explosive, and Li Yu has become a super trump card.
After returning to the capital, Fengling told Li Yu that people from Qiluofu Foreign Trade Co., Ltd. in Dongjiaomin Lane had come to see him.
"Dear Mr. Li Yu, on behalf of our company and the Academy of Sciences, I, Carl Siemens, would like to invite you to go to Germany in person. I will set up a research institute, and the chief scientists will be you and Academician Planck to help the two in
For further research on blackbody radiation.”
Li Yu took it over and saw that it was sent from Germany. The senders were Siemens and the Prussian Academy of Sciences.
That is to say, there is a stationary ring that will only rotate when you move it with your hand.
But it is obviously unreliable, because the mass of a cat's tail is too small compared to its body, unless it can spin like a helicopter propeller.
But obviously the cat's tail did not turn into a propeller when it fell.
Lu Bicheng became more interested now: "I want to... think about it again."
The so-called conservation of angular momentum is also very simple to understand. It means that the angular momentum of an object remains unchanged when there is no external torque.
But a few people were in a very good mood and had a steady flow of energy.
Li Yu nodded: "Yes." He suddenly remembered that going by himself was indeed boring, and asked: "Do you want to go together? I also bought a small island in Sweden, which is very beautiful."
But considering the purchasing power, in future generations it would still be possible to buy a SLR at the same price. It seems that the saying "Photography has failed three generations, SLR will ruin a life" was also very appropriate in the early 20th century.
Lu Bicheng asked: "Are we going back to the capital?"
When Li Yu returned home, he sent a telegram to Germany: "Thank you Mr. Siemens for the invitation. I will leave in the near future."
Lu Bicheng was a little shaken and thought: "As a job, it is feasible."
In today's situation, Li Yu was not at a disadvantage, and there was no red-faced and thick-necked argument, so the warrants from Shandong Governor Yang Shixiang and the county magistrate were not used at all.
Li Yu was still a little shocked. The person in front of him was much more beautiful than the photos in history. Although she was not as beautiful as Lin Huiyin, in this era, she was definitely among the top beauties.
Li Yu often played football to exercise, and Lu Bicheng was also in very good physical condition. The two of them supported Yan Fu from time to time, and it took them a long time to finally climb up.
This is really a very honorable thing.
Cats move too fast for the human eye to see clearly, so physicists have been unable to solve this problem for a long time. The solution will have to wait until the emergence of high-speed cameras.
When the two were having fun filming, Fengling came over and said, "Sir, there is a telegram."
Lu Bicheng asked: "On the Seine River, where is that place?"
He should know what happened to Li Yu in the guild hall outside Xuanwumen.
Li Yu knew that the photographic equipment he ordered from Germany had arrived.
Nowadays, Li Yu's game theory has a very great influence in European academic circles. Not only Germany, but also invitations from academies of sciences in several countries are pouring in. The Swedish Academy of Sciences, the Danish Academy of Sciences, the French Academy of Sciences, the Academy of Saint Peter, etc. all want to invite him.
If you stand on an ideal smooth plane with no friction and your head turns to the left, your body will definitely turn in the opposite direction in order to offset this part of the angular momentum.
Yan Fu agreed: "What a great idea! I have never climbed to the top of Dongyue Mountain, so arriving in Shandong today is a rare opportunity."
Lu Bicheng knew English, but did not understand German, and asked: "What is it?"
Li Yu didn't force anything: "Waiting for your news."
Li Yu also understood the principle of punching away with one punch to avoid hundreds of punches, so as to have a quiet environment. Otherwise, if scholars come to the door at every turn, it will be really annoying. Now let Yan Shenggong turn off the fire, and the others
Naturally, it is a misfire.
——
Yan Fu said: "As long as Yan Shenggong doesn't make any more attacks, there should be no more scholars attacking you for a while."
Now "Science" actually receives a lot of manuscripts, and the quality has been improved, so Li Yu does not need to publish major discoveries too intensively, otherwise the tone will be set higher and higher at the beginning, and in the future, if there is a high opening and a low closing
The situation is not easy to handle either.
Moreover, the lens of the camera in front of me is from the famous Zeiss of Germany, so it is worth the money.
Yan Jingyu said: "There is no problem. As long as the imperial examination does not fail, Confucianism will not fail."
Li Yu likes to be in touch with reality and will not write too dry content. This time his starting point is the famous "falling cat problem" that has not yet been solved.
Li Yu said: "We are all here. Mount Tai is not far away. Wouldn't it be beautiful to go and experience the mountains together?"
Yan Fu couldn't help but sigh: "No wonder they are often said to be great rivers and mountains. Such beautiful scenery makes people forget to leave."
Mount Tai is a famous Taoist mountain. The current tourist situation cannot be compared with the situation after the massive investment of later generations: there are no mountain pickers and there are no 18 pans, so the difficulty of climbing is even greater.
The question is very simple, why is it that if you grab a cat's four legs, hang it upside down, and then let go, the cat will always fall to the ground on all fours.
Lu Bicheng's eyes were filled with the word "want to go", but she still said a little reservedly: "Is this...appropriate?"
Lu Bicheng praised: "You really have the demeanor of Zhuge Kongming's tongue-in-cheek battle with the Confucian scholars."
Because this question involves a very important conserved quantity in physics: conservation of angular momentum.
Li Yu said: "There was a telegram from Germany asking me to make a trip."
When solving high school physics problems, we often list several conservation equations, conservation of momentum, conservation of mass, conservation of angular momentum, etc.
The price is very unattractive and ridiculously high, costing more than 500 taels of silver.
Li Yu also felt a little bit, but it was a pity that Shandong would be classified as the sphere of influence of the Japanese after World War I. The lowest period in the history of the Chinese nation still had many ups and downs to overcome.
Although the Association for the Advancement of Science's telegram didn't say it clearly, it still hoped that Li Yu would write another manuscript.
This question may sound far-fetched and inexplicable, because it is a very natural phenomenon, but it has troubled the physics community for hundreds of years.
"Of course it's feasible," Li Yu said. "Going to the romantic Seine River in France may inspire you to write some more excellent poems."
Li Yu immediately told Lu Bicheng that he wanted to take a photo of her.
The key point is that even if we experiment with tailless cats, they can still land on all fours.
"About science?" Lu Bicheng asked again.
Then he smiled and said: "That's almost it. You can change your clothes and continue another day."
Good guy, he actually let him work with Planck.
So this time he planned to write a more relaxed scientific article.
After their tour, they returned to the capital along the same route.
Li Yu said with a smile: "The situation is much better than that of Mr. Kong Ming. After all, Western learning has become the general trend. Facts are better than words. I just need to speak clearly and clearly."
Later, some physicists believed that the opposite rotation of other parts of the body must have offset this part of the angular momentum. Most people thought it was the tail.
Nowadays, there are really few to no women who travel to the West and write travel journals.
Li Yu said: "It is a place where writers and artists gather together."
In addition, some European observatories such as Greenwich also want to invite him to give seminars and lectures on the structure of the spiral arms of the Milky Way and extragalactic galaxies.
Climbing high and looking far away was a very enjoyable thing for the ancients. Because they did not have the opportunity to fly, Yan Fu and Lu Bicheng looked around as much as possible.
Women are women, and they became excited when they heard about taking photos. Lu Bicheng dressed up carefully before looking for him.
It was around 1969 that Stanford University solved this problem at a theoretical level.
In fact, the cat's body first bends in the air, then retracts the front legs, kicks the hind legs, and reduces the amount of rotation of the front part of the body to straighten; after the front part of the body turns straight, then extends the front legs, retracts the hind legs,
Allow the back of the body to straighten.
In short, it is to constantly adjust the rotation amount of different parts of the body to make the overall rotation amount zero.
The whole action happened in a flash of lightning. I have to say that the evolution of nature is really ingenious.
This kind of article is more in line with Li Yu's style, introducing physics into life, and it can also make it more interesting when placed in a magazine.