"Please ask, Juzi!"
Li Zexuan heaved a sigh of relief when he heard Mo Huai's affirmative answer. At the same time, he couldn't help but feel shocked. Since Mo Huai said so, didn't it mean that people in this era were really beginning to understand what the universe was? This … this made Li Zexuan feel incredulous!
"The second question, what is force?"
Li Zexuan was shocked, but how could Mo Huai not be? He had read the definition of the universe from Mo Zi's handwritten notes. He thought that this question alone would make Li Zexuan retreat. He didn't expect Li Zexuan, a 14 or 15-year-old kid, to be able to turn the tables. This made Mo Huai very puzzled. After thinking for a while, Mo Huai asked the second question.
"Force? Is it the force of force? "
Li Zexuan suspected that he had heard wrong and asked uncertainly.
Mo Huai nodded and said, "Yes!"
Li Zexuan smiled and answered, "Force is the interaction between several objects. Interaction refers to the movement of an object that changes due to the existence of other objects. Objects only have two attributes — mass and speed. Therefore, force can change the state of motion of an object. If the speed of increase is defined as acceleration, then for the same object, the greater the force it receives, the greater its acceleration will be … "
Li Zexuan talked non-stop about all the knowledge points about force in the 'physics' books of the later generations into words that the ancients could understand. Li Gang, who was listening at the side, was confused, not knowing what the hell Li Zexuan was talking about. Mo Huai, on the other hand, narrowed his eyes and stared at Li Zexuan with an extremely solemn expression. At this moment, it was as if his heart had experienced a violent storm, and he was unable to calm down for a long time.
The ancestor of the Mohist family, Mo Zi, once had a detailed definition of "force" in the "Mohist Classics". He said, "Force is the reason for the movement of an object." In other words, force was the reason for the movement of an object, even if the action of the object's movement was called force. In this regard, he gave an example and said that it was like lifting a heavy object from bottom to top. It could only be done because of the action of force. At the same time, Mo Zi pointed out that when an object was under force, it also produced a reaction force. For example, after two objects of equal mass collided, the two objects would move in opposite directions. If the difference in mass between two objects was great, although the object with greater mass would not move after the collision, the reaction force would still exist.
Then, Mo Zi gave the definitions of "movement" and "stop". He believed that "movement" was due to force pushing, and "stop" was the end of an object's motion after a certain period of time. ... Although Mo Zi didn't clearly point, he realized that the object's motion, after the external force, he realized that the object's state of's motion could not exist forever after the external force disappeared.
To a certain extent, Mo Zi's research in the field of physics and mechanics was definitely more than 2,000 years ahead of the entire world! If the Mohist family could replace the Confucian family and become the orthodox school of physics, then China would very likely become the origin and prosperity of the world's physics!
After a full quarter of an hour, Li Zexuan finally stopped. The two young men, Mo Zhong and Mo Yun, no longer looked at Li Zexuan with contempt. As the core disciples of the Mohist family, they certainly had a certain understanding of Mo Zi's handwritten notes and works. However, they spent most of their time learning martial arts. In comparison, their knowledge in this area was far inferior to Li Zexuan!
Mo Zhong and Mo Yun, who had always flaunted themselves as the children of reclusive masters, felt very hurt in their hearts ~! They couldn't win in terms of martial arts, let alone in terms of knowledge!
Mo Huai closed his eyes and digested what Li Zexuan had just said in his heart, trying to find some loopholes in it. However, after a long while, he opened his eyes somewhat dispiritedly, because he found that what Li Zexuan had just said was not only impeccable, but also more detailed than what was recorded in the ancient books of the Mohist family. He even went a step further in explaining and proving some of the concepts. He had never heard of some of them, but he had to admit that Li Zexuan's words were very reasonable.
"Li Xiannan, you got this question right!"
Mo Huai looked at Li Zexuan with a complicated expression and said.
Although there were rare copies of the "Mohist Classics" circulating in the world, in the social context of Confucianism, how many people in the world would read such an obscure book ~? Moreover, Li Zexuan's theories had clearly surpassed the definition of force in the "Mohist Classics". He had expanded force into a complete and detailed knowledge on the basis of Mohist Classics ~!
Where did Li Zexuan's knowledge come from ~? Why did he know so many things ~? There were many questions buried in Mo Huai's heart, but now was obviously not the time to ask, so he could only endure it.
Li Zexuan smiled slightly. He was really "liking" this Mohist master in front of him more and more now. Where could he find such an advanced physics teacher ~? Li Gang had helped him a lot this time ~!
The person involved, Li Gang, was now dumbfounded ~! He really wanted to ask Mo Huai, how did he get it right ~? He didn't understand at all just now ~!
Mo Huai put his hands behind his back and walked two steps on the spot. Then, he suddenly had a flash of inspiration. He turned to Li Zexuan and asked, "Third question, put a small hole behind an open candle. What is the phenomenon behind the small hole ~?"
With that, he stared at Li Zexuan. Although he knew the answer to this question from the Mohist classics, he only knew how and did not know why. He planned to make things difficult for Li Zexuan later.
Li Zexuan widened his eyes. He now suspected that Mo Huai was a transmigrator. He even knew about the image of a small hole ~? He was going to ascend to the heavens ~!
"What ~? Mr. Li can't answer ~? "
Mo Zhong asked happily when he saw this.
Li Zexuan was shocked and speechless, but in Mo Zhong's eyes, he could not answer.
Li Zexuan came back to his senses and suppressed the shock in his heart. Then, he smiled and said, "It's not difficult ~! There will be an inverted image of a candle flame behind the small hole. As the small hole in the middle moves back and forth, the size of the image will also change. Juzi, am I right? "
As a modern engineering student, although Li Zexuan easily answered Mo Huai's question, he had a stomach full of questions like Mo Huai. This was because the image of a small hole involved the knowledge of geometrical optics. How could the people of the Tang Dynasty know about it ~?
However, he did not know that Mo Huai only saw this knowledge from the Mohist classics. The real person who proposed the image of a small hole was Mozi! Not only did Mozi research in mechanics, but he also had deep attainments in geometrical optics.
…
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