"Excuse me, boss~!"
When Li Zexuan heard Mo Huai's affirmative words, he couldn't help but breathed a sigh of relief. At the same time, he couldn't help being shocked. Since Mo Huai said this, doesn't it prove that in this era, some people really have begun to realize what the universe is. This... This makes Li Zexuan feel incredible~!
"The second question, what is force~?"
Li Zexuan was shocked, so how could Mo Huai not be shocked~? Regarding the definition of the universe, he saw it from Mozi's handwritten notes. He originally thought that this question alone would make Li Zexuan quit. Unexpectedly, Li Zexuan, a little boy in his 14th and fifth year, could actually complete the game. The counterattack made Mo Huai very puzzled. After thinking for a long time, Mo Huai asked his second question.
"Power~? Is it the power of strength~?"
Li Zexuan suspected that he heard wrongly and asked with some uncertainty.
Mo Huai nodded and said, "Yeah~!"
Li Zexuan smiled, and he answered immediately: "Force is the interaction between several objects. Interaction means that the motion of an object will change due to the presence of other objects, and objects have only two attributes-mass and speed, so Force can change the motion state of an object. If the speed of increase in speed is defined by acceleration, then the greater the force on the same object, the greater its acceleration..."
Li Zexuan eloquently translated all the knowledge points about force in later generations of "Physics" books into words that ancient people could understand. Li Gang listened in confusion and had no idea what the hell Li Zexuan was talking about, while Mo Huai's pupils shrank, and he stared at Li Zexuan with a very solemn expression. At this moment, his heart felt as if he had experienced a violent storm, and he could not calm down for a long time.
Mozi, the founder of Mohism, once gave a detailed definition of "force" in the "Mo Jing", saying: "Force is the reason why punishment (form) is exciting." In other words, force is what makes objects move, even if The action of an object's motion is called force. He gave an example to illustrate this, saying that it is like lifting a heavy object from bottom to top, which can only be done due to the force of force. At the same time, Mozi pointed out that when an object is subjected to force, it also produces a reaction force. For example, when two objects of equal mass collide, the two objects will move in opposite directions. If the masses of two objects are very different, although the object with the larger mass will not move after the collision, the reaction force will still exist.
Then, Mozi gave the definitions of "moving" and "stopping". He believes that "movement" is due to force pushing, and "stop" is the end of the object's motion state after a certain period of time. Although Mozi did not clearly point out that the end of the state of motion was due to the existence of resistance, he had realized that after the external force disappears, the state of motion of an object cannot exist forever.
To a certain extent, Mozi's research in the field of physical mechanics was definitely more than two thousand years ahead of the entire world~! If Mohism could replace Confucianism and become orthodox, then China would very likely become the origin and prosperity of world physics~!
After talking for a full quarter of an hour, Li Zexuan finally stopped. The two young men, Mo Zhong and Mo Yun, looked at Li Zexuan without their previous contempt. As core disciples of the Mo family, they had no respect for Mo Zi's notes and writings. Of course they have a certain understanding, but they spend most of their time learning martial arts. In comparison, their knowledge reserve in this area is far inferior to Li Zexuan~!
They couldn't beat them in terms of force, and they were even more incomparable in terms of knowledge. This made Mo Zhong and Mo Yun, who had always regarded themselves as the disciples of hermit masters, very hurt~!
Mo Huai closed his eyes, mentally digesting what Li Zexuan just said, trying to find some loopholes in it. But after a while, he opened his eyes with some dejection, because he found that what Li Zexuan just said was not only impeccable, but also It was more detailed than what was recorded in Mohist classics, and even further elaborated and proved some aspects. Some concepts he had never heard of himself, but he had to admit that what Li Zexuan said made sense.
"Li County man, you answered this question correctly~!"
Mo Huai looked at Li Zexuan with a complicated expression and said.
Although there are rare copies of the "Mo Jing" circulating in the world, in a social context where Confucianism is very popular, how many people in the world will read such unorthodox books~? Moreover, the theories mentioned by Li Zexuan are obviously beyond the definition of force in the "Mo Jing". Based on Mozi, he expanded force into a complete and detailed knowledge~!
Where did Li Zexuan's knowledge come from? Why does he know so many things~? There were many questions buried in Mo Huai's heart, but now was obviously not the time to ask questions, so he could only endure it.
Li Zexuan smiled slightly. He really "liked" the Mohist giant in front of him more and more now. Where could he find such a physics teacher with advanced ideas~! Li Gang helped him a lot this time~!
The person involved, Li Gang, is confused now~! He wanted to ask Mo Huai how he got the answer right~? He didn't understand it at all just now~!
Mo Huai clasped his hands behind his back and walked two steps on the spot. Then he suddenly had a flash of inspiration and turned to Li Zexuan and asked: "The third question is about an open flame candle. If a small hole is placed behind it, what will happen behind the small hole~?" "
After that, he looked at Li Zexuan intently. Although he knew the answer to this question from the Mohist classics, he only knew the answer but did not know the reason. He planned to embarrass Li Zexuan later.
Li Zexuan's eyes widened. Now he was doubting whether this Mo Huai was a time traveler. Even the small hole image knew about it~? This is going to God~!
"What~? Li County man can't answer~?"
Seeing this, Mo Zhong asked happily.
Li Zexuan was shocked and speechless, but in Mo Zhong's eyes, he couldn't answer.
Li Zexuan came back to his senses, suppressed the shock in his heart, and then smiled: "What's so difficult about this~! There will be an inverted image of a candle flame behind the small hole, and as the small hole in the middle moves back and forth, the size of the image will also change. There has been a change. Juzi, am I right or not?"
As a modern engineering student, although Li Zexuan easily answered Mo Huai's question, he also had a lot of questions in his mind like Mo Huai, because small hole imaging involves knowledge of geometric optics. People in the Tang Dynasty How could you possibly know~?
Little did he know that Mo Huai only read this knowledge from Mohist classics. The real proposer of small hole imaging was Mozi! Mozi not only conducted research in mechanics, but also had profound attainments in geometric optics.
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