Daming: I am the most powerful emperor grandson, please abdicate the throne

Chapter 136 There is a ball under our feet
  "To do better, does it also depend on Annan's factory?"

Zhu Yuanzhang's thoughts returned to industrial transfer.

Zhu Xuan explained: "Not entirely, we still need the theoretical guidance of studying things to achieve knowledge. Sun'er will ask Hou Xian and others to teach the method of studying things to achieve knowledge to all craftsmen, and study weapons together."

Zhu Yuanzhang asked curiously: "How can knowledge obtained by studying things be passed on to craftsmen?"

Those craftsmen are all rough people and can't even read a single word.

The study of things leads to knowledge, but can craftsmen learn from Confucianism?
  But as soon as this idea appeared, Zhu Yuanzhang remembered that it was actually Zhu Xuan who forcibly put these technologies into a shell of studying things to achieve knowledge. Specifically, it had little to do with studying things to achieve knowledge.

The knowledge in the factory has nothing to do with Confucianism.

"of course can!"

Zhu Xuan explained: "Grandpa Huang should have read the article published by his grandson in the Ming Dynasty Daily, about how rainbows are formed, how light has colors, how the sun rises in the east and sets in the west, etc. They are all about studying things to learn, and craftsmen can learn from them. .”

Zhu Yuanzhang said: "We still remember that Guaisun said that the sun rises in the east and sets in the west. The reason is that the position of the sun is fixed. The world we live in is a sphere. The world rotates around the sun, so it rises in the east and sets in the west."

"Grandpa Huang has a really good memory."

Zhu Xuan echoed with a smile.

However, when this issue was brought up, he felt that the next step was to explain the earth and refute the theory that the sky is round and the earth is round.

Sure enough, Zhu Yuanzhang asked this question: "Guaisun, who studies things to achieve knowledge, is wrong. If our earth is a sphere, wouldn't the people on the other side of the earth be about to fall into it?"

Zhu Xuan had no choice but to explain: "My grandson wants to ask Grandpa Huang a question. Why do the things we throw into the air fall to the ground?"

Zhu Song first responded: "We are standing on the ground, things must be falling from above to the ground!"

Zhu Xuan said: "Uncle Twenty, please review the question. My nephew said that it was throwing things into the air with force, including the arrows we shot. If there were no obstacles, why would they fall on the ground in the end instead of going straight up? Shoot forward, or fly straight into the sky?"

Everyone: "..."

This question directly confused them.

It sounds a bit unreasonable, but if you think about it seriously, it is indeed a question worth thinking about.

Take arrows as an example. Why do arrows that are shot end up falling on the ground? Instead of shooting straight forward?

Hou Xian and Zheng He, having received so much physics knowledge from Zhu Xuan, must know how to answer.

But Zhu Yuanzhang and the others had no clue at all.

"May I ask, little emperor grandson, what is the reason?"

Yunqi really couldn't think of it, so he helped them ask this question first.

"I...I think, is our ground sucking things down?"

Xu Miaojin spoke weakly and expressed her inner thoughts.

Zhu Xuan's eyes lit up and he said with a smile: "Sister Miaojin is right. According to my grandson's research on objects, we found that our ground has a force that can attract all our things to the ground. I call this force gravity."

Zhu Song added: "But it's not right either!"

He pointed at the seagulls in the sky and said, "Why aren't these birds sucked down?"

Zhu Xuan continued to explain: "Because birds are relatively light, their wings are very special and can fly against the gravity of the ground, but as long as they fold their wings, they will definitely fall!"

This is indeed true. Zhu Song believes that Zhu Xuan is right.

Yun Qi asked another question, "What about the cotton wool? When the wind blows, it flies up."

Zhu Xuan said: "When the wind stops, what should fall will still fall."

The concept of gravity once again made them think deeply.

It turns out that studying things to gain knowledge can be so interesting. You can discover some things that are common in daily life but don't take it to heart and don't know how to explain them.

"My brother is saying that the ground we are standing on is a sphere or a circle. We will not fall because the earth has a suction force that attracts us to the ground. Is this gravity?" Xu Miaojin expressed his thoughts.

Hearing this, Zhu Xuan, Hou Xian and Zheng He's eyes lit up at the same time.

Unexpectedly, the person who reacted the fastest was Xu Miaojin, who first thought that Zhu Xuan wanted to use gravity to prove that the earth was round.

"how is this possible!"

Zhu Song still didn't believe that they would step on a ball.

This is a super ridiculous thing.

Zhu Yuanzhang asked: "My dear grandson, can you be sure that your check of objects is not wrong?"

Zhu Xuan continued to explain: "My grandson is definitely right. Grandpa Huang, do you see two small islands in front of you?"

He pointed forward.

Zhu Yuanzhang and the others could see that there were two small islands.

"One of the islands was shot by us. It is so close that we can clearly see the entire outline of the island. The other island is farther away and we can only see the tip of the top of the mountain."

"The reason is that our land is a sphere, showing a curvature, and the small island in the distance is just under the curvature relative to us, so only a small mountain tip is exposed."

"Would it be like this if they were all flat?"

Zhu Xuan explained.

Afraid that they wouldn't understand, he asked someone to get paper and pen and draw a simple diagram.

Zhu Yuanzhang looked at the sketch, thoughtfully, and after a while he said: "Sail over and have a look."

Zheng He ordered the helmsman to sail the boat, and they quickly passed the small island that had been shot and sailed towards the island further away. As the distance got closer, the full outline of the island was gradually revealed.

Instead, the island was hit by a cannon, leaving only a hilltop.

Zhu Yuanzhang was shocked when he saw the changes before and after.

Zhu Song was also shocked.

No matter how much I don't want to admit it, I still feel that this is probably reality.

They are stepping on a ball.

Inside the ball, there is gravity!

It's hard to imagine.

“There are so many things that can be discovered through studying things.”

Zhu Yuanzhang sighed: "From this point of view, it is very necessary for you to teach the people in the factory how to study things and how to know them. The prosperity of the Ming Dynasty is indispensable for this knowledge."

Seeing that he could still convince them, Zhu Xuan felt a sense of accomplishment and said, "My grandson will continue to work hard and cultivate a group of special talents for Grandpa Huang."

"This is a new science called studying things to achieve knowledge. We don't think it's very reasonable."

Zhu Yuanzhang believed that these had little to do with Confucianism, but that Sun Guaisun had to put on this shell if he wanted to make it reasonable.

Zhu Xuan said: "That's called science."

"Okay, let's listen to my dear grandson and call it science!"

Zhu Yuanzhang did not ask what science is or why it is called science.

But after going to sea today, he, Zhu Song, and even Yun Qi and others all said that they had gained more knowledge!

Zhu Yuanzhang said again: "Okay, let's go back!"

(End of this chapter)