"Master Su, was it successful?"
Zhu Biao ran over and asked excitedly.
Su Jing nodded and said: "Yes, it was successful."
The strength of this high carbon steel is much stronger than that of normal cast iron.
Zhu Biao took the steel pipe from Su Jing's hand. He could clearly see the explosion just now.
The previous test firing of the gun was almost equivalent to exploding the barrel.
But now this steel pipe has not changed much. It is obviously about the same thickness.
"Master Su, how did you do it?"
Zhu Biao asked curiously.
Su Jing picked up a handful of black graphite clay and said, "It's very simple, this is it."
"Mo Ni?"
Zhu Biao was confused. Although he knew before that Su Jing was looking for graphite ore in order to refine higher-strength iron, he still didn't know the specific principle.
Su Jing said with a smile: "Yes, the main component of graphite is carbon. During the iron-making process, adding carbon can increase its strength."
"But the specific ratio needs to be tested carefully as a teacher."
Su Jing did not stop there. Although the explosion experiment just now was successful, there was still a problem with the steel pipe.
High carbon steel has high strength, but its shock resistance is slightly poor.
During the use of firearms, the explosion will produce violent vibrations.
So, this is just the beginning.
"Student understand, then Master Su will stay in Laizhou Mansion for a while."
Zhu Biao said.
Su Jing nodded and said: "Yes, looking at the situation, I probably won't be able to make it back in time for this year's New Year."
Heavy snow has begun to fall, and the temperature continues to drop.
At this time, it is barely possible to go back on the road, but in a few days, the horses may not be able to walk on the road.
So Su Jing's plan was to spend the winter in Laizhou Prefecture.
I'll go back next spring when the weather gets warmer.
Anyway, I returned to Lishui County for the Chinese New Year, so there was no need to take risks.
In her last life, Su Jing spent the winter in Shandong, and it was always cold.
If I had to drive back in a carriage, I would probably freeze to death on the way.
If a gentleman does not stand under a dangerous wall, the worst he can do is come back next year.
Zhu Biao was silent for a moment. Su Jing glanced at Zhu Biao and said, "What, are you homesick?"
Zhu Biao shook his head and said: "No, if I can be with Master Su, it will be the same wherever I celebrate the New Year."
Su Jing smiled and said, "When spring comes next year, you can stay at home for a while."
Zhu Biao has been following him for quite a long time.
However, after hearing Su Jing's words, Zhu Biao's expression suddenly changed.
"Master Su, are you not teaching students?"
Zhu Biao asked nervously.
"Um?"
Su Jing looked at Zhu Biao in surprise and said, "Niu Yi, what are you thinking about? I still have a lot to teach you as a teacher."
"Not much to say, another three years of study is not too much."
The content of the nine-year compulsory education alone, if Su Jing simplifies the teaching, will last almost three years.
Zhu Biao's talent is not as exaggerated as Zhu Xi's, but it's not bad either.
Su Jing didn't want to end her teaching in half a year.
This is to cultivate the scientific buds of Ming Dynasty, and it is a very important responsibility.
"Master Su is so humble. Students will definitely not be able to finish their studies in three years."
Zhu Biao's face showed joy.
"Okay, you haven't written a letter to your family since you've been here for a few days, so hurry up and write one to say you're safe. In a few years, I'm afraid the letter won't get out."
Su Jing touched Zhu Biao's head and said.
Su Jing is alone, so it doesn't matter.
However, Zhu Biao can no longer go home to celebrate the New Year, so he still needs to report that he is safe.
"Well, Master Su, students will write now."
Zhu Biao nodded immediately, turned back to the room and started writing a letter.
Zhu Biao kept records of everything in Qingzhou Prefecture, even more detailed than Jia Shaozu.
Zhu Biao naturally wanted to write down everything, as well as the progress and success of Su Jing's experiment with new steelmaking methods.
As for the soap, Zhu Biao wrote down the production method and uses. Because the production was very simple, he didn’t bring the actual soap.
The most important thing is the content of materialist dialectics that Zhu Biao has at hand at this moment.
These days, Su Jing is making steel all day long, while Zhu Biao is thinking about materialist dialectics.
For him, this thing is a little too profound.
No, it should be said that in the context of this feudal dynasty, these things are too advanced.
Su Jing herself instilled her own understanding into Zhu Biao with little knowledge.
It has already been diluted once.
Zhu Biao's self-understanding was diluted again.
He hesitated for a while and decided not to write these contents in the letter for the time being.
After all, he himself didn't even know a little bit about these things.
Zhu Biao took a full hour to write this letter.
As for delivering the letter, Zhu Yuanzhang knew Su Jing's destination, and someone from Laizhou Prefecture had already responded.
At this moment, among the troops stationed in Laizhou Prefecture, Mu Ying has been teaching the Yuanyang Formation for several days.
As Zhu Yuanzhang's adopted son, Mu Ying has been training in the army, and is also well known to many soldiers.
"The usage of this wolf constitution is to avoid fighting alone. The formation is very important and must not be messed up."
Mu Ying held the Wolf Constitution in her hand, set up the formation, and demonstrated and explained to the surrounding sergeants.
The sergeants also studied very seriously, because they knew that this was to fight against Japanese pirates.
If you do this, you may pay the price with your life next year.
Even though it was freezing cold, no one complained.
The army in the early days of the Ming Dynasty was quite good in every aspect.
The snow is falling one after another, and winter is finally here.
In the small courtyard, Su Jing rarely made steel.
Because he has already refined steel with various carbon contents and has the data.
Here, he did not intend to directly make firecrackers.
The main reason is that I will go back in the spring next year, so there is no need to buy so many equipment.
Moreover, the yard I rented here has been tested and exploded continuously, and it has been inspected by the army several times.
That is to say, the Chinese New Year is coming soon, and there are a lot of firecrackers. Although there is a lot of movement on Su Jing's side, it does not cause any danger.
"It's freezing cold today. It's so cold!"
Su Jing put on the cloak that Queen Ma gave him, which was actually the old cloak that Zhu Yuanzhang used before.
Even though it looks like an old cloak, Queen Ma has mended it very carefully, and the cotton inside is also filled with new ones, so it has a very good protection against the cold.
Wrapped in a cloak, it obviously doesn't feel so cold anymore.
Zhu Biao also put on warm clothes and accompanied Su Jing to light the stove at the door.
"Auspicious snow heralds a good harvest, which is a good sign."
Zhu Biao looked at the falling snow, his face full of joy.
If the people are good, Zhu Biao will be happy.
Su Jing smiled and said: "Everyone knows that auspicious snow heralds a good harvest. So Niu Yi, do you know why after auspicious snow there can be a good harvest?"
For the common people, auspicious snow and good harvest are two related phenomena.
After summarizing, I got the proverb that auspicious snow heralds a good harvest.
But the deep connection among them is not so clear to the people.
Zhu Biao thought for a while and said: "Because the heavy snow freezes the pests and diseases to death, and the snow is also water. After it melts in spring, it irrigates the soil."
Having studied with Su Jing for a long time, Zhu Biao's answer is more inclined to a scientific explanation.
"That makes sense, but the snow also plays a crucial role that you didn't mention."
Su Jing said lightly.
The crucial role of heavy snow?
This made Zhu Biao confused. Wasn't he talking about an important role?
"If the students don't understand, please ask Teacher Su for guidance."
Zhu Biao asked humbly.
Su Jing smiled and said: "It's actually very simple, because heavy snow can keep people warm. Soil temperature is very important in planting. If frozen soil forms, it will be difficult for crops to grow."
Keep warm in heavy snow?
Listening to Su Jing's words, Zhu Biao felt very surprised.
Snow is something that only exists in winter, and it is a concept that is bound to cold.
How can snow keep you warm?
"Master Su, the student doesn't understand."
Zhu Biao shook his head and said.
Zhu Biao didn't know this aspect of physics knowledge, and Su Jing didn't mention it much.
"Haha, I don't understand. Then let me ask you, why do you think cotton clothes can keep you warm?"
Su Jing asked with a smile.
Zhu Biao replied: "Because the cotton-padded clothes are very thick, the cold is kept out of the cotton-padded clothes."
A very intuitive answer.
Su Jing said: "It's not accurate to block the cold. In fact, remember the three-state changes of water I told you before."
That was what Su Jing said when she first introduced Zhu Biao to the physics folding door.
"Of course students remember that water has three states. The most common one is liquid, which is the water I usually drink. When the temperature reaches below zero, it solidifies into ice. Ice is the solid state of water. If precipitation is heated to boiling, water It will evaporate and form white water vapor.”
Zhu Biao immediately repeated what Su Jing said at that time.
He was really serious about memorizing all the knowledge that Su Jing had taught him.
Su Jing nodded and said: "Very good, what is the essence of the process of ice turning into water?"
Zhu Biao immediately replied: "Melt, absorb heat and melt."
Su Jing smiled and said: "Yes, it absorbs heat. When ice turns into water, it absorbs heat. To absorb heat is to absorb heat. On the other hand, when water turns into ice, it solidifies, and solidification releases heat."
"It goes without saying that there is a difference in temperature between ice and water. So whether it is cold or not, the essence is actually the transfer of heat. Can you understand?"
Su Jing paused and gave Zhu Biao some time to think.
He still remembered that when he was watching a certain variety show in his previous life, a certain artist couldn't understand how to keep warm and cold.
I actually thought that if the popsicles were wrapped in a quilt, they would melt faster.
That is actually a lack of understanding of the nature of hot and cold.
Fortunately, as the prince of the Ming Dynasty, Zhu Biao didn't have any mental problems.
Soon Zhu Biao nodded and said: "Master Su, students understand, the reason why cotton-padded clothes can keep us warm is because they block our own heat from transmitting outward. Our body temperature is maintained inside the cotton-padded clothes, so we naturally feel warm." "
Children can be taught!
Su Jing looked at Zhu Biao, nodded slightly and said, "Very good. After understanding this layer, let's look at it. As a medium, cotton-padded clothes can well block the transfer of heat, so cotton-padded clothes are used to keep out the cold in winter."
"However, Niu Yi, have you ever noticed that cotton clothes are always new and the warmest, and so are quilts. When winter is coming, cotton craftsmen start walking around the streets, and people take out their quilts and put them Re-bounce the cotton in the quilt to make the quilt warmer."
Zhu Biao really didn't expect this little phenomenon in life.
Because he is the prince, and the prince was the heir before him, and his family conditions have been very good since he can remember.
This kind of life-oriented thing is not that common.
But that's not the case at all.
At least the matter of playing cotton will be done uniformly in the palace in winter.
Zhu Yuanzhang was not extravagant in life.
"Indeed, the cotton that has been stretched and made into cotton-padded clothes and quilts will be even warmer."
Zhu Biao nodded, but there was a hint of doubt in his expression: "Why?"
If cotton can keep warm, elasticity is just a physical change and does not add anything. How can it improve the thermal insulation effect?
Su Jing looked at the confused Zhu Biao and said, "Come on, Niu Yi, raise your hands, put your palms together, and then slowly approach, remember not to put them together."
Zhu Biao immediately followed Su Jing's words and made a clasping motion with his hands, but there was still a certain distance between his palms.
"Feel nothing."
Su Jing asked.
Zhu Biao replied: "Hot! Master Su, the students can feel the heat in the middle of their hands."
"Yes, the human body is like this, constantly emitting heat, and air can also be used as a medium for heat transmission."
Su Jing said: "Stretching cotton is actually to make the cotton fluffy. There will be a lot of pores in the middle of the fluffy cotton, and there will be more air in it."
"Among our common substances, the thermal conductivity of the medium air is actually relatively poor, that is, the ability to transfer heat is weak."
"So, the fluffier the cotton, the better the warmth-keeping effect of the quilts and jackets made. It's all because of the air."
"The same principle applies to the thermal insulation effect of heavy snow. The layers of snow are piled up one after another. They are very fluffy and have a lot of air, which ensures that the heat is not lost."
"This is the secret of heavy snow insulation, but if the snow is compacted, the insulation effect will be much worse."
Su Jing grabbed a pile of snow and squeezed it hard, and it immediately turned into a small snow ball.
Zhu Biao also squatted down, held the snow in both hands, and brought it close to his eyes to observe carefully.
Sure enough, as Su Jing said, the snow is fluffy.
Just a snowfall, Zhu Biao was shocked by the knowledge Su Jing told.
"That's not right, Master Su. According to you, with the heavy snow keeping warm, shouldn't the diseases and insects in the soil be protected as well? I said before that the insects would freeze to death, and you're not wrong!"
Zhu Biao had another doubt. He was not a dull student who could only listen to lectures and memorize them.
Su Jing said with a smile: "Isn't it very simple? In spring, the snow will melt, and the melt will absorb heat. The temperature of the soil will drop rapidly, and the insects in the soil will be frozen to death. As the saying goes, it is cold before frost, and snow is This is the truth behind Houhan.”
It turned out to be back to the point of melting knowledge.
Zhu Biao looked at Su Jing, his eyes full of shock and admiration.
He bowed towards Su Jing and said: "Students should be taught."
Su Jing waved her hand and said: "Why are you doing these frivolous things? I don't know whether you have really learned it or not."
"In this way, I will give you a question. Use the principle of air insulation to burn a batch of strong and warm bricks."
(End of chapter)
