Li Zhi, don't be a coward

Chapter 490

The crude hydraulic press slowly took shape under Li Qinzai's design.

The water from the reservoir continued to pour into the big iron tank, and it soon filled the big iron tank.

Everyone looked at Li Qinzai anxiously, waiting for his next order.

Li Qinzai stood beside the hydraulic machine with his hands behind his back like a general who lashed out at Fang Qiu, and waved his hand at the trilogy, and the water injection port immediately cut off the water source.

Seeing that everyone was unclear, Li Qinzai smiled and said to the blacksmiths, "Can you make a piece of iron that is as thin as a cicada's wing?"

The blacksmiths froze and shook their heads together.

Of course, iron sheets can be made. Many hairpins used by powerful families and women's families, as well as various exquisite small objects for decoration, need to use iron sheets or gold sheets, and blacksmiths are competent.

However, putting aside the big and small novels, iron pieces are hooligans.

They can make iron sheets the size of a finger or even the size of a palm, but an iron sheet with a radius of one foot is as thin as a cicada's wing. No one in the world can make such a craft.

This is the current situation in this era. In terms of refining and metallurgy, relying solely on personal skills is actually very limited. No matter how powerful the skills are, it is really difficult to make a piece of iron with a radius of one foot, let alone keep the whole piece of iron as thin as a cicada's wing. situation is basically impossible.

Li Qinzai also knew the current situation of iron smelting by hand, so he said with a smile, "Today, let me open your eyes."

So Li Qinzai ordered the blacksmith to heat up a huge iron block, beat it into a round cake shape, and then put it into the furnace for calcination.

The pliers held the red, round pie-shaped iron block out of the furnace. Li Qinzai asked someone to put it between the anvil and the iron ingot of the hydraulic press, and then ordered the steps to knock off the buckles between the piston and the iron cylinder at the same time. .

With a loud bang, the iron ingot filled with water on the upper part slammed down with a huge pressure, and smashed hard on the red round cake iron.

After the loud noise, sparks flew everywhere, and the round cake, which was originally thick as a little finger, became only half the thickness of a little finger in an instant after being hit violently by the iron ingot.

"Go on, three more times." Li Qinzai ordered.

The trilogy members pulled the pulley block quickly, and the huge iron ingot slowly rose. At the same time, the round cake iron block was also stuffed into the furnace to continue calcination.

When the iron ingot rises to the top, the burnt red round cake is taken out again and placed between the iron ingot and the anvil.

The huge iron ingot fell again, and after a loud noise, the iron block half the size of a thumb instantly turned into a slightly thick iron sheet, only about one centimeter thick.

"Continue." Li Qinzai ordered.

The same process was carried out twice more. The blacksmith took out the iron sheet with pliers, and after pouring water on the surface to cool it down, everyone gathered around and compared the thickness of the iron sheet with two fingers.

I suddenly found that it was as thin as a cicada's wing, and the surface was smooth and flat, without any unevenness, just like an exquisite work of art.

This is a work that the blacksmith's hammer could not have hammered anyway.

Everyone was stunned, as if by a magic spell, the piece of iron that was as thick as a little finger just now became the piece of iron that was as thin as a cicada's wing after only four taps.

The layman looks at the excitement and the insider looks at the doorway.

The onlookers, the students and the peasants, only thought it was amazing, but the blacksmiths were all experts. They knew very well how difficult it was to beat a piece of iron into such a thin piece of iron, and it was almost impossible to do it by manpower.

"Li, Uncle Li, is this... true?" A blacksmith stared blankly at the iron sheet in front of him, still in disbelief.

"It's fake, it's all your hallucinations, you've been too tired recently, go back and get some sleep." Li Qinzai said softly.

The blacksmith dazedly touched the piece of iron that was still warm, and his whole body trembled: "No, it's true! You can really make a piece of iron that is as thin as a cicada's wing. This is simply... a fairy method?"

"How it came out, you saw it with your own eyes." Li Qinzai didn't intend to explain it too clearly to the blacksmith, because he would definitely not understand.

Turning around and beckoning to the students watching in the crowd, Li Qinzai said, "Come closer, do you think that you can disappear from the crowd by mixing in the crowd? I still see you stupid in the crowd at a glance, it's so vivid."

The students were so embarrassed by the loss, they stepped forward one by one consciously, and observed around the iron sheet.

Li Qinzai said indifferently: "You always say that mathematics is too complicated and boring, and you don't understand why I always say that mathematics is just a tool."

"Then today I will let you see with your own eyes why arithmetic is just a tool and who it serves."

"This piece of iron, you watched it take shape with your own eyes, so how did it take shape? Why can the blacksmith make something that cannot be made by hand, but this big guy I made can make it in a few strokes?"

Facing the probing eyes of the students, Li Qinzai slowly said: "This piece of iron is also a science, it is called 'physics', the physics knowledge I used just now is a small category of it, called 'Newton's third law' ...Well, no, it's called the 'Third Law of Jingchu'."

Li Qinzai straightened out his chest and greeted everyone's adoring eyes without guilt.

Who is Newton?His grandfather's grandfather's grandfather is still only a single cell, sorry, I reincarnated earlier, let me come first.

"The so-called 'Third Law', its essence is the law of collision between objects, the action force and the reaction force must be equal, it doesn't matter if you don't understand what action force is, open your ignorant eyes..."

"For example, you are too stupid, and I couldn't argue with it, so I raised my hand and slapped you across the face, right? But if you have slapped others, you will know that your hand also hurts. This is the action force and reaction force. "

"The piece of iron in front of me is formed by the impact of action force and reaction force. The force is mutual. The density and volume of the object under the force are different, which will determine whether the shape of the object can be changed after the impact..."

Seeing that the eyes of the students were still wide open in surprise, Li Qinzai said slowly: "This science is called 'physics'. What I just said is the introductory knowledge of physics. When you understand what I just said, congratulations. , you have half-stepped into the new world of 'physics'."

"The thing I built is called 'hydraulic press'. It can forge large pieces of iron, so that iron can reach a more precise standard. Whether it is people's livelihood or military, it can change the world, but you have to be clear, it is not the hydraulic press that changes the world. It was physics that changed the world."

The students were stunned and bowed to Li Qinzai one after another.

"Thank you sir for teaching me."

Behind Li Qinzai, the blacksmiths also saluted with red eyes: "Thank you Li Xianbo for your teaching. Although the villain can't understand it, but the Tang Dynasty has such a talented national weapon as Li Xianbo, which is the blessing of the country and the blessing of all the people."

(End of this chapter)