From Chief to Ball

Cheers echoed in the courtyard of the academy. After the cheers, these people gave an estimate based on their experience.

The acceleration of a force of one cow applied to an object with a mass of one catty must be greater than sixteen steps per second squared, but it should be between sixteen and twenty-four. The specific number needs to be measured more precisely.

This kind of measurement is very meaningful, because many students in the mathematics class will go to the artillery school after they finish their studies. They are too aware of how many meters the difference of one or two steps will bring to the landing point of the cannon.

This kind of measurement is not only meaningful, but also very important, at least for war.

Chen Jian patted his head, looking at the unrecognizable unit of measurement that has been changed, thinking that all the answers that are taken for granted in the future may no longer be taken for granted, and it needs to be converted and it is very troublesome.

And for those Mr. Xuegong who witnessed everything from the beginning to the end, they have already accepted this concept in their hearts: not relying on Chen Jian's words, but relying on hundreds of separate calculations and measurements afterwards, the first time they I feel my stalwart: give them an absolute environment, give them enough data, they can use arithmetic to calculate the motion state of any object, even... the sun, Yinghuo, Tai Sui, the moon or even... the entire universe.

At least, it seems so.

It's like a dream. In the dream, you are the master of the world, you are Pangu who opened the sky, and you make all the rules of this world.

In the real world, you are not Pangu, nor are you the ruler, but you have begun to spy on the Tao between heaven and earth.

I can't create the rules, but I spy the rules.So I cannot create the world, but I can measure the world!

The way of heaven and earth is wonderful, but the most mysterious thing is exercise!

At this point, Chen Jian simply took out the last and most critical question, and threw it out all at once.

As for whether people can accept and understand it, that's not important.Don't ask everyone to believe it, just ask some people to believe it, and continue to study on this basis.

Chen Jian turned around and found a booklet published by the academy. He had bought this booklet for two or three years, and it was also the first book he bought when he first came to this world.

"Everyone, there is a very interesting knowledge in this pamphlet, but I don't know if the author of this article is here?"

With the discussions and experiments in the past few days, no one regarded Chen Jian as a fledgling child who had just entered school.

Seeing Chen Jian take out the pamphlet, people couldn't help being curious, and even a little excited in their hearts.

Most of them have written something and left their names on it, but now it is a little different. It is naturally very important for the young man in front of him to think that the article is very interesting and important.

"Well, it's this gentleman about another solution to the volume of a sphere."

A person stood out from the crowd, about 30 years old, and said with a smile, "Is that the one who finds the circle by infinite slices? That's me."

There was a name on it, and Chen Jian knew that this person was named Bai Jingshuo.

Chen Jian rushed out to greet him and said, "Mr. Bai is from Yangguan?"

"That's natural. People with the surname Bai's ancestral home are all from Yangguan."

Chen Jian smiled strangely, but hurriedly said: "Sir, I really benefited a lot after reading this algorithm. I don't know how many people present can understand it?"

This was a bit harsh, Chen Jian hurriedly explained: "I'm really bad at math, so I have a question to ask, but this question is a bit difficult, so... please don't blame me, I am young and don't know the severity, and I don't understand Don’t blame me for having too many slick rhetoric. After all, I’m a stupid person, and I’ve been thinking about these things that other people think are boring since I was a child..."

When he said this, everyone didn't say anything, and many people were eccentric since they were young. This made these people feel a little sympathetic, and only Chen Jian's brothers and sisters were left holding back. laugh.

At the moment, there are more than a dozen people who stand up, and the rest of them specialize in different arts, and they even regret that they don't study arithmetic.Obviously, this might be an opportunity to become famous all over the world, but it will be snatched by these people who study arithmetic.

The dozen or so people who stand up are not just as simple as understanding, in other words, most of the people here can actually understand.But those who can stand up must have weighed their weight and determined that similar problems can be answered in a similar way, not just as simple as understanding.

If the problems of mechanics, mass, and speed seem to be a popular science definition, which can be understood by many people; then the subsequent problems are not popular science but require professional arithmetic knowledge, hyperbolic ellipse, initial microelement method, etc. knowledge explained.

Chen Jian has indeed studied calculus and can solve problems, but it is unrealistic for him to rearrange a set of calculus from scratch with the arithmetic level in line with this era. He is self-aware of this point. Land——After this time, it is only 50 years before he disappears from everyone. Maybe 50 years later, he can only look up to the world-famous figure who is also studying mathematics in the same academy.

This time Chen Jian didn't make big news, but still started from the simplest things.

A section, a stone, a circular motion before being thrown out.

A circle is drawn on the coordinate system, and the force analysis and tangent are given. It is obvious that a centripetal force is drawn so that the stone does not fly out before letting go; but after letting go, it will fly out in a straight line along the tangent concept.

"Gentlemen, you are proficient in arithmetic, but I don't have this ability. But according to the previous interpretation of force, assuming that the speed of the stone is constant, and the period of the stone winding around the lasso is constant, then the pulling stone What is the force toward the center of the circle?"

"I can only use the infinite division method. The rough calculation may be related to the speed, mass and radius, but I can't figure out the final relationship. Please help me."

Bai Jingshuo looked at the picture on the wooden board, the picture was actually very clear, and the thinking was completely correct, but it was troublesome to calculate.

The relevant formulas for acceleration, force, circle, and radius were all written out. Bai Jingshuo silently calculated in his heart, nodded and said: "It should be possible to calculate, but it will take a long time. Half a month, definitely not in half a month." Question. You are right, it should be related to the velocity radius and the quality you defined...Of course this is nonsense, the force must be related to the quality, but if you don’t define it, it will be difficult to explain.”

"Then please."

Bai Jingshuo smiled and said, "You don't want to just do this, do you? I think you still have a lot of boxes behind you. Anyway, you have plenty of time. Let us take a look at the rest. It will save me itching, right? Anyway, half a year After a month, I will give you the result of the calculation."

Not only him, many people stared at the box behind Chen Jian like sharks seeing blood.

In the beginning, the power of glass tubes and steam was used, so there must always be something finale.Besides, that was the case at the beginning, what will be the finale?

Chen Jian did not take it out immediately, but first used the simplest method of addition, subtraction, multiplication and division to redefine the concept of force as energy—since force gives an object an acceleration, then in the absence of other external forces, only those who know the motion of the object The distance also tells the instantaneous speed of the object when the force leaves, and the square of the speed multiplied by the mass and then divided by two is exactly equal to the multiplication of the force and the distance. This is a very simple arithmetic problem. For everyone present explain.

It's just that there is no thermometer at this time, so the problem of energy conversion cannot be defined, and there is still a long way to go.Chen Jian only used it to distinguish between force and power so that people could accept the concept of force, not to calculate energy, at least at this time energy has no meaning.

In the next ten days, Chen Jian took out all the things at the bottom of the box.

The broken barrel experiment and the water pressure area unequal experiment explained a common-sense question: why the dam should be built with a wide bottom and a narrow top, and it also explained why people's ears would be crushed when they swim to the bottom of the sea.

By the way, he proposed the idea of ​​a hydraulic press, but of course it is just an idea. It is not realistic to use it for rolling steel, but it is feasible to use it for oil extraction, considering the current conditions.

Then a simple thermometer was shown, the readings were inaccurate, but it was said that the error was about three degrees or so.

And another experiment was done with a simple mercury thermometer: diethyl ether was prepared at 140 degrees with concentrated sulfuric acid and alcohol, and absorbed with saturated sodium carbonate solution, because diethyl ether was insoluble in saturated sodium carbonate, so it was layered up and down, and with this simple The ether produced by the recipe stunned a dog.

What's even more amazing is that the dog woke up a long time after it was in a coma, and Chen Jian stabbed the dog twice while it was in a coma, and the dog didn't wake up.

So the students of the medical department were very excited. This thing can be used for anesthesia, it can be used on people, and it can be used to perform operations on people—it’s just too expensive, and there is only one place of concentrated sulfuric acid in Chen Jian’s place. There is no semicolon for sale.But the medical students who have dissected so many people understand that there are still people who can afford the money, at least some simple operations they can do-such as amputation will no longer sound like hell, and there is no need Every amputation on the battlefield requires eight strong men to hold down the hands and feet.

The finale is something that is incomprehensible and miraculous in this era, but in fact the truth is very simple.

Stacks, raw lacquer or hot-baked eucommia glue insulated copper wires, iron bars, and electromagnets.

Electrode stack, carbon rods, lacquered copper wires, and arc-light candles after two carbon rods are approached by hand, the current and voltage are not large, and you can't die if you touch them.

Magnets, raw lacquer copper coils, graphite brushes, hand wheels, and compass wobble after electrification. The previous electromagnet experiment proves that magnetism can generate electricity.

Magnets, lacquered copper coils with more turns, graphite brushes, hand wheels, carbon rods connected in parallel and very close to each other, insulated with Eucommia glue in the middle - the electric candle lasted for 60 seconds, not very bright, but Blind everyone's eyes.

No practicality, but can be studied side by side and developed at the same time.

At the end, Chen Jian climbed up and shouted: "We will usher in a new era!"

The young people cheered endlessly, but they couldn't suppress the long sighs from the crowd.

Many elders, including Mr. Mu, were both laughing and sad-Chen Jian let them see the future, but time cut off their hope.

There is no more tragic tragedy than seeing hope but being killed by time.