Through the "making" of rainbows, Song Yang initially established the status of nature classes.
After that, he began formal teaching.
The first is to let students understand the application of natural science in life.
This can also increase students' enthusiasm for learning.
Song Yang started with physics.
He took a steelyard as a teaching aid and told the students what the principle of leverage is.
Then we sourced local materials and asked the construction team at the dock site to bring a set of fixed pulleys.
Fixed pulleys have been used among the people in the Daqian Dynasty, and they were most commonly used in loading and unloading cargo, construction, etc.
Through the explanation of fixed pulleys, children can understand another application of the lever principle.
The workers who came with the pulleys were also taught a lesson.
In the past, they only knew how to use it, but didn't understand the principle.
After Song Yang's narration, some smart people actually understood the truth behind it.
So Song Yang directly modified the fixed pulley to form a pulley block.
"Lao Xu, come and try." Song Yang handed one end of the pulley block to Lao Xu.
The pulley block is fixed on the roof beam of the work shed, and the other end is tied to a stone on the ground.
This stone is used as the foundation stone of the warehouse, and one piece weighs about a hundred kilograms.
Lao Xu was the master who installed the fixed pulley for Song Yang.
As a result, Lao Xu tightened Song Yang's rope with doubts.
He has never seen a pulley like this before. Why is there a pulley fixed on the top and another pulley hanging below?
Won't this add weight?
As the rope tightened, the expression on Lao Xu's face became more and more solemn.
"This...how could this happen!"
Lao Xu looked at Song Yang with experience.
He has been working on construction sites, and he knows the weight of this cornerstone very well.
He does the operation of pulling the foundation stone through the fixed pulley almost every day.
But now Song Yang changed the pulley like this, and Lao Xu immediately felt the obvious effect.
The foundation stone is lighter than before!
"Your Majesty! How did you do it?"
The fixed pulley only allows the foundation stone to change the direction of the force, but it does not save effort.
But after Song Yang's modification, I can really feel that the stone has become lighter!
"This hanging pulley is called a movable pulley, and this fixed pulley is called a fixed pulley."
"They are combined into a pulley block."
"The fixed pulley changes the direction of force, while the movable pulley is the key to saving effort."
"Theoretically, the more moving pulleys there are, the less effort there is."
Song Yang said as he improved the pulley block again.
Soon, a pulley block with a moving pulley appeared.
Lao Xu tried it again, and it was indeed more labor-saving!
"Your Majesty! Does that mean that by adding ten or eight pulleys, we can easily lift heavier objects?"
Lao Xu asked excitedly.
Originally it was a lecture for students, but now it is a lecture for workers.
Song Yang shook his head and said: "This only exists in theory."
"Did you see that every time a pulley is added, the rope grows longer?"
"So there is a limit to the number of pulleys that can be added."
"And the entire pulley set needs to be fixed at the point of the roof beam. Adding pulleys also increases the total weight."
"If the weight exceeds the bearing capacity of the fulcrum, the beam will break."
Song Yang pointed to the beam, and Lao Xu looked up. Sure enough, there was a mark on the beam pressed by the rope.
"Now that you know the principle, you can also make the pulley block. Go back and explore on your own how to apply the pulley block."
Song Yang patted Lao Xu on the shoulder and said.
After such an incident, the students' enthusiasm for studying nature became unprecedentedly high.
Because Song Yang said, if they learn to be natural, they can easily lift the cornerstone.
You can even do it with one hand!
This is the charm of nature.
From the principle of leverage, Song Yang started the teaching of nature courses.
Then he talked about some simple chemistry knowledge.
For example, if you fan the flames, why the fire will burn more and more fiercely.
For example, sucrose will become darker and darker when heated in a pot.
And why do nails rust?
This series of common problems in life were thrown out, and the children were all shocked.
Although they couldn't understand most of what Song Yang said, their enthusiasm for the nature class became increasingly high.
Just attended the class for one day.
As dusk approached, Fang Zhe finished his work and came to the school.
I happened to be listening to the end of a nature class.
"The prince actually knows how to investigate things!"
Fang Zhe looked at Song Yang with admiration.
In Daqian and the dynasties before Daqian, this way of doing learning also existed.
Check things.
It is recorded in "Book of Rites·Da Xue": "To achieve knowledge is to examine things, and then to know."
This is a relatively special sect of the Confucian system, and its research is similar to natural science.
It is an attitude and method for human beings to explore natural science.
However, this school of thought is not the mainstream of the school and has gradually declined.
Fang Zhe didn't expect that Song Yang could actually study objects.
Song Yang smiled and said: "This is not the study of things, it is natural science. It is much higher than the state of studying things."
Fang Zhe scratched his head and said: "Natural science is higher than the realm of studying things? This... I really don't understand."
"In the future, if you are free, you can come and listen to the class. There is no harm in learning some things."
"After some theoretical knowledge is laid, I will implement another more advanced reform."
Song Yang said with expectation.
He looked forward to launching an industrial revolution in Daqian.
But this prerequisite requires some people with common sense and basic theoretical knowledge.
Otherwise, even if Song Yang himself is exhausted, he will not be able to create an industrial revolution.
"What kind of chicken is the prince talking about? Steam chicken?" Fang Zhe asked.
Song Yang had mentioned it to him before.
"Yes, that's the kind of thing."
"Our main problem now is the lack of manpower. If we can build a steam engine, it can replace most of the manual work."
Song Yang wanted to carry out the industrial revolution, which is also related to the current sharp decline in population.
Since the population is not enough, we need technology to make up for it.
With the steam engine, more production goals can be accomplished with a limited population.
Even with the advent of mechanical power in the future, the efficiency of iron and steelmaking will be greatly improved.
When the time is right, the internal combustion engine can also be moved out.
Once the internal combustion engine comes out, we will not be far away from animal-powered farming.
"Is this chicken so powerful?" Fang Zhe asked doubtfully.
"It's a machine, not a chicken!" Song Yang emphasized.
"This kind of machine can greatly improve productivity. The efficiency of spinning, weaving and other tasks can be increased by ten times or even more!"
Song Yang did not dare to directly say that there would be extreme improvements hundreds of times in the future, because he was afraid of scaring Lao Fang to death.
Ancient people's cognition really couldn't imagine anything that could increase work efficiency hundreds of times...
"Let's go. Let's go eat first. There are evening classes in the evening. It's natural to have night classes today."
"You will also come and listen to the class later."