"In this world, nothing lasts forever. Water will turn into steam and freeze, stones will be weathered into dust, and metals will turn into liquids at high enough temperatures. Under changing conditions, any Nothing is eternal." Ren Baqian stood on the stage and said to the crowd.
Everyone below listened to the lecture honestly, although each of them looked a little older and stronger, which was different from ordinary elementary schools in remote mountainous areas. But the essence is the same, Ren Baqian has learned to ignore the surface to see the essence.
At least in this case yes.
Ren Baqian has already started to consider whether to customize school uniforms for them.
There are also red scarves and one bar, two bars, and three bars.
However, Ren Baqian felt that it could be changed to one knife, two knives... until nine knives.
After a period of time, everyone is familiar with this new life and new identity.
And a little bit of interest was piqued.
After all, many of the things Ren Baqian said were unheard of, or even thought about.
Some content can be accepted by everyone, while others are difficult to accept, such as what Ren Baqian said just now, someone immediately raised their hand to ask questions.
Ren Baqian was very satisfied, although it didn't take long, but under his care and love with the barrel of a gun, these brats finally learned to raise their hands to ask questions.
The gauze on several students is the price of love.
It is not ruled out that two of them were accidentally injured, but don't pay too much attention to these details.
"Say it!" Ren Baqian pointed at a young man below with a finger-thick pointer made of a piece of pure iron.
"The heroic souls of our ancestors are eternal, and they have been protecting us." The boy said loudly.
Ren Baqian tilted his head to look at him, his gaze made him feel a little embarrassed, and he was alerted in his heart.
"That's right. There are still some things in this world that people can't detect, including the heroic souls of the ancestors. So what I teach now is the basic composition of the world, those things that have been discovered, and those things that are still unknown. It will be handed over to you.
Science is to stand on the shoulders of predecessors to continuously discover the unknown, not to deny the unknown. I hope you will remember this. "Ren Baqian smiled calmly.
He does not deny the existence of those heroic souls, just like the earth cannot deny the existence of ghosts. These are unknown things, and they have not been discovered yet, but it does not mean they do not exist.
Just like he hasn't found the reason for time travel, it doesn't mean it doesn't exist, it just means he hasn't found it yet.
Ren Baqian's calm smile made many students breathe a sigh of relief, and their hearts were also a little joyful.
This was Ren Baqian's rare affirmation to them.
Little Luoli Tonglan leaned on her chin with one hand, grinning, laughing at the idiots around her.
"The world is made up of molecules, atoms, and ions. This is the foundation of the world. These molecules, atoms, and ions, which are invisible to the naked eye, make up all the substances in this world."
"Teacher, since we can't see it, how can we know that what you said is true?" Someone immediately raised his hand and asked.
"Molecules cannot be seen with an optical microscope, and an electron microscope is needed. If the conditions are right in the future, I will get you a set. Besides, there are many ways to prove it, and I will tell you about it later." Ren Baqian said lightly.
Immediately someone asked what an optical microscope and an electron microscope are, and Ren Baqian gave simple answers to these questions.
Usually the situation in physics class is not bad, and Ren Baqian is usually in a good mood.
So the physics class is placed in the first section.
"Today, let's do an experiment about the structural transformation of water. The first point is that under normal atmospheric pressure, water can reach the boiling point at 100 degrees, and transform from water to water vapor..." Ren Baqian talked eloquently while introducing Small pots, alcohol stoves, and thermometers are all placed on the desk.
"Come on, let's take a look, the thermometer has reached 80 degrees now, and 100 degrees is the boiling point of water..." Ren Baqian said, and everyone looked at it.
Although everyone knows that water will have steam after boiling, it is the first time that such a formal experiment has been conducted, and many people are very interested.
Then everyone watched the water temperature exceed 100, 101, 102, 103... 110...
"Okay, now it has been proved that under normal atmospheric pressure, 110 degrees is the boiling point of water, and it turns into a gas. And under this pressure, the temperature of water will also remain at 110 degrees." Ren Baqian extinguished the alcohol lamp by the way Throw the pot out of the window together.
"Teacher, you just said 100 degrees." Little Luoli Tonglan's face was piercing.
"The air pressure is not constant, and it is different in each region. Usually, the higher the place, the lower the air pressure. Now it is 110 degrees here. You just need to remember that the higher the air pressure, the higher the boiling point, and the lower the air pressure, the lower the boiling point." Ren Ren Yaqian discovered for the first time that the air pressure in this world is different from that of the earth.
This also reminded him again, although he didn't feel much difference, but this world is a different world after all, and many places still have to be different from the earth.
If you want this world to develop technology, you need to verify everything a little bit.
Otherwise, you can't tell when you will be slapped in the face again.
Then he used saltpeter to turn the water into ice in front of everyone's eyes. Everyone was surprised, and immediately thought of the shaved ice sold outside.
This class talks about these two forms of water changes.
When get out of class was about to end, Ren Baqian sent someone to the next room to bring the textbooks he had brought back and distributed them to everyone.
"Teacher, what is this?"
"Your future study materials will come from my country." Everyone knows that Ren Baqian is not from Dayao. But which country Ren Baqian is from, few people really know.
"I come from a very distant country, so far away that you can hardly reach it in your lifetime. Our country is very different from here. In our country, people prefer to study the nature of the world. In our opinion, the recognition of the world The level of knowledge will become your own strength, and you can do things that you couldn't do before... "
"For example, equipment that can run faster than a galloping horse, equipment that can fly in the air, equipment that can lift objects of one hundred thousand or one million catties..."
It was also the first time that Ren Baqian frankly told some things about the earth to people other than the empress.
Before, I was afraid that people would know that I had a lot of good things in my hands and make up my own mind, so I didn't dare to say more. But with the change of status, he no longer needs to worry about this, and naturally there is no need to hide it. What's more, I have already exposed a lot of things.
Instead of letting them guess, why don't you take this opportunity to say something briefly.
There's nothing to hide and hide from others.
It's better than letting them guess whether they are from Daxia or Yunguo.
"Teacher, what is this thing?" Someone asked, pointing to a picture just after opening the physics book. "Is it the device you mentioned?"
"It's a high-speed rail, which can run more than 1,200 miles in one hour without rest. It takes only one or two hours to reach places that would have taken a few days to reach.
If there is this in Dayao, it only takes two hours to get to Pingcheng from here. If there is anything, our army can reach Pingcheng in just two hours.
Ren Baqian's words made everyone look surprised.
You must know that from Lancheng to Pingcheng, it takes half a month for a carriage to travel, and it takes three to four days for a fast horse.
If there is this thing in the war, it can be said that it can be supported at any time, and the battle report can be sent back at any time, which is of great value.
Most of the people here are the second generation of officials, even if they are not very talented, even if they are a little reckless, this thing can still be imagined.
"To build a high-speed rail, you need a lot of things. I can teach you, and it's up to you when it can be built." Ren Baqian smiled.
He likes to see the look of excitement and anticipation on the faces of these students, which gives him a sense of accomplishment.
Then he told the students some other things, and those students all stared round as if they were listening to a bible.
Tonglan and Shi Gan stopped distracted and listened intently.
However, this bliss did not last long.
In the second class, Ren Baqian's roar sounded again.
And gunshots rang out directly in math class.
"Let the people from the medical bureau come!" Ren Baqian shouted towards Xu Wei with the veins on his forehead. "Let them send someone to stay here as a school doctor..."