"In this world, nothing is eternal. Water can turn into steam, it can also freeze. Stones can be weathered into sand and dust. Metals can also be turned into liquid under high temperatures. Under changing conditions, nothing is eternal," Ren Baqian said to everyone on the stage.
Everyone listened to him obediently. Although they looked a little older and stronger, they were different from ordinary primary schools in remote mountainous areas. However, they were essentially the same. Ren Baqian had learned to ignore the surface and look at the essence.
At least on this matter.
Ren Baqian had already started to consider whether to customize their uniforms.
There were also red scarves and one, two, three stripes.
However, Ren Baqian felt that they could be changed to one knife, two knives … all the way to nine knives.
After a period of time, everyone had become familiar with this new life and their new identities.
Their interest was also aroused.
After all, many of the things that Ren Baqian talked about were unheard of and even unthinkable.
Some of the content was acceptable, while others were difficult to accept. For example, Ren Baqian's words just now.
Ren Baqian was very satisfied. Although it hadn't been long, this group of naughty kids had finally learned to raise their hands and ask questions under the care of his gun.
The bandages on several students were the price of love.
He couldn't rule out the possibility that two of them were accidentally injured, but he didn't care too much about these details.
"Speak!" Ren Baqian used a pointer made of pure iron and as thick as a finger to point at a young man below.
"The heroic spirits of our ancestors are eternal. They have always been protecting us," the young man suddenly said loudly.
Ren Baqian tilted his head and looked at him. His gaze made the young man feel a little uneasy and vigilant.
"That's right. There are still some things in this world that people can't detect, including the heroic spirits of our ancestors. Therefore, what I'm teaching now is the basic structure of the world, the things that have been discovered, and the things that are currently unknown will be handed over to you.
Science is about standing on the shoulders of the predecessors and constantly discovering the unknown, not denying the unknown. I hope you all remember this. "Ren Baqian smiled very calmly.
He didn't deny the existence of those heroic spirits, just like how Earth couldn't deny the existence of ghosts. These were all unknown things that hadn't been discovered yet, but it didn't mean that they didn't exist.
Just like how he had not found the reason for his transmigration, it did not mean that it did not exist. It only meant that he had not discovered it yet.
Ren Baqian's calm smile made many of the students heave a sigh of relief. They were also somewhat elated.
This was a rare affirmation from Ren Baqian.
Tong Lan supported her chin with one hand and grinned. In her heart, she was laughing at the bunch of idiots around her.
"The world is made up of molecules, atoms, and ions. This is the foundation of the world. These invisible molecules, compounds, and ions make up all the matter in this world. "
"Teacher, since we can't see it, how do we know if what you said is true?" Someone immediately raised his hand and asked.
"You can't see the molecules with an optical microscope. You need an electron microscope. If the conditions are right in the future, I will make a set for you. In addition, there are many other ways to verify it. I will explain them to you in the future, "Ren Baqian said faintly.
Immediately, someone asked what an optical microscope and an electron microscope were. Ren Baqian gave simple answers to these questions.
Usually, the physics class went well, and Ren Baqian was in a good mood.
Therefore, the physics class was held in the first period.
"Today, we will do an experiment on the transformation of the structure of water. First, under normal atmospheric pressure, water will reach its boiling point at 100 degrees Celsius and turn from water into water vapor … "Ren Baqian spoke with fervor and assurance as he placed a small pot, an alcohol stove, and a thermometer on the desk.
"Come, let's take a look. The thermometer has reached 80 degrees Celsius, and 100 degrees Celsius is the boiling point of water …" As Ren Baqian spoke, everyone craned their necks to take a look.
Although everyone knew that water would turn into water vapor after boiling, this was the first time such a formal experiment was conducted. Many people were very interested.
Then, everyone watched as the temperature of the water exceeded 100,101,102,103 … 110 degrees …
"Alright, it has now been proven that under normal atmospheric pressure, water will boil at 110 degrees Celsius and turn into gas. At this pressure, the temperature of the water will also be maintained at 110 degrees Celsius. "Ren Baqian extinguished the alcohol stove and threw it out of the window along with the pot.
"Teacher, you said 100 degrees Celsius just now." Tong Lan's eyes were bright and full of expression.
"The atmospheric pressure isn't constant. It varies from region to region. Usually, the higher the altitude, the lower the atmospheric pressure. Here, it's 110 degrees Celsius. You just have to remember that the higher the atmospheric pressure, the higher the boiling point, and the lower the atmospheric pressure, the lower the boiling point. "This was the first time Ren Baqian realized that the atmospheric pressure in this world was actually different from that on Earth.
This also reminded him once again that although he didn't feel much difference, this world was, after all, a different world. There were still many things that were different from that on Earth.
In order to develop technology in this world, everything had to be verified little by little.
Otherwise, he might get slapped in the face again.
Next, he used saltpeter to turn water into ice in front of everyone. This surprised everyone and immediately reminded them of the shaved ice that was sold outside.
This lesson talked about the two forms of water transformation.
When the lesson was about to end, Ren Baqian asked someone to move the teaching materials that he had brought back from the next room and distributed them to everyone.
"Teacher, what are these?"
"Your future learning materials are from my country." Everyone knew that Ren Baqian wasn't from Dayao. However, not many people knew which country Ren Baqian was from.
"I come from a very distant country. It's so far away that you will never be able to reach it in your lifetime. Our country is very different from this world. In our country, people prefer to study the nature of the world. In our opinion, the degree of understanding of the world will become one's strength and allow one to achieve things that were previously impossible … "
"For example, a machine that can run faster than a galloping horse, a machine that can fly in the air, a machine that can lift objects that weigh 100,000 kilograms or even 500,000 kilograms …"
This was also the first time that Ren Baqian frankly talked about some things about Earth to someone other than the empress.
Previously, he was afraid that people would know that he had a lot of good things in his hands and set their eyes on him. As a result, he didn't dare to say much. However, with the change in his status, he no longer needed to worry about this and naturally didn't need to hide it. Furthermore, he had already exposed a lot of things.
Instead of letting them guess, he might as well take this opportunity to briefly explain.
There was nothing shameful about it.
It was better than letting them guess whether he was from Great Xia or the Yun Nation.
"Teacher, what's this?" someone pointed to a picture that had just been flipped open in a physics book. "Is this the machine that you mentioned?"
"It's a high-speed rail that can travel more than 1,200 kilometers in two hours without any rest. A place that would normally take a few days to reach on a galloping horse can be reached in just two to four hours.
If Dayao had this, it would only take four hours to reach Ping City from here. If anything happens, our army can reach Ping City in four hours.
Ren Baqian's words caused everyone to look surprised.
One had to know that it would take half a month to travel from Lan City to Ping City by carriage and three to four days on a galloping horse.
If there was a war, they would be able to provide support at any time with this thing. Furthermore, battle reports could be sent back at any time. This was too valuable.
Most of the people present were the children of officials. Even if they weren't very talented or reckless, they could still think of this thing.
"If you want to build a high-speed rail, you need a lot of things. I can teach you, but it's up to you when it can be built. "Ren Baqian smiled.
He liked to see the excitement and anticipation on the faces of these students as it gave him a sense of accomplishment.
Following which, he told the students some other things. The students felt as if they were listening to a book from heaven, and all of them widened their eyes.
Tong Lan and Shi Gan didn't get distracted and listened attentively.
However, this joyous atmosphere didn't last for long.
During the second lesson, Ren Baqian's roar was heard again.
During the mathematics class, gunshots were heard.
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