Daming: The system rejected my request for salted fish

Chapter 899

Since the establishment of the Academy of Science and Technology, Wei Wu has also demonstrated some technological products and scientific principles to the craftsmen.

But most of the time is spent on lecturing and imparting knowledge. Unless it is necessary, I basically won’t waste time doing experiments for them to watch.

In fact, the craftsmen would rather conduct experiments while teaching, but as students they did not dare to tell Wei Wu.

After all, although scientific knowledge is good, it will make the class more lively and stimulate the desire to learn if it is combined with experiments that can be seen with one's own eyes.

That's why the craftsmen were so excited when they heard that Wei Wu was going to do an experiment, and their necks were stretched out.

As for Wei Wu, it wasn't that he didn't want to do the experiment, but that he didn't think of it. After all, he was not a full-time teacher and didn't know how to prepare lessons.

However, after seeing the feedback from the craftsmen, Wei Wu is also thinking about whether he should slightly change his teaching methods.

While thinking in his mind, Wei Wu did not stop his hands and opened the lid of the insulated box in front of everyone.

As the cold air hit him, Wei Wu smiled when he saw that the things in the insulated box were in good condition.

Then, under the gazes of the craftsmen, Wei Wu reached into the insulated box and took out a palm-sized ice cube.

After placing the ice cubes on the porcelain plate that had been prepared long ago, Wei Wu slowly spoke:

"The experiment I'm going to demonstrate to you next is called 'supercooled water,' which is the physical process of water freezing."

As he spoke, Wei Wu reached into the insulated box again and took out a bottle of mineral water covered with water vapor in front of everyone.

Although the bottle is covered with water vapor, everyone can see that the water in the bottle is indeed in a liquid state.

Immediately afterwards, Wei Wu unscrewed the cap of the mineral water bottle and slowly poured the water in the bottle onto the ice, and a magical scene happened.

The water, which was originally in liquid state, instantly solidified into crystals when it came into contact with the ice, forming a small ice bag on the ice.

Then as Wei Wu continued to pour, more water flowed down, and the small ice bag became bigger and gradually higher.

Finally, after pouring one-third of the bottle of water, Wei Wu stopped, and an icicle appeared on the ice.

"Oh my god! Am I seeing things? The water actually turned to ice. How on earth did they do that?"

"That's right! If I hadn't seen it with my own eyes, I would never have believed that water could actually turn into ice."

"Why did this happen? It was just ordinary water a moment ago, but it immediately turned into ice after hitting that piece of ice."

"Could it be that the ice is the legendary thousand-year-old ice, emitting cold air itself, and that's why it can freeze the water?"

After seeing the experiment done by Wei Wu, the craftsmen all expressed their feelings, but some people were different from others.

The craftsman who talked about the thousand-year-old ice had just finished speaking when all the craftsmen around him looked towards him.

"Hey, this is the Academy of Science and Technology, everything is about science. How did you manage to tell myths?"

"That's right, that's right. If you want to talk about mythology, please go to the teahouse. Our Academy of Science and Technology always talks about science and never mythology."

"What group are you from? Who brought you in? You're talking like a legend the moment you start talking. You're dragging the rest of us down!"

Just as the craftsmen were criticizing, Wu Qiang suddenly emerged from the crowd and grabbed the craftsman's ear.

"I'm sorry, I'm sorry, he's from my construction team, and it's his first time attending a class and he doesn't know the rules. Please forgive me, please forgive me!"

After saying that, Wu Qiang waved his hand and slapped the craftsman who talked about the thousand-year-old ice on the back of his head.

"You little brat, what nonsense are you talking about? Get out of here! You've brought shame to our entire team!"

Even Wu Qiang still felt unsatisfied, so he kicked the craftsman in the butt. Of course, it was just a lesson, not a real beating.

Wei Wu didn't care about this little episode. Instead, he found it quite funny. At the same time, he didn't think there was anything wrong with what they said.

After all, believe in science!

Of course, as a hacker with a system, he himself has reservations about the phrase "believe in science".

After a brief interlude, the craftsmen's attention was once again focused on the podium, their eyes fixed on the icicle.

Many of them were very curious and couldn't help but ask Wei Wu questions after watching for a while.

"Mr. Vice President, why did that bottle of water, which was clearly liquid, immediately turn solid after coming into contact with that piece of ice?"

"Yes, that's right! Mr. Vice President, you just said this is called super-cold water, so what is super-cold water?"

Hearing the craftsmen's questions, Wei Wu smiled slightly, raised his hand and signaled them to be quiet.

The next second, the entire classroom became silent, so quiet that you could hear a pin drop.

At this time, Wei Wu slowly said:

"I've told you before that water exists in three states: liquid, gas, and solid, depending on its temperature."

"It's liquid at room temperature, gaseous at 100 degrees, and solid at temperatures below zero, but this isn't absolute."

"There's also superheated water and supercooled water, but both of these states of water require eliminating another external factor besides temperature."

Originally, Wei Wu was only going to talk about cold water, but since we've come this far, he might as well talk about both of them together.

So when the craftsmen were eagerly waiting to receive the knowledge, Wei Wu spoke again:

"Superheated water means the temperature is over 100 degrees, but the water is still in liquid form, which requires increasing the pressure on the water."

"The greater the air pressure, the higher the boiling point of water. Of course, there is a limit. The temperature of liquid water can only be raised to 374.3 degrees."

"At this point, the water is in a supercritical state. No amount of heating can raise the temperature, and even increasing the pressure won't help."

"And once the pressure is too high, the water will not only not vaporize, but will freeze. Of course, it's not the common kind of ice."

"That's all you need to know. With our technology, we won't even be able to conduct experiments without hundreds of years of development."

To the craftsmen, Wei Wu's words were like a myth and they had no idea what they meant.

It is clearly being heated continuously, so how can the water not be vaporized? And what is this so-called air pressure?

Why would water at high temperature freeze when the air pressure is too high? This is too outrageous.

So after Wei Wu finished speaking, some of the cute and curious kids in the audience immediately raised their hands to ask questions.

"Mr. Vice President, what do you mean by air pressure? How can we create an environment with high air pressure?"