Xueba, I beg you to go and escort him quickly!

Group management 2, "[cover face expression] [cover face expression] [cover face expression]"

Group management 3,...

……

Xu Heng, "Go ahead! I won't bother you."

Group leader, "Ahem! Student Xu Heng, why don't you express your opinion? Of course, what we're discussing next is in a vacuum!"

"You also know very well that when discussing any physics problem, the prerequisites are very important!"

Xu Heng, "Group leader, you don't need to explain, I promise not to leave the group, you guys continue, really, don't worry about me."

Group leader, "[cover face expression]"

Xu Heng promised that he would not leave the group, but it did not mean that he would not block it.

Don't bother with these people anymore.

Xu Heng blocked the group.

"It's really boring. This group of people, if you have this time, why don't you watch dramas and play games?"

When Yang Kaixuan finished washing and came back, he also joined the discussion in the group.

By the way, I also asked, "Xu Heng! What do you think of this question?"

"Did you see what the group said?"

"Most people insist that in a vacuum, raindrops evaporate as they fall and don't fall to the ground."

Xu Heng was fighting the king, and he was doing two things with one mind, and replied, "This is half right, the external pressure gun does have a huge impact on the state of the water."

Yang Kaixuan, "???"

What the hell!

Xu Heng's opening was so professional!

Share in the group!

Be sure to share with the group!

Yang Kaixuan directly relayed it to the group.

As soon as these words were posted, many people in the group stopped.

Giving face and respect is one thing, but most of them want to see Xu Heng's real strength.

Seeing is better than hearing it!

Yang Kaixuan, "Xu Heng, what do you say?"

Xu Heng, "I remember there is a water phase diagram on the Internet. You can look it up. From the water phase diagram, we can see that the pressure will affect the freezing point of water."

"The solid, liquid, and gaseous states of water are three phases. The phase diagram is to distinguish the regions corresponding to the solid, liquid, and gaseous states in a coordinate system."

"The horizontal axis of the coordinate system represents temperature, and the vertical axis represents pressure. Whether water is solid, liquid or gas at different temperatures and pressures can be directly obtained from the phase diagram."

Yang Kaixuan couldn't remember, so he clicked on the recording directly.

On Xu Heng's side, the painting style changed suddenly, "Hiss! Why did it suddenly become lumpy? Don't! Hey..."

The sudden change of subject made everyone dumbfounded.

"What's the meaning of the last sentence?"

"???"

Yang Kaixuan immediately explained, "Xu Heng is playing games, playing games..."

Everyone, "Playing games? I'm stupid! Is this doing two things at once?"

Pfft! ! !

Xu Heng continued, "In the picture, the khaki area represents the solid state, the green area represents the liquid state, and the blue area represents the gas state."

"It's a group! It's a group!"

"You girl, keep up, don't fall behind."

Xu Heng is having an affair with Yue Pingting.

In order for Yue Pingting not to be too nervous in her studies, but to learn to relax, he played games with her and turned on the team voice.

Yang Kaixuan, "..."

Everyone in the crowd, "..."

Xu Heng continued, "When the temperature is lower than a certain value, that is, 251.165K, no matter what the external pressure is, water will not exist in a liquid state."

"When the pressure is lower than 611.73Pa, no matter what the temperature is, water will not exist in the form of liquid."

"At lower pressure and lower temperature, water can only exist in solid form."

We chatted about this issue for a while, and then switched to the game with Yue Pingting.

"Go and lead the line, don't keep assisting me! Yes! Then, go to open your vision."

Yang Kaixuan tried his best not to record Xu Heng's voice about the game, but Xu Heng switched freely and didn't give Yang Kaixuan a chance to react.

Among the crowd, "%￥##￥..."

Xu Heng, "That is to say, when the external pressure is small enough to be close to zero; the external temperature is low enough to be close to zero."

"This drop of water will suddenly enter a state where gas, liquid and solid coexist."

"To put it more simply, water boils and freezes at the same time."

After Yang Kaixuan finished posting these, he read the news in the group.

Many people have the same question as him, "Will all the water evaporate?"

Xu Heng, "No, it can only exist in the state of solid ice."

Yang Kaixuan, "How to say?"

Xu Heng, "Evaporation or sublimation of water will take away heat, which will further reduce the temperature of the remaining part of ice or water, thus slowing down the speed of evaporation or sublimation."

"So it takes a long time for a small ice crystal to completely become a gas."

Yang Kaixuan was silent.

Most of the people in the group were also lost in thought when they heard what Xu Heng said.

But some people questioned, "This is only theoretical! I can't think of such a specific situation in reality!"

Xu Heng's game was over, and he looked at Yang Kaixuan with a blank face.

"Do you think it's unbelievable?"

Yang Kaixuan, "No, I'm just curious!"

Xu Heng, "There are a lot of ice in the Kuiper belt beyond Neptune in the solar system and the Oort cloud farther away."

"In addition, comets actually have components similar to ice cubes. They have traveled through the universe for so many years, haven't they completely evaporated?"

"If you calculate the speed roughly, it should be more than 400! Wait a minute... let me think about it!"

One second!

Two seconds!

Three seconds!

Four seconds!

Five seconds!

"About 447 meters per second. This speed should be the upper limit of the speed at which a pistol bullet can exit the chamber, but the quality of the water is too small. Even if it can condense into ice and hit a person, it is only a few joules."

Xu Heng's voice stopped abruptly.

Yang Kaixuan posted all of them in the group.

Only then did Xu Heng notice that Yang Kaixuan was sending a message, and it was still a voice message.

Xu Heng, "???"

Yang Kaixuan, "Send your analysis and understanding to the group."

"You don't play games now, so there should be no game protection mode? Will there be a message prompt?"

Xu Heng, "No, I blocked the group."

The corners of Yang Kaixuan's eyes twitched, "!!!"

Xu Heng, "Don't ask me! I'll play another game."

Inviting Yue Pingting, Xu Heng was just about to start.

He received a private chat message.

It was Xiaokang, "Brother! Did you see the skin that was sent to you?"

Xu Heng, "???"

Only then did he remember to look it up, and there really was.

Xu Heng replied, "Thank you."

Receive the skin and start the game with Yue Pingting.

Just put this Xiaokang aside.

Xiaokang was also very confused. Seeing the reminder that the other party had started the game, he began to doubt life, "Is it so realistic? I haven't had time to tell him to play a few rounds together! He started!"

Xiaokang decided to wait for Xu Heng.

He made a script some time ago, but he didn't expect it to be effective.

There are still many people in the live broadcast room who are missing Xu Heng!

Because they firmly believed that Xu Heng was real at that time!

Recently, Xiaokang has been doing a bit of a fake, they yelled, hoping to call Xu Heng to continue duo.

"As long as I can play a game with you, I will definitely discuss it with you."

But Xu Heng didn't give him a chance at all.

After winning this round with Yue Pingting, Xu Heng quit.

Well-off, wait for a lonely.

Just as Xu Heng put down his phone, Yang Kaixuan came over.

"Xu Heng! Many people in the group are looking for you!"

"Ask, why didn't you respond when I added you as a friend?"

Xu Heng, "Didn't I block the group? Besides... Am I not in the group? Why did you add me in private?"

Picking up the phone, Xu Heng looked at it.

Friend application: 40+!

There are more than 50 people in the group!

They all want to add Xu Heng as a friend.

In the group, even the group leader doesn't seem to have this kind of treatment.

Yang Kaixuan, what an envy!

"You are too popular!"

PS: Thanks to [fxinyi] [Yunlu] [Y. 】support!

Ask for all support! ! ! .

Chapter 149

Yang Kaixuan, "Xu Heng, why don't you open the group! Change the mode to show without prompting! Otherwise, if you don't bubble up in the group, many people will add you as friends in private."