It's really not difficult,

If Xu Mang was forced to find it difficult, a simple question would be expanded into such a complex issue that it would be so difficult to read that he almost fainted. Who had this fucking problem?

I really want to kill him.

As soon as he finished speaking,

Tong Min and Lu Bo looked at Xu Mang in surprise. Did he just say it was not difficult?

"Xiao Xu?"

"Are you sure it's not difficult?" Tong Min asked with surprise on his face: "If you look carefully, you may have misunderstood. This question is not as simple as you think. From frequency movement to volume expansion, these calculations

The quantity is very large, are you sure it’s not difficult?”

"Yeah?"

"I think it's okay," Xu Mang said with a smile, "Do you have paper and pen?"

"Yes, yes, yes!"

Lu Bo hurriedly took out a black pen and handed it to Xu Mang. He also handed over a writing board with some manuscript paper sandwiched on it.

After getting paper and pen,

Xu Mang started his performance, but this time he planned to write slowly, and while making calculations, he pointed out the mistakes of these people.

"Look"

"According to the photon, when v reaches dv, the volume expands to v(t), so the calculation process is like this." Xu Mang wrote a very complicated calculation process, but as he continued to simplify, this complicated formula gradually became

Got to be simple.

"If we let t(t)r(t)t(t)/r(t), we can still get the distribution form of the black body spectrum." Xu Mang wrote the calculation on the white paper lightly. However, at this moment, the atmosphere at the scene was

Condensed to freezing point.

Tong Min, Lu Bo, Liu Yan and Zhao Pengpeng simply couldn't imagine what was happening in front of them. The problem that had stumped them for more than half an hour had become so simple in the hands of this stranger.

Is this in a fantasy world?

A dream world?

Otherwise how could it be possible!

From an extremely complicated calculation process, with continuous simplification, the fog gradually cleared away, revealing its current appearance. At this moment, the four people present felt that they were about to suffocate, especially Liu Yan, a graduate student from the Department of Mathematics.

Although,

They are all about the calculation process of physics, but every step of his process from complex to simple makes Liu Yan unable to believe her eyes. Are you sure this guy is studying physics? Not a mathematics major?

This mathematical ability

He seems to be almost the same as his professor.

While the four of them were still in shock, Xu Mang had already completed his proof of the time relationship between thermal equilibrium distribution and temperature dependence. The whole process was as smooth as flowing water without any hesitation.

"Done"

Xu Mang asked with a smile: "Is there anything you don't understand?"

""

""

""

The four of them were silent, shocked by Xu Mang's powerful strength.

"Xiao Xu?"

"Who are you?" Tong Min raised her head and looked at Xu Mang seriously: "Are you really a Fu student? Are you ET?"

"Have you ever seen such a handsome ET?" Xu Mang said angrily: "You are allowed to have opinions about me, but please don't question my appearance. Beauty in the prosperous age is no joke. I have a nickname at Fuda.

Do you know what "heart-loving arsonist" means?"

"The man who sets fire in a woman's heart." Xu Mang sighed, glanced at Yang Xiaoman, and said helplessly: "I don't want to bear such a title, but it's a fate that cannot be changed."

"???"

"???"

"???"

So narcissistic,

I really deserve a beating!

Could this guy be a lunatic?

"Ahem!"

"I mean handsome guy Xiao Xu?" Zhao Pengpeng said with a wry smile: "Mr. Heart Arsonist, can you solve the third problem? If the gas above is replaced by particle gas that has no interaction but has mass, and starts

It is in a state of thermal equilibrium at all times. Under the influence of the expansion of the universe, is it actually in thermal equilibrium?"

The words fell,

Four eyes shone on Xu Mang, and the four of them were looking forward to Xu Mang's answer.

Faced with this question, I don’t know what kind of explanation this mysterious Xiao Xu will give. Whether he will get the answer in an instant like the previous two questions, or whether the myth will end here.

Xu Mang didn't look at the question. The third question and the second question were related to each other. Now that the second question was solved, the third question was as simple as picking something out of a bag.

"Talk"

"Have you been tricked?" Xu Mang asked curiously: "These problems should not be solved by graduate students like you. It involves many concepts. The second and third questions are based on heat death.

Said, the cosmological corollary of the second law of thermodynamics starts from this core."

"you"

"What is the name of the professor who provides this kind of topic?" Xu Mang asked.

Hearing Xu Mang's words, Tong Min and Lu Bo's expressions were filled with the word calm. Tong Min said: "Professor Simpudi is an expert in astrophysics and is an alternate member of the Princeton Astrophysics Association."

Xu Mang:???

What?

Alternate member?

Reserve?

It was the first time that Xu Mang heard that the research organization he worked for still had so-called reserve players.

"Is this guy discriminating against China?" Xu Mang asked curiously: "From your perspective, I feel the malice from the person who asked the question. This is deliberately making things difficult for you. With your limited level, it is impossible.

To solve such complex cosmological problems."

Xu Mang's words made the four of them feel a little unconvinced. In his eyes, a graduate student from the Ivy League actually had limited abilities?

indeed

Xiao Xu is very powerful, but Ke Ke can't be so arrogant, right?

This is the issue of relativistic cosmology, and Xiao Xu is engaged in the theory of relativity. Although there are some differences, after all, they come from the same system, and he understands it more or less.

"right!"

"He has a famous saying that he would rather recruit white and black students than Asian students." Tong Min said: "Lu Bo and I are exceptions. We have to teach because our grades are so good."

Xu Mang nodded and said calmly: "Let me help you solve the third problem first."

The words fell,

Xu Mang began to solve this problem. In fact, this malicious professor still had some conscience. In terms of the concept of difficulty, Xu Mang proposed a classification of levels, namely ordinary, nightmare, hell and death. These four

Difficulty level, but there is a level of difficulty that transcends cognitive concepts.

It's called the Xu Mang class

As far as these three problems have been set so far, they have only reached a nightmare level.

"actually"

"For this problem, we must first calculate the number of particles with momentum between p and p+dp in thermal equilibrium under the ideal gas approximation." Xu Mang explained the calculation process in an understated way.

"The chemical potential of e can make it equal to zero. Since the expansion of particles is adiabatic, it is tv^r-1 constant." Xu Mang raised his head, glanced at the four people, and said, "So the existing thermal balance will be destroyed.

"

this

Is this the end?

Not even thirty seconds!

"Little Xu?"

"Is it solved?" Tong Min asked in surprise.

"yes!"
To be continued...