Xueba's Sea of ​​Stars

Chapter 152 Carnot Theorem
It was detected that Xiaobai had a bladder blockage problem, and the treatment cost more than 800 yuan, which was all paid by Gu Ningshan. Judging by her leisurely swiping her mobile phone to spend after seeing the price, Wu Bin felt that this child...

Should be a rich man.

After listening to the doctor's advice, the two left the pet hospital together.

Looking at Xiaobai in the cat bag, who had a much more comfortable expression, Wu Bin asked, "The doctor said he still needs to take medicine every day, can you take care of him?"

Gu Ningshan nodded: "I know a senior who is willing to help adopt stray cats. I'll find her later, and when Xiaobai is ready, I'll go to the group to help him find someone to adopt."

"Oh, all right."

"By the way, why did Xiaobai approach you on his own initiative? I've been feeding him for several days, but he ran away when he saw me approaching him." Gu Ningshan's small face was full of anger, and her words were full of dissatisfaction.

Wu Bin: "I have always been attracted to cats since I was a child, and most cats like to cling to me."

Looking at Wu Bin with a casual tone, Gu Ningshan was full of envy.

Sitting on the return bus, Gu Ningshan suddenly chatted with Wu Bin about the relationship between the thermal value of Carnot's theorem and the second law of thermodynamics, which aroused Wu Bin's great interest.

So the two deduced the two usual expressions of the second law of thermodynamics from the use of Carnot's theorem and the first law of thermodynamics, revealed the equivalence between Carnot's theorem and the second law of thermodynamics, and gave a new formula of thermodynamic entropy and Maxwell relation. The derivation method of Carnot's theorem is summarized, and the application value of Carnot's theorem is objectively evaluated.

"In fact, there is no need to use the state function S, and many problems can already be solved by relying on Carnot's theorem and the first law of thermodynamics."

Wu Bin took out a notebook and a pen from his schoolbag, and said while writing: "Specifically, the injection system works between two heat sources with a temperature difference ΔT→0 to complete a reversible Carnot cycle. In this way, p- In the V diagram, an infinitely flat quadrilateral is formed..."

"Are you a contestant?" Gu Ningshan asked suddenly, looking at Wu Bin who looked excited.

"Well, I participated in a physics competition." Wu Bin nodded, and then went on to say: "If the volume change ΔV → 0, then the quadrilateral will be reduced to an infinitesimal parallelogram, which is easy to calculate. "

Gu Ningshan nodded, and asked: "Have you learned how to use Carnot's theorem to calculate the heat released by a reversible battery during isothermal charging, and to balance the internal energy density of a gas that radiates photons?"

"Eh? Is there such an app!?" Wu Bin stared at Gu Ningshan with glowing eyes.

"Pfft...hahaha." Seeing Wu Bin's eyes, Gu Ningshan suddenly laughed.

"What's wrong?" Wu Bin asked inexplicably.

Gu Ningshan shook her hands and said, "It's nothing, it's nothing, I just think you resemble someone."

After speaking, Gu Ningshan found that the car had arrived, so she pulled Wu Bin out of the car together.

"Thank you for your help today. I have to send Xiaobai to my senior." After getting off the car, Gu Ningshan took the cat bag as Wu Bin and said.

"Oh... that's fine."

Seeing Wu Bin's eyes full of reluctance, Gu Ningshan smiled and took out her phone and said to Wu Bin: "Why don't you add me on WeChat? If you want to see Xiaobai, I can send you some photos."

"Okay." Wu Bin nodded, and scanned Gu Ningshan's QR code.

After adding friends, Gu Ningshan waved to Wu Bin and left, while Wu Bin was full of melancholy.

"I don't know if you can explain the application of Carnot's theorem in the field of batteries on WeChat..."

Seeing that it was almost time for dinner, Wu Bin felt that he had almost finished feeling about the University of Science and Technology, so he took out his phone and called Professor Song Nanfeng.

"Hi, Wu Bin, are you here?" Song Nanfeng answered the phone and asked.

Of course, before Wu Bin came, he told Song Nanfeng that he would come today, but he didn't say the specific time.

"Well, it's at the school gate."

"Okay, wait a moment, I'll come and pick you up."

About 10 minutes later, Song Nanfeng rode a yellow bicycle to the school gate.

After saying hello to Wu Bin, Song Nanfeng took him to the bicycle rental point on campus of HKUST and borrowed a bicycle for him, and then began to visit the campus.

"Professor Song, I have a question. Why are there so few students on HKUST campus..." Cycling past the Mushroom Pavilion, Wu Bin couldn't help asking curiously after finding that there were still no students inside.

Song Nanfeng smiled after hearing this, and said, "Want to see a place with a lot of people? OK, I'll take you there."

When passing by a small road called Hongzhuan Road, Song Nanfeng introduced to him that it was built according to the school motto of HKUST: "Red colleges go hand in hand, theory and reality blend".

"Sounds like a sense of mission."

"Hey, you're getting to the point. The University of Science and Technology was built as soon as it was proposed, and the school started that year. The students and teachers really have a strong sense of mission."

While visiting and chatting, Song Nanfeng took Wu Bin to a playground that covers a large area, and here, Wu Bin finally met those USTC students he "heart and soul".

Looking at the athletes galloping on the playground, Song Nanfeng introduced to Wu Bin: "Our University of Science and Technology...although we don't have a major in sports, and we don't have sports specialties, we have won many awards in various sports competitions. Last year Our dragon boat team also broke the 9-meter course record of C700 University."

The term C9 colleges and universities, Wu Bin still heard it from Li Yan, which is composed of Jingbei University, Jinghua University, Aurora University, Shanghai Jiaotong University, Jinling University, Zhejiang University, Huaguo University of Science and Technology, and Heerbin University of Technology , Daxing Jiaotong University, a nine-school alliance composed of 9 top universities.

Various substantive activities are often carried out between the alliances, such as exchanging students, holding seminars, and conducting summer camps.

After listening to Professor Song Nanfeng's words now, Wu Bin understood that there seemed to be a lot of sports competitions among the nine schools.

"This is really...unexpected." Wu Bin sighed after thinking about it.

"Why, I thought that all the students of HKUST were nerds? The kind that would bump into trees when walking?"

"That's not true." Wu Bin waved his hand, "It's just that the top students in my imagination are indeed quite weak."

"Hahaha." Professor Song Nanfeng laughed for a while, "In fact, everyone practices sports for a better body, because only then can we do academics better."

"Well, it makes sense." Wu Bin nodded.

"I think your body is quite strong, suitable for our school." Song Nanfeng squeezed Wu Bin's arm muscles and said with a smile.

Wu Bin smiled, but didn't speak.

Song Nanfeng was not in a hurry, and added: "There are three places with the most students in HKUST. One is the study room, and the other is the gym and gymnasium. Oh, by the way, our gym is free."

"What about the third one?" Wu Bin asked.

"Of course it's the library, do you want to check it out?"

As soon as Wu Bin heard it, he immediately became interested, stepped on the bicycle and said eagerly: "Then ask the professor to lead the way."

(End of this chapter)