Learning Demon Cultivation System

Cut into pieces, and slightly rise.

No matter, differential is the sky in fluid mechanics.

Then calculate the electric field strength...

Hmm... It feels like Gauss' theorem is going to be used here...

So finally...

斥力是1/2·ε（Q/4πεr2）2！

Set repulsion and tension equal, solve the equation...

Appeared!

Q=8π√εr3σ!

To put it simply, Li Zheng was already sweating profusely when he actually made it, and Xie Qifan just pinched his watch and pushed the door back to the classroom.

He walked all the way in front of Li Zheng, squinted his eyes and picked up the answer sheet.

Then there was a stare.

"Fuck you, did you really make it?"

"Hmph, isn't it very difficult..." Li Zheng straightened his hair like a lotus, "Can you start telling me about your research?"

"No... this..." Xie Qifan searched for a long time but couldn't find a flaw, and scratched his head irritably, "I didn't finish the question, so this is the first question."

"??!" Li Zheng got up angrily.

Damn you!School ruffian!

"Don't rush, don't worry, the second question is also very simple." Xie Qifen reassured, "Listen well, the second question—please use another method to solve the problem."

"???"

"Broaden your mind, half an hour."

After solving the problems, he closed the door and left.

Li Zheng was quite angry.

Of course he can walk away.

But wouldn't that make the students feel better?

No!

untie!

Hardware solutions!

So, for the first time, Li Zheng rushed to the topic with hatred.

……

Half an hour later, Xie Qifan walked into the classroom again with his watch on his wrist, rubbed his stomach and walked to Li Zheng's desk.

When I picked up the volume and looked at it, I was furious.

"Fuck!! You stupid thing can still think of this??"

"Hmph." Li Zheng wiped his oily forehead, forced a sneer and said, "It's just the principle of least action, common undergraduate mechanics content."

"The third question!" Jie Qifen patted the paper and said with a grim face, "Please come up with another solution."

"Ha...haha..." Li Zheng smiled miserably. Looking at the sunset in the sky outside the window, he slowly took out the hidden papers from his desk, "Sorry, I've already thought of this."

"?!" Xie Qifan was shocked, and his whole worldview trembled.

He took the answer sheet stiffly, only glanced at it, and then dropped his hand.

"This is the first question that forces me to take the principle of virtual work." Li Zheng put away his stationery with a light smile, "I know, you don't want to teach me, so just say, I'll just go."

"You...you..." Xie Qifan looked at the papers all over the floor, scratched his scalp and said, "Please beg me again... Maybe I will agree..."

"No." Li Zheng picked up his schoolbag, his face full of arrogance, not angry.

How can I bow my head to the ruffian when I am a demon?

Xie Qifan's face tilted, avoiding the righteous gaze: "You, just try to say a few nice words..."

Li Zheng frowned and said, "Smoking is harmful to your health!"

"...Alas, since you care so much about the teacher's health, I will forcefully teach you two lessons."

"..."

"Let's go and eat first." Xie Qifen hugged Li Zheng and walked out, "You can probably understand my research at your level."

"Be clear, you insisted on teaching me."

"Hey, talk while drinking."

"drink?"

"Let's go, let's go..." Xie Qifan pushed Li Zheng, only to find a piece of paper stuck to his butt.

He twisted up the paper and looked, startled: "You have prepared a fourth solution???"

"I'm ashamed to say..." Li Zheng clapped his hands and said, "This is the solution I got from outside the venue, and I can't understand it myself."

"You're right if you don't understand it." Xie Qifan took the paper and snorted, "The perturbation method is the method of the Nobel Prize winner in physics. Help your buddy look up the papers, scumbag!"

"Shut up!" Li Zheng was impatient.

"Ah?" Jie Qifan was stunned for a moment, then slapped his head, and hurriedly changed his words, "I see, I'm not a buddy, then she must have checked papers, smart!"

"Ah."

……

A few kilometers away, Lin Yujing yawned, threw away the draft paper, and lay down on the table.

This training session seems to be quite interesting?

Chapter 244 You Sit Down

Xie Qifan led Li Zheng out of the school, found a familiar Sichuan-style snack restaurant, ordered a few plates of strong and spicy dishes, and started chatting while blowing the wine bottle.

As soon as he drank the wine, he chattered more than usual, and the topics became more jumpy.

I was talking about mechanics just now, and suddenly I sprayed quantum.

Spraying and spraying extended to Schrödinger's open marriage, how to dignifiedly have wives and concubines in groups, the red flag at home does not fall, and the colorful flags of the whole city are flying.

Then, with regard to the death of drought and the death of flood, the topic strangely transitioned to "sexual repression of science students", saying that when I was an undergraduate, I wanted to write a paper on "the correlation between sex life and scientific research efficiency". , was rejected, but he felt that this direction was acceptable, so he modified the topic selection and changed it to "the impact of sex life on IQ", and then there was no more.

He still thinks that he can't do this topic, not because it is unreliable, but just to take care of the self-esteem of the majority of science students.

When we talked here, Li Zheng couldn't stand it anymore, and wanted to return the topic to study, so he asked a question about fluid mechanics.

He didn't hesitate to enlighten me when he explained it, and immediately threw a topic to Li Zheng——

【Analysis of Fluid Mechanics in Sexual Life】

Seeing Li Zheng's stiff expression after hearing the topic selection, Xie Qifen admired it very much.

"Look, this topic covers fluid mechanics, biology, and ergonomics. It's a big topic." Jie Qifan laughed while drinking beer, "The key is that this is still a virgin land. You know how difficult it is these days Are you looking for it? I mean the virgin land in scientific research.”

Li Zheng coughed dryly: "There is a man named Bi Dao in the bar, he might be interested in this topic."

"No." Xie Qifan raised his hand resolutely, "Such a good topic cannot be given to Jinghua."

"Are you serious about explaining teacher...does this kind of topic selection have any meaning?"

"Yes, the application prospect is very broad." Xie Qifen gestured, "I'll just say a few things, you can feel it - [automatic erection machine] [suppressing injector] [double expansion ring sleeve]... yes Do you feel it?"

"This... these needs, it seems that medicine has already solved it."

"Can that be the same? Don't you think the physical path is more interesting?"

"Okay..." Li Zheng shook his head and sighed, and said with some hesitation, "Of course it's okay to talk nonsense while eating... But I still care more about the subject you are really working on. These things sound like..."

"Minke?" Xie Qifan smiled and opened a new bottle of wine, "It's okay, let's be honest, I've been sprayed like this for more than ten years."

"No, I want to say Doraemon."

"Haha, it doesn't matter." Xie Qifen took a sip and sat down for half a bottle. Looking at Li Zheng's serious eyes, he finally sighed irresistibly, "I haven't done anything now. If someone is willing to give me the money, I will Maybe they will really go for double expansion rings..."

"..."

"Okay, I know you think I'm annoying." Xie Qifen put down the wine bottle, and quickly took two mouthfuls of food, "Hurry up and finish eating, let's go back and give you a lecture."

"It's not annoying, Mr. Xie." Li Zheng picked up the bottle instead and poured himself half a glass, "It's just that, when I'm with someone like you, I will unconsciously want to absorb the nutrients in physics, and I want to know What kind of research and thought did an early champion like you do.”

"Research, thinking?" Xie Qifan shook his head and took a mouthful of tiger food, "It's still early, Comrade Xiao Li, it's not that I don't want to say it, it's that you shouldn't listen now."

"It's okay..." Li Zheng raised his glass sincerely, "I'm mentally prepared, even if you are really a perpetual motion machine, I can accept it. To tell you the truth, I trusted your knowledge at first, but doubted you Your personality... Now it's the other way around, I trust your personality very much, but I'm starting to doubt your knowledge..."

Xie Qifan was stunned for a moment, but he quickly picked up the wine bottle and touched Li Zheng hard.

"Thank you for your trust." Xie Qifan became serious occasionally, staring at Li Zheng and said, "I will try my best to show you my way of thinking and training methods. But my real physics thinking, sorry, now Not yet."

"why?"

"No way, no way." Xie Qifan put down the wine bottle, his face was no longer beaming, but was covered with a layer of numbness.

He didn't answer what Li Zheng said, even if he said that he was doubling up.

He just took out his mobile phone and walked towards the counter a little crookedly, leaving only the back of an ordinary middle-aged drunk.

On the way back, the two didn't speak a word.

When I returned to the small classroom, it was already around eight o'clock in the evening. In the large experimental classroom next to it, people from the training team were still conducting experiments.

Xie Qifan had no interest in it, so he just went back to the blackboard and started scribbling casually.

Although he was a little drunk and not very interested, what he said was still remarkable.

"A few hours ago, you learned a new way to solve a problem."

"Draw a physical image, then convert it into a mathematical problem, and restore the physical result after calculation."

"This is actually not a new method. Physics problems have been solved in this way since middle school."

"Only now, after mastering microsum and product, there is no longer any obstacle in the transformation between physics and mathematics."

"But this does not mean that all physical problems can only be transformed by calculus."

"In other words, calculus is the dumbest way."

"You know the picture in the computer, it is to divide a picture into millions of pixels, and then describe the color of each pixel to show the whole picture. This is the most stupid method."

"With cleverness, we can record the characteristics of the picture to describe it."

"For example, in a picture, the 100 million pixels in the upper left corner are all black. We only need to record the critical point position and black information."

"And this is the Euler description in fluid mechanics."

"Next, put aside the idea of ​​switching calculus, and let's take a journey of thinking with Lao Ou."

In the next class, different from the initial harsh jump, Jie Qifan gradually became gentle, and added a lot of guidance and examples that are easy for people to understand, making the whole class soft and comfortable.

Of course, where mathematics is involved, it is still very steep, and there is always a sudden "slight moment", and then I can't understand it.

After an unknown amount of time, there was a knock on the door.

After Xie Qifen agreed, the two boys advanced into the classroom, watching Li Zheng reconcile their disputes, with a little sadness in their eyes.

Li Zheng noticed that there were more people gathered at the door of the classroom. Lu Yang was trying to get everyone to disperse, but he couldn't do it.

Xie Qifan rubbed his head, probably because of the alcohol, he asked a little irritably, "What's wrong?"

"Mr. Xie...we also want to hear..."

"You can't just treat him alone and push us all out..."

As soon as these two sentences were uttered, the outside also fell silent.

"Listen." Xie Qifan pointed to the empty seats in the classroom and said, "I didn't ask you to listen, but you should sit."

The two were startled, then overjoyed, and quickly found a seat near the front to sit down.