Chapter 8

After the self-study session, Liu Ying walked out of the classroom.

During the break, a tall figure walked in.

Although it's called evening self-study, the courses have already been assigned to teachers of various subjects. From Monday to Friday, every subject teacher has one evening self-study session.

Today is Thursday, and the evening is a physics class. The teacher is named Shen Yong, a Northeast man, a bit fat, with a crew cut. Looking from afar, he looks like a malnourished pear.

"The 2011 second mock exam paper, we will strive to finish it in one period, and you can do the problems yourselves for the remaining time."

Shen Yong had a very loud voice.

"Questions 1 and 2 are original questions we've done before, so I won't talk about them. For question 3, only three students got it wrong, ask those who know how to do it yourselves. For the fourth question, raise your hand if you don't know how to do it."

Shen Yong's teaching has always been like this. The answers have already been issued. If few people raise their hands, he will pass directly and let them ask later. If many people do, he will focus on it.

Xu Qingzhou took out a draft book, "The calculation method of the electric field force doing work on the small ball remains unchanged, but for the potential difference between the two plates of the capacitor C, we need to use calculus to solve this problem."

Read! {

Xu Qingzhou picked a piece of chalk from the paper box and said with a smile: "I have three ways to solve this problem."

Every time his dad went out to drink, his mom's anger level would be maxed out. He wisely didn't continue this topic but asked: "What did you eat for dinner?"

"Looking for materials, self-study."

"This is talent." Xu Qingzhou rolled his eyes, "Besides, what do you mean by secretly studying? Except for yesterday, when have I ever missed out when going online?"

This sentence stunned the whole class.

However, being able to write these problems within a limited framework is actually quite interesting.

This kid, throughout the whole period, didn't see him listen to the class at all, always holding that physics book and flipping through it. If he hadn't gone down to walk around and discovered it was indeed a textbook, he would have suspected he was reading a novel.

!.

"Solved it." Xu Qingzhou closed the physics book.

"Therefore, the work W done by the electric field force on the small ball is the integral of the electric field force along the path of the small ball's movement, that is..."

"Teacher Shen." The two shouted.

For example, for the projectile trajectory, you insist on listing an Euler-Lagrange equation to solve it. A small ball connected to a rope is released freely at a horizontal position, but you use Fourier transform to observe whether this process is smooth and differentiable, and then list the mathematical relationship between the arc and height—that is purely 'taking off your pants to fart'."

Questions of this difficulty might really not be solvable during the exam, but after reading the answers, some people really don't know, some are shy and don't want to go on stage, and others are just waiting for the teacher to call them to increase their sense of presence.

"I'm back... where's my dad?"

"Yes, actually for high school, the reference answer is basically the simplest and easiest to understand. The other two methods are useful, but they seem superfluous." Xu Qingzhou nodded.

"Damn, you actually secretly studied behind my back!" Guo Ziyang stared.

Guo Ziyang had already started mourning for Xu Qingzhou, thinking it was over. When the papers were issued and they were checking answers, Qingzhou was busy confessing and didn't study this question carefully.

"Xu Qingzhou, I know the two methods you mentioned using Maxwell's equations, what is the other one?" Shen Yong asked curiously.

Zhang Yuquan felt happy in his heart. Not to mention letting Xu Qingzhou go on stage, he was usually stumbling when called to answer questions, unable to explain clearly.

During the process of the two pulling, Shen Yong walked over.

Shen Yong's gaze circled around and landed on Xu Qingzhou.

"Question 14, a point charge 'a' is placed on a smooth horizontal surface, with a charge of +2×10^6 C. At a height of 0.1m directly above it, there is a small ball 'b' with a mass of 0.01kg carrying a positive charge..."

Xu Qingzhou threw his school bag back into the bedroom and went to the kitchen to help out.

Ding-a-ling, the bell rang for the end of class.

In order to do research, he seemed to have not taught for more than two years.

Zhang Yuquan, who was originally prepared to watch a good show, suddenly felt a bad premonition in his heart. The other party's eyes were calm, with a kind of unhurried tranquility.

Looking at the expressions of being frustrated below, Xu Qingzhou found that occasionally acting cool was really refreshing.

Zhang Yuquan was expressionless, the envy, jealousy, and hatred in his heart could no longer be described. This highlight should belong to him!

Xu Qingzhou entered the door and saw his mom making dumplings. On the TV, CCTV-8 was playing "Liu Sanjie".

After eating, seeing Wang Xiaping about to collect the bowls, Xu Qingzhou volunteered, "I'll wash them."

"Then you come up and talk about it." Shen Yong pointed to the blackboard.

Standing on the podium, a long-lost sense of familiarity came.

He occasionally liked to call people up to talk. First, it could increase the activity of the class; second, it could make the thinking of the students who spoke more divergent; third, it could refresh the mind. Look, the two drowsy students below were suddenly energetic.

Xu Qingzhou continued: "The first two methods need to use Maxwell's equations and differential equations to solve, which you will only come into contact with in university. They are relatively complex, so I won't talk about them."

Everyone's gaze was focused on Xu Qingzhou.

"Xu Qingzhou, did you solve it?"

Song Yao's expression was also stunned, her pretty eyes staring at the calm boy on stage, a bit curious.

Not long after, the fragrant dumplings were served on the table.

Writing to this point, Xu Qingzhou didn't write anymore, but looked at Shen Yong. He believed Shen Yong knew the following steps.

The third period passed quickly. After school, Xu Qingzhou and Guo Ziyang walked out of school together and parted ways at the intersection.

"The difficulty of this question is a bit over the top, especially the third sub-question. Our whole class was wiped out."

Shen Yong unscrewed his thermos cup, drank some wolfberry tea, and asked: "Has anyone solved this question? Come up and talk about it."

"I'll focus on the third method. First, we need to calculate the electric field strength. According to the electric field strength formula, E = kQ/r, we can get... According to Coulomb's Law and the equation of motion of small ball 'b'..." He talked eloquently, calm and composed.

Although they couldn't understand it, they were greatly shocked.

Guo Ziyang wanted to remind Xu Qingzhou to bring the test paper, but Xu Qingzhou was already 3 meters away.

Using university methods in high school is very incompatible.

Zhang Yuquan's expression stiffened. If you don't talk about it, then what the hell are you saying?

"Went to eat with those fox friends." Wang Xiaping was full of resentment.

What the hell are three kinds? Guo Ziyang suspected that he had been doing too much manual labor and had auditory hallucinations, but felt it wasn't right—he had already abstained from sex for a week.

Xu Qingzhou was indeed a talent. When he participated in the physics competition in his sophomore year, if it weren't for a high fever, he would have almost entered the provincial team. If he worked harder, maybe the national team would have had hope.

Then, the surrounding students saw Xu Qingzhou write a strange formula.

"Qingzhou, when did you learn university physics?" Guo Ziyang endured for an hour and finally grabbed the opportunity to speak.

"Okay." Xu Qingzhou nodded, got up, and walked toward the podium.

Xu Qingzhou took out a physics book and opened it to pass the time.

Song Yao belonged to the type who knew how to do it. She looked at the boy on stage seriously, feeling that Xu Qingzhou was constantly refreshing her impression of him.

"Too lazy to do it, ate an apple, just right to eat a little with you." Wang Xiaping stirred the dumplings in the pot.

"Hmm, well spoken, very detailed." Shen Yong nodded with satisfaction.

No one answered. Most people lowered their heads, worried about being called.

Xu Qingzhou didn't listen much, looked at the question from beginning to end—simple.

Shen Yong nodded and said with a smile: "This method is quite interesting, it's just that the calculation volume is a bit large."

Shen Yong held his thermos cup, surprise flowing in his eyes. He had thought of two kinds.

"That's fine, after the college entrance exam, I'll let you wash them every day." Wang Xiaping patted Xu Qingzhou's hand away.

After accompanying his mom to watch TV in the living room for a while, Xu Qingzhou was driven back to his room to review.

Sitting at the desk, he took out a notebook.

After adapting to high school life, it was time to think about the future.

(End of chapter)