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

"Don't be unconvinced, his knowledge base is not only far above yours, I vaguely feel that he can give pointers so easily, and he has read more books than me."

One is only a teenager!

A 50+ year old!

The difference is decades!

Zhao Gensheng, "Teacher, please stop joking, okay?"

"You have eaten more salt than he has eaten rice, three to forty years! He has read more books than you?"

"Don't eat, drink, or sleep, and have been reading ancient Chinese books since birth? Obviously, this is unrealistic!"

Wu Liubai was not angry either, "." Then have you noticed, what topics did he talk about after he talked with me about "The Poster"? "

"I didn't even mention the title of the book. When it comes to reading the volume of "Mencius" in "Dongshu Reading Secretary", did he think about it? Did he hesitate?"

"He responded as if he was talking to you about how much one plus one equals!"

"Also, when I mentioned "Winning the people with morality" in "Confucianism", he quickly expressed his position and discussed it with Zeng Zi's words."

"If it's you, can you do it?"

Zhao Gensheng opened and closed his mouth, dumbfounded.

The so-called small talk is Wu Liubai's constant testing of Xu Heng's background.

But the more I explore, the more I have no bottom.

The more he explored, Wu Liubai panicked himself.

Everything he could think of, he brought out a sentence or two, but Xu Heng still responded fluently.

"For example, take Xu Heng who is in the second grade of elementary school. I asked him how much one plus one equals, and he answered fluently! I asked about multiplication and division, but he still answered fluently! I was shocked. When I asked about equations and graphic proofs, he was still fluent! I asked about college courses, and he hasn't been wrong yet."

Zhao Gensheng, "!!!"

Wu Liubai smiled bitterly, "It's not that the next knowledge is gone, it's that I have reached the limit."

"As for Xu Heng's limit, I don't know!"

Such an intuitive and easy-to-understand explanation made Zhao Gensheng completely shut up.

He stopped, bowed deeply to Wu Liubai, and also bowed deeply in the direction of Class 3, Grade [-].

"Sorry! I'm stupid!"

Afterwards, he sent a message to Yao Ruiyi, "Apologize to Xu Heng, come tomorrow night, and I will apologize in person again! Thank you."

Yao Ruiyi was surprised that this person who never bowed his head and was so lofty sometimes bowed his head.

She took a screenshot and sent it to Xu Heng.

"Ding!"

In the evening self-study, the originally quiet classroom suddenly rang.

Swish swish!

Many students were working on the questions, and their thoughts were interrupted.

He turned to look at Yue Pingting.

I am most afraid of the sudden silence in the classroom!

Yue Pingting immediately returned the phone to Xu Heng.

"Xu Heng! Your news, Rui Yi sent you."

Ray?

Yue Pingting's voice was low, but the class was very quiet, many people heard it.

"Rey? Who is Rui Yi? Such a familiar name!"

"Wait! Wait! Wait! Rui Yi? Yao Ruiyi... Teacher Yao! Is it Teacher Yao!"

brush……

In an instant, the extremely silent class exploded.

Xu Heng took the phone.

Yue Pingting was completely dumbfounded.

"So... who is Rey?"

Xu Heng, "?"

"It's the one who sent you a WeChat message! I just got a message, and you have a reminder. I saw that the other party's name is Rui Yi."

Xu Heng opened it and looked at it, it was a screenshot.

"Oh, it's the head teacher!"

Yue Pingting, "!!!"

"I'm dead! I actually called the class teacher by name in class! I'm dead!!!"

"Why did you note that the head teacher's name is Rui Yi!"

Xu Heng, "It's his ID, it's Rui Yi, I didn't make a note."

Yue Pingting cried miserably, "Then you are so sweet, and also note the three words head teacher!"

Xu Heng gave Yue Pingting a white look, "Don't worry about it, it's a big deal."

"Then (Zhao Wang's) is the head teacher! I am socially dead."

Xu Heng, "Then I'll talk to the teacher in charge."

Just when she was about to post, Yue Pingting said, "Don't! Don't!"

Xu Heng was still typing.

"Xu Heng! Please don't! Please! Please don't!"

Xu Heng's message was sent out.

Yue Pingting, "!!!"

Xu Heng rolled his eyes, "It's not about you, I'll reply to her message."

Yue Pingting was still worried, "Then show me a look."

Xu Heng raised his finger and knocked on his forehead, "Personal privacy."

He and Yao Ruiyi were talking about Zhao Gensheng.

Yue Pingting stretched her head and looked at Xu Heng eagerly.

She is afraid!

Yue Pingting was very flustered when she called the class teacher's name in front of the whole class.

After Xu Heng said a few words, he handed the phone to Yue Pingting.

Yue Pingting, "Good Xu Heng, can I have a look? Please! Good Xu Heng, good brother! Good brother!"

Xu Heng is a few months older than her.

Xu Heng rolled his eyes, "Look, you don't trust me, you are so sad."

After viewing, nothing was mentioned.

Yue Pingting immediately put on a face to please Xu Heng.

"Don't be angry, Xu Heng, good Xu Heng, you don't remember villains..."

Xu Heng lay down and got ready to sleep.

"Don't sleep, get out of class is almost over."

Xu Heng, "Why don't you sleep?"

"Eh...the physics teacher left a question, I don't know how to do it, you can teach me."

"Fine!"

Put away the phone, Xu Heng looked at the question.

topic:

Take the magnetic induction intensity of the homogeneous magnetic field as B, the direction is perpendicular to the surface of the paper, and its boundary is shown by the dotted line in the figure. The arc ab is a semicircle, ac and bd are collinear with the diameter ab, and the distance between ac is equal to the radius of the semicircle.

A beam of particles with mass m and electric charge q (q>0) enters the magnetic field from point c perpendicular to ac in the paper, and these particles have various velocities.

Interactions between particles are ignored.

What is the moving time of the longest moving particle in the magnetic field?

A(7πm)/(6qB)

B(5πm)/(4qB)

C(4πm)/(3qB)

D(3πm)/(2qB)

Yue Pingting pursed her lips and stared at Xu Heng.

Xu Heng looked at the pictures on the test paper, and went to find a pen.

This question is very simple for him, but to tell others, he needs to organize the language.

In addition, there is more than one way to solve this question.

So a little delay.

Yue Pingting, "Why don't you watch it first?"

A few classmates around me also looked sideways, "Will Xu Heng know?"

"Seeing that Xu Heng has been silent for a while, isn't it?"

Yue Pingting stared, "Don't talk nonsense, give him some time."

Before the words fell, Xu Heng said, "There are two methods, the special value method and the chord cutting method, which one do you want to hear?".

Chapter 70

Yue Pingting was taken aback for a moment, and couldn't speak fluently.

"What, what? What method? There are two other solutions?"

The students next to me also had expressions on their faces, "True or false! Are there so many methods for this question left by the physics teacher?"

Accidentally, the voice became a little loud, and was heard by the students in the front rows.

Many people looked sideways.

"Several ways? Are there really?"

They are also curious.

Yue Pingting, "Why don't you tell me all about it."

Xu Heng, "Let's talk about the special value method first, and let's look at the four options..."

Yue Pingting panicked, "Wait, did it start so soon? Wait for me! I'm not ready yet."

Take out the pen and paper.

Everything is ready.

"Okay, let's get started!"

Xu Heng was a little speechless, "It's not a problem, don't be like this."

Before Yue Pingting could speak, the students next to her yelled, "Be yourself, Xu Heng!"

Xu Heng cleared his throat.

"For the special value method, first look at option D, which is the largest. This period can be regarded as (2πm)/qB, so this time can be converted into 3/4 period."