Sitting in the first row, Li kept staring at the blackboard, the color of struggle on his face was constantly changing, and his heart seemed to have gone through countless repeated struggles, and finally had to compromise with the result.

Su Yun's algorithm is correct, and every step has enough scientific evidence to support his algorithm, so that people can't refute it.

However, this is not the end of it, Su Yun continued: "Then now that we have figured out the most fundamental process of this problem, then we can start calculating its specific cycle. ”

"As we said earlier, two simple harmonic motions can actually be synthesized into a uniform circular motion, so we can use the period of uniform circular motion to find the period of our problem. ”

Without waiting for Su Yun to say, the student Li in the audience took the lead in saying: "The period of uniform circular motion t=2π√mk, and k is exactly 43πρgm, and the formula of substituting the surface can get t=2π√(34πρg)." ”

After classmate Li said this, the people around him also began to pick up the pen and start to count.

It can be said that they are worthy of being students of Peking University, most of them calculated the results in less than a minute, but when they calculated the results, they all opened their mouths in surprise.

Su Yun looked at them and smiled slightly: "That's right, you should have also discovered that this cycle has nothing to do with the mass of people, it is only related to two factors, one is the density ρ of the earth, and the other is the number of gravitational fields g, so we don't need to ask for this cycle, it is a fixed value in itself!"

"That is, if you make a hole in the earth and jump into it from one side, you will just get out from the other side, and the time of this process is certain, I have already helped you find it, this time t is about: 5077 seconds, about 84 minutes. ”

At this time, the entire classroom was filled with onlookers, not only the seats, but also the surrounding corridors and doorways, but the scene was surprisingly quiet.

Some of the physics students in front of me were okay, and they took the pen and calculated it over and over again, which was surprisingly interesting.

However, for some people in the back and outside who are not in the physics department, it is like listening to a book from heaven.

Punch a hole in the earth and jump in from one side, and the fuck can you get out from the other side?

What is this!?

Several old professors in the back row were crying and laughing, but they didn't know what to say.

Because Su Yun's solution is indeed correct, every step is supported by sufficient scientific evidence, and there is nothing wrong with the calculated results, but if they really want to say it, they always feel that something is strange.

"Poof..."Student Li, who was sitting in the first row, suddenly laughed, didn't care about the eyes of others, looked at Su Yun and said, "Su Yun... No, Dr. Su, you're a real genius, I'm convinced. It's my fault for offending you before, I'm sorry. ”

As he spoke, he suddenly stood up from his position, and then bowed deeply to Su Yun.

Su Yun also smiled, shook his head and replied, "I don't think you should say this to me, but to your teacher, after all, the teacher in this class is not me, but the one behind you." ”

Student Li was slightly stunned, walked behind him without the slightest hesitation, bowed to the young female teacher, and said, "Teacher, I'm sorry, I was bad before, please forgive me." ”

......

Su Yun pulled Yan Su out of the classroom, and many students cheered and applauded behind him.

A student like classmate Li, in fact, Su Yun is not disgusted at all, relatively, he may prefer this kind of point more than ordinary students.

Compared with those who can only blindly do problems and constantly solve problems, he prefers the kind of students who will go around in circles to think crankily and constantly think about new problems.

It's like this problem of the earth piercing a hole, in fact, it is very suitable for application to high school physics problems, not only will it not lack interest, but the knowledge points involved can deepen the impression of every student.

Of all the knowledge points that Su Yun talked about before, is there any point that is difficult?

Not really.

All the knowledge points he just talked about can actually be found in the textbooks of physics books.

But it was such a question, but the teacher present failed to answer it for the students, is this really the student's problem?

Just when Su Yun was thinking about these haves and haves, a person suddenly ran behind him, and his name was still called in his mouth.

"Dr. Sue, wait a minute!"

Su Yun stopped, turned around and saw that the person chasing him was none other than the previous classmate Li.

"Dr. Sue, huhu... Wait.. Wait a minute!"

The boy who came from a distance finally ran in front of them, panting with his hands on his knees, and his slender body looked like he was not very good at sports.

He looked up with some difficulty, and a few beads of sweat the size of a grain of rice slid down his cheeks on his forehead. It's hard to imagine that Su Yun and they have only left less than a hundred meters, how he is tired like this at such a distance.

"Sue... Dr. Sue, please wait a minute..."

Su Yun looked at him with some curiosity and asked, "Eh.." What's the matter, do you have any more questions?"

However, the young man just shook his head, took a long breath, and said, "Dr. Su, please take me as an apprentice!"

Take me as an apprentice...

I'm a disciple...

Be a disciple...

Su Yun looked at the young man with a surprised expression, and couldn't help but draw three black lines on his forehead.

It was the first time he had heard someone in the real world say that he would take me as an apprentice, and it was a little too untrue, and he asked a little confusedly, "Uh... That classmate Li, what did you just say, can you say it again?"

Student Li looked at Su Yun firmly and repeated: "Please take me as an apprentice!"

Su Yun wiped the non-existent sweat on his forehead, and replied speechlessly: "What, classmate Li, I don't accept apprentices, so you can find another master." ”

However, he still did not give up and said: "If you take me as an apprentice, whether it is money or anything else, as long as you say it, I will definitely be able to satisfy you!"

Su Yun was a little speechless, and replied: "Little fart, how old are you, don't be like an adult, you want to use money to solve everything, not to mention, do you think I am poor in money, master?"

Su Yun glanced at Yan Su, and secretly thought in his heart: Even if I am short of money, my daughter-in-law is here, can I still be short of money?!

Yan Su turned her head and glanced at him, not knowing if she could read his thoughts, just smiled at him.

When Li heard this, he was a little entangled.

On weekdays, no matter who he asks to help, as long as he gives more money, most things can be solved, but it doesn't seem to have much effect here in Su Yun.

I heard that he made more than 100 million yuan a month by speculating in stocks, this rumor should not be false, so he must not be short of money, since this is the case, what should I do?

For the first time in his life, Li fell into deep thought. Take a hundred plating on the latest chapter of "I Am a Genius Star Claw Book House" to read for free for the first time. I want to talk about "I Am a Genius Star" with more like-minded people, pay attention to "excellent reading literature" on WeChat, talk about life, and find a confidant~