Scholar’s Advanced Technological System

The three days of the mathematical modeling contest will just wash away two big lessons.

Although it was a dedication, but it was not good to take the leave in consideration of the first class, Lu Zhou decided to send the fake article personally, so that he would not bother the squad leader to do it.

Looking at the information given by the administrative administration department, the name of the big teacher is Li Rongen, which is a highly qualified old Professor. After asking the phone number in the school group, Lu Zhou called first and confirmed that the teacher was in the office before taking the fake note.

After knocking on the door, Lu Zhou walked in and placed the fake strip on the desk to explain his intentions.

“Leave off?” Looked at the fake note, Professor Li took off the reading glasses and looked up laughed. “Your name is Lu Zhou?”

“Yes.” Lu Zhou nodded.

Professor Li laughed and said, “That line, I will test you two questions. If you solve it, I will approve your fake article.”

Is there such an operation? !

Lu Zhou is dumbfounded.

“How? Fear?” Li Rongen asked with a smile.

“No,” Lu Zhou fixed his mind and shook his head. “You are going to teach you.”

“The first question, take it,” he took an A4 paper to Lu Zhou’s hand, and Li Rongen smiled at Lu Zhou, calm and easy going. “How much can I write, I want to see the process.” “”

Even the questions are ready? !

Lu Zhou always feels that this guy is premeditated, otherwise how to explain why this question has been printed on A4 paper?

However, even if he guessed a point, Lu Zhou did not say anything, picked up the A4 paper and started reading the questions.

1 Find the average lifespan of the U238 core (ln2=0.693).

2 Find the mass of U238 in the nuclear submarine (in kg, take 2 digits)

】

After reading the title, Lu Zhou sighed softly.

It is worthy of being the “Professor Li” who was named “The Four Devils of the Court” by the previous Seniors. Is this the problem?

In other words, the next big thing class will be opened next Monday, and it is really no problem to take this nuclear physics knowledge of playing the super-level ball.

“Would you like to find a place to sit and count?”

“No, just here.”

After taking the pen and draft paper handed down by Professor Li, Lu Zhou stood beside the desk, frowning and thinking for a moment.

Physics is not really an area he is good at.

However, after a summer vacation, he was impeccable!

About five minutes later, Lu Zhou’s brow was loose, and the nib shua shua shua moved.

[The decay law of radionuclides: N=N0e^(-λt)

】

Writing these two lines of calculations, Lu Zhou’s eyes flashed slightly.

He has successfully turned the physics problem into an Advanced Algebra issue.

Next, it is to break through one by one!

First question!

The nib swam on A4 paper.

Substituting data is available, t=6.49*10^9 years.

】

Scanning the A4 paper, Professor Li Rongen raised his eyebrows and an interesting expression appeared in his eyes.

I did not notice the change in the expression of Professor Li, and Lu Zhou, whose focus was highly concentrated on paper, began to answer the next question.

[The problem can be solved by the dry information, the number of high-energy photons generated by decaying to U234 at dt time is -dN·n0=n0λNdt

The efficiency of photons passing through the steel plate is n1, and the number of photons passing through the steel plate during dt is dN1=n0λNdt·n1.

The number of photons entering the detector…

The number of signals generated in the detector…

Calculate the number of U238 in the submarine and calculate the number of U238 cores from this.

】

Lu Zhou substitutes all the data and calculates the number of U238 cores in the submarine N=7.456*10^25.

However, just as he was preparing to bring N into M=N*238u and complete the final blow to the enemy’s spring, Professor Li Rongen suddenly spoke.

“Okay, count you too.”

Lu Zhou 😕 ? ?

He was not happy at all.

What is it that I have passed?

I have counted here, you can’t wait for me to finish talking!

“Professor, I haven’t finished yet…”

“Everyone has counted this step, and you can find a junior high school student,” Li Rongen said with a smile. “If you want to finish it, just follow it.”

The atmosphere of the problem was ruined, and Lu Zhou was speechless.

Can not stand the entanglement of obsessive-compulsive disorder, he still wrote the results at the end.

Answer M=29.634kg, take two digits about 30kg

The steps are correct, and the result is no suspense.

Lu Zhou painted the title of Perfection.

“Would you like to listen to the second question?” Li Rongen said with a smile.

Although Lu Zhou wants to say “do not want to”, but thinks that Professor has not approved his own fake article, helplessly said: “You say it.”

Li Rongen laughed and continued: “Don’t be nervous, the second question is very simple, you will tell me, The Kennan formulation of the second law of thermodynamics.”

Hearing this problem, Lu Zhou relaxed.

Originally, he thought that the second question of the Professor would be a problem that he couldn’t write at all. He beat him and warned him not to be proud of himself. As a result, he did not expect that Professor Li did not press the routine at all, so he simply let go. He is.

In general, there are two main expressions of the second law of thermodynamics, one is the famous Kelvin expression, and the other is the expression mentioned by Clausius in thesis of 1850.

As for Kennan’s expression, it is a relatively new expression that has recently emerged.

When you look at the materials carefully, you will not miss them.

which is–

“For a system with a given energy, material composition, and parameters, there is such a stable equilibrium state: other states can always be achieved through a reversible process.” Like the back text, Lu Zhou retells this expression.

“Not bad.” Li Rongen praised nodded.

The textbooks used by non-physics majors do not mention this more advanced expression in the text, but they will be mentioned in the appendix. Students who are not interested in Physics are not going to be there when they graduate.

If Lu Zhou is so clear about this secluded knowledge point, it is enough to prove that he has thoroughly immersed in the entire “University Physics” textbook.

After this shallow and deep investigation, Li Rongen can now confirm that this course for undergraduate non-physics professional students, there is really nothing to teach him.

It seems that Old Lu does not brag, this kid is a personal!

In fact, it is a joke to the young people that they have answered the questions correctly.

Since yesterday, he has approved dozens of fake articles in the mathematical modeling competition. Will it be such a fake?

Even if Lu Zhou can’t answer it, he will sing up at most two sentences, and he will still approve it.

Signed on the fake strip, Li Rongen pulled out the name list in the drawer and drew two hooks on it, saying it in the tone of the elder.

“Lu Zhou.”

“what happened?”

“Is there any plan to study?”

Lu Zhou thought about it and said in an uncertain tone: “Yes.”

Who is good about the future?

However, the intuition of Professor Li is obviously not as sharp as Old Lu. He did not hear the uncertainty in Lu Zhou’s tone. Instead, he praised the nodded and continued.

“The physics department of Nanda is also a top standard in colleges and universities across the country. In terms of modesty, even if Peking University and Pelican are tied for the first place, if it is specific to the research direction, superconducting Physics and strong associated electronic systems, and condensed states. In the fields of physics and material design, they are not as good as us. If you are interested in physics, you can come to me when you are studying. Our carbon nanotube lab needs the top talents in the mathematics field.”

this is……

Is it implied that I will report to his graduate students later?

Lu Zhou knows whether or not cry or laugh, he is just 2nd year, far from the postgraduate.

But in any case, this is the kindness of the teacher.

Lu Zhou said sincerely: “Thank you teacher.”

Li Rongen smiled nodded: “Okay, take a fake bar. This kind of game has the opportunity to participate more. If you can’t do it, you can pay attention to the opportunity of the next year. If you go to 3rd year next year, ask.” I, ask you Teacher Tang, you can.”

Lu Zhou smiled and expressed his gratitude. He didn’t talk much more. He quickly quit with this hard-won fake note.