Then Mu Rong copied a circuit board: "Next week you will participate in the national semi-finals, the theoretical test questions of the semi-finals are still the national papers, and the experimental questions are arranged by the provinces themselves." Although the theory questions accounted for 160 points and the experimental questions only accounted for 40 points in the semi-finals, I will focus on the training of the experimental part in the next week, which is the weakness of most of you. ”

Next, we move on to the training of the experimental operation.

If Mu Rong lectures on theoretical questions, Shen Qi generally does not learn from large troops, he will ask Mu Rong for theoretical knowledge alone, and then go home to brush up on the questions by himself.

To do physics experiments, you still have to come to the school laboratory, after all, the school laboratory is well-equipped and complete, and the public water and electricity are used.

Some experiments will also use compressed air, who will install compressed air pipes in their homes?

Compared with his own theoretical knowledge, Shen Qi knew very well that experiments were not his strong point, so he joined the army and did experiments.

Mechanics experiments, acoustic experiments, optical experiments, electrical experiments, magnetic field experiments...... Practical operation in progress.

A week passed quickly, and in the blink of an eye, in April, the CPhO rematch was about to begin.

The schedule of the semi-finals is that the theory test questions will be tested first, with a full score of 160 points.

A few days later, the experimental part was examined, and the full score was 40 points.

The total score of theory + experiment is the final score of the semi-finalists.

According to the total results of the semi-finals, each province recommends the best players to participate in the national finals, and generally a province selects the top 10 players in the first prize of the semi-finals to go to the national finals.

The three provinces of southern Hunan, northern Hubei and eastern Zhejiang, which are more competitive, are more powerful, and there will be no less than 20 players sent by them to participate in the national finals.

Some provinces attach importance to the college entrance examination, some provinces attach importance to discipline competitions, and the number of provinces with strong competition and strong provinces with strong material competition is actually about the same, just a few.

Hunan, Hubei and Zhejiang are all very good in mathematics and physical competition, but these three have never produced a double champion of mathematics and physics. The double gold medalists of IMO and IPhO have never been produced internationally.

"Physics, physics, don't be too arrogant, I'm just going to blow you up if I don't do it. 199 points, damn, what I hate the most is to subtract one point from the full score, are you embarrassing me Shen Qi?"

Shen Qi held back his strength, CPhO's preliminary round had already failed, and the rematch must not repeat the mistakes of the past.

"Yo, Shen Qi, stimulated?" Mu Rong chatted with Shen Qi while packing up the experimental equipment.

Shen Qi carefully disassembled a set of glass lens instruments: "It's okay." ”

"Obviously you're stimulated, you have obsessive-compulsive disorder, you will go crazy when you see the imperfect numbers 99, 149, and 199, right?" Mu Rong asked.

Shen Qi shook his head: "No, with a knife level 999, I won't be stimulated." ”

The CPhO rematch will be held tomorrow, and Mu Rong completed the last experimental class before the game.

Shen Qi and Lin Xingyu stayed in the laboratory and helped Mu Rong pack up the experimental equipment.

"Shen Qi scored 199 points in the preliminary round, Lin Xingyu scored 138 points in the preliminary round, two handsome guys, you are all my trump cards. Mu Rong packed up the last circuit board and said with encouragement on her face.

Lin Xingyu said in a panic: "No, no, no, I'm not, Shen Qi is the trump card." I'm a horse boy, Mr. Mu's horse boy. ”

Shen Qi scored 199 points in the preliminary round, and Lin Xingyu scored 138 points, and they ranked first and second in the team respectively. Of course, the gap between the second and the first is a bit big.

Mu Rong has been taking over this competition team for a few months, and she was a little disappointed after the preliminary round, if she hadn't recruited Shen Qi into the team, it would have been difficult for the dozen or so guns under her to hit a country.

Even if Shen Qi is recruited into the team, there is still a certain gap between the overall strength of the No. 2 Middle School competition team and Mu Rong's expectations.

Maybe Mu Rong has too high requirements for herself, after packing up the experimental equipment, she didn't let Shen Qi and Lin Xingyu go, and told them three real questions about the previous CPhO national decision, one each of thermodynamics, optics, and electricity, which are very representative.

"Okay, let's stop here, rest early tonight, and do a big job tomorrow, and go straight to the national decision!" Mu Rong is very confident that Shen Qi will be promoted to the national final, and Shen Qi is her absolute trump card. The biggest deck is Lin Xingyu, and Mu Rong also hopes that Lin Xingyu can create a miracle.

"Well, Mr. Mu, I will definitely work hard, I must advance to the national finals!" Lin Xingyu seemed to have been beaten.

"Teacher Mu also rested early. Shen Qi didn't make any promises, but calmly said goodnight to Mu Rong.

"A few more people enter the national final, and I can also give more bonuses, come on. Mu Rong asked Shen Qi and Lin Xingyu to go first, and she locked the door of the laboratory last.

Shen Qi and Lin Xingyu walked together and walked towards the school's bicycle shed.

"Is Teacher Mu knowledgeable?" asked Shen Qi.

"Yes!" Lin Xingyu replied without thinking.

"Is Mr. Mu's lecture good?"

"Good!"

"Is Teacher Mu beautiful?"

"Beautiful!"

"Is Mr. Mu short of money?"

"Lack!" Lin Xingyu was tricked unconsciously, he found that he had said the wrong thing, and quickly explained: "How do I know if Mr. Mu is short of money?"

"How do I feel that Teacher Mu is short of money?" Shen Qi felt this way, the last time she was alone with Mu Rong, Mu Rong said that her car had no money for maintenance.

It shouldn't be, it can't, the salary and benefits of the teacher in the second middle school are not low, Teacher Mu teaches well in class, and she has the title of Dr. Yan University to support the façade, she goes out and takes a physics training class casually, and she can live a beautiful life.

Lin Xingyu looked east and west, and then whispered: "I heard that Teacher Mu's house and car are all provided by her alone, which is very hard. ”

"You've heard a lot. Shen Qi walked to the bicycle shed, pushed the bicycle to say goodbye to Lin Xingyu, and went home.

The next morning, Mu Rong led the team to the city's No. 6 Middle School, where the CPhO semi-final theory test was held.

The re-examination theory test is also 3 hours, from 9:00 to 12:00.

Jingle bells, 9 o'clock sharp, the exam begins.

After Shen Qi in the No. 6 examination room got the theory paper of the retest, he also quickly scanned the whole question first.

There are a total of eight questions in the theory paper, the first question is a fill-in-the-blank question, and the last seven questions are all calculation questions. The total score of the roll is 160 points.

The first fill-in-the-blank question is a warm-up question and has the lowest score of 12 points.

Although it is a warm-up question, this fill-in-the-blank question with the lowest score is by no means a score question.

"This ...... Sure enough, it was a rematch, and the difficulty increased. "Shen Qi rested well last night, and today he won't doze off, and he won't dare to doze off.

Because of this warm-up fill-in-the-blank question in the semi-finals, in Shen Qi's opinion, it has revealed a bit of the hideousness of sending propositions, and if there is a slight mistake, even Shen Da Boss in the preliminary round of 199 may die.

The question is:

Shen Kuo of the Northern Song Dynasty wrote "Mengxi Writings", which contains: In the sea of Dengzhou, there are clouds from time to time, such as palaces, Taiwan views, city walls, people, chariots and horses, and crown covers, which can be seen in the past. ”

"There is the following formula: n^2(y)=n0^2+np^2(1-e^-αy)"

Let x=0 (x is the horizontal axis), height y=H, n0 is the refractive index at y=0. NP and α are constants and depend on the temperature distribution. ”

"then the trajectory equation for the propagation of the ray in the air is______"

The wood is there, and the question is over here, and I don't even give a schematic diagram.

"This ......" Shen Qi pondered, five minutes passed, and he didn't dare to write.

Obviously, this is an optical question.

Don't think that people who engage in physics competitions don't need to learn Chinese, the purpose of learning Chinese well is to ensure that you can recognize all the words on the topic.

After recognizing the words written by Shen Kuo thousands of years ago, we need to conduct a simple analysis: what did Shen Kuo, the chief scientist of the Northern Song Dynasty, describe Shen Kuo, and can it be explained from a physical point of view?

If you know words and understand some physics knowledge, then it is not difficult to understand this passage recorded by Shen Gong in the Northern Song Dynasty in his collection of essays "Mengxi Bi Tan", Shen Gong described the phenomenon of mirage in words.

I believe that the vast majority of high school students can deduce a mirage from the first paragraph of this fill-in-the-blank question.

But the following description of pure physics, I'm afraid only a few high school students can understand what it means.

No!

The first question is by no means a scoring question!

This is a difficult question, don't be fooled by its humble appearance of 12 points, it has the potential to die!

Shen Qi didn't dare to be careless, he carefully examined the question again, and ten minutes passed.

At this time in the preliminary round, Shen Qi has broken 15 questions in a row.

At this time of the rematch, Shen Qi didn't write a word.

Fill-in-the-blank questions don't give you a chance to explain in detail at all, either 12 or 0 points, there is no so-called step score.

"Hum hum, hum hum ......" Another 5 minutes passed, and Shen Qi smiled and let out a low groan, which was the prelude to his offensive.

Shen Qi found his way of thinking, and even found a rare opponent: "Hehe, hehehe...... The teacher is very naughty, yes, that's right, this is like the style of a regular physics teacher. Shen Kuo, Shen Gong, Ancestor, you are the first generation of scientists in our old Shen family, don't worry, I won't embarrass Ancestor. ”

To put it bluntly, a mirage is an optical phenomenon.

Light is refracted significantly by layers of air of varying densities, revealing distant objects in a fantastical way.

Not many people have seen a mirage with their own eyes, and it takes fate.

But it doesn't matter, we can feel the dream scene of a mirage by doing physics problems.

Shen Qi took a pen and wrote and drew on scratch paper.

Air, there is no direction.

Parallel, like a divided garment.

Thin layers, refraction oozing wings.

My angle, through the chest of the normal.

Flying thetata, forcibly endure the wound.

Escaped, DX's shotgun.

Dear Rays, Beloved Points.

I will be firm and get constants.

……

Ah, what a beautiful piece of physics.

Shen Qi typed the draft, and began to sing as soon as he was typing.

It's not that boring, so why not make it a pleasure.