"How long have you been listening?" asked Teacher Mu.

"I listened to two questions, and it was a bit low. Shen Qi replied.

Teacher Mu smiled and didn't get angry: "Really?"

Shen Qi said: "Let's just say that the submarine question written on the blackboard, because the inlet and outlet areas are the same, so the flow velocity is unchanged, the effect of ampere force is to increase the pressure, and then considering the conservation of energy, it does not take too much calculation to find V1 and V2." It's too simple, CMO is eight streets harder than CPhO. Mr. Mu, I don't mean anything else, and I'm not arrogant, anyway, I am very sad when I see those very low topics. ”

(CPhO: National Physics Competition for Middle School Students)

"The two questions you just saw are really low. Teacher Mu continued to smile

Shen Qi was speechless: "This ...... Low, you still write it out for them? Our school's competition team isn't that bad, is it?"

"Shen Qi, let me tell you, the CPhO preliminary round is also at this level, the first question just now is the CPhO preliminary round real question, and the second question can almost be included in the CPhO preliminary round question bank. ”

"Then the CPhO preliminary round belongs to the nature of national participation, right?" Last year, Shen Qi participated in the provincial competition of the Mathematics League, which was equivalent to the national preliminary competition of CPhO, when his mathematics grade was level 3, and it was only after peeling off the three layers of skin that he won the provincial championship of the Mathematics League.

Now Shen Qi's physics level is also level 3, and the questions of the CPhO National Preliminary Competition are like pediatrics to him, and he can calculate the answer with no effort.

"The superiority that mathematics gives you is really incomparable, and I would like to send you a friendly invitation on behalf of the competition team to go in and learn from each other?"

"Okay. Shen Qi snapped his fingers with his right hand and snapped, and snapped his fingers again with his left hand, but he didn't snap.

"You're not left-handed, practice more. Teacher Mu snapped his fingers with his left hand, like setting off a firecracker, and then made a gesture to signal Shen Qi to follow her into the laboratory.

"There are so many physics teachers who are really good. Shen Qi followed Teacher Mu into the room.

As soon as the two entered the door, more than a dozen members of the competition team did not know each other, they all knew Shen Qi, and the math boss ran to our competition team to smash the field?

"I'll tell you something. Teacher Mu said to all the team members, and then glanced at Shen Qi: "This is Shen Qi, everyone is welcome." ”

Bang Bang Bang!

Applause rang out.

"Hey, Shen Qi is here to smash the field, why should we applaud and welcome?"

"Or a friendly match?"

The players were talking.

"Do you need to introduce yourself, Shen Qi?" Teacher Mu asked Shen Qi beside him.

Shen Qi asked the dozen or so players in the audience: "Do you need it?"

"No, no, no. ”

"I understand everything. ”

The players all shook their heads and waved their hands.

Shen Qi said: "Hello everyone, then I won't say more, everything is in plain sight." ”

Teacher Mu said to Shen Qi, "Go down and find a place to sit down." ”

Shen Qi walked to the seat next to Lin Xingyu and took a seat.

"Big guy, what's the situation?" Lin Xingyu couldn't wait to ask.

Shen Qi said with a smile: "Visit each other and communicate friendly." Holding back Lin Xingyu's words, Mr. Mu is ready to make a big move. ”

Lin Xingyu looked at the blackboard suspiciously, wondering what was going on.

Teacher Mu knocked on the blackboard: "Which student got the answer to this submarine question?"

Brush!

Brush!

The players in the audience raised their hands one after another.

"It seems that there are no obstacles for you in the CPhO preliminary round, maybe my teaching is too conservative. Teacher Mu looked at Qi Qi's raised arm and said, "Bai Lingye, you come to the stage to give the answer." ”

A boy takes the stage and writes his answer on the blackboard.

Mr. Mu walked to the multimedia console on the side of the blackboard, turned on the power supply, and operated the multimedia teaching system.

While waiting, Shen Qi asked Lin Xingyu: "How long has Mr. Mu been in the competition team?"

Lin Xingyu: "I just came here not long ago, before the Spring Festival, she took us a training class before the Spring Festival, and then we had a holiday. ”

"I remember that the competition team was led by Mr. Yue before?" asked Shen Qi.

"Teacher Yue suddenly suffered a cerebral hemorrhage and was hospitalized. Lin Xingyu showed a terrifying expression.

Ms. Yue is approaching the age of 60 and is about to retire, and is a senior teacher at Nangang No. 2 Middle School. Shen Qi also felt terrible: "This ...... You guys who don't make it happen have made Teacher Yue angry and have a cerebral hemorrhage. So before the full handover, Teacher Mu rushed to work, she came up with such a simple question for you to do, is she trying to find out?"

"Maybe, but Mr. Mu is very knowledgeable and powerful. Lin Xingyu said adoringly.

"She's only taken you a training class and a half, and you're already knowledgeable, so she's very powerful?" Shen Qi asked rhetorically.

"She's a female doctor in physics. Lin Xingyu's eyes were full of little stars.

"Oh yes, is it so hanging?, which direction of the doctor?" Shen Qi glanced at Teacher Mu, who was operating the multimedia system, she was still a doctor of physics?

"Astrophysics, the study of the universe. "Lin Xingyu admires Teacher Mu, don't want it.

"Amazing, Sect Master Mu. Shen Qi's understanding of Mr. Mu has been further deepened, and the female doctor who studies astrophysics has gone to a folk middle school to solve the low question, what secrets are hidden behind this?

At this time, the boy on the stage finished answering, and Teacher Mu said, "Yes, all right, Bai Lingye, go back to your seat." ”

Shen Qi's preliminary observation showed that the overall strength of this school competition team was okay, at least Lin Xingyu and Bai Lingye had the strength to advance to the national semi-finals. The CPhO competition system is the preliminary round, semi-final, and national final, which is similar to that of the CMO, and after several rounds of testing, the best players are finally selected to enter the national team and participate in IPhO.

"Please watch the big screen carefully. Under the operation of Mr. Mu, a screen slowly fell in front of the laboratory, and an animation was projected on the screen.

In the center of the picture is a small red ball marked with a black letter H.

It is clear that this small ball represents the hydrogen atom.

There is a strangely shaped emitter at each end of the hydrogen atom, and the emitter constantly shoots blue rays to attack the red hydrogen atom.

Click.

Multimedia speakers emit the sound of objects freezing and cooling.

The small red balls representing the hydrogen atoms gradually change color, and the spheres become lighter and lighter in color, eventually turning pale blue.

This concludes the demo animation.

Including Shen Qi, all the students in the audience watched it with relish.

Only a very small number of cutting-edge scientific researchers in the world can personally participate in microscopic experiments at the atomic level, and most of them rely on teaching materials or science fiction films.

"I showed you the laser cooling of atoms, do you understand?" asked Mr. Mu.

"Demonstrate again, Mr. Mu. The students in the audience proposed.

"Okay, one more time. Mr. Mu replayed the laser cooling demonstration animation of atoms.

In this demonstration, Mr. Mu explained synchronously: "Laser cooling is a technology that uses the interaction between lasers and atoms to slow down the movement of atoms to obtain ultra-low temperature atoms, and a few countries in the world have mastered this technology, among which the United States is in the leading position, and China is also catching up." Mr. Steven Chu, a Chinese scientist, won the Nobel Prize in Physics in '97 for his theoretical research on this technology, and he was hired as a foreign academician of the Chinese Academy of Sciences. ”

"Then my question is, in the atomic frame of reference shown on the screen, there is a minimum value of temperature due to the recoil effect, please calculate this minimum value. Mr. Mu finished the second animation display and released a new diagram, which is a schematic diagram of a plane atomic reference frame.

"This ......" The students in the audience were dumbfounded, just now it was obviously the difficulty of the preliminary level of the physics competition, but now it is directly promoted to the Nobel Prize level in physics, Mr. Mu is very conservative, once he is radical, he will go to heaven.