Mu Rong flicked her fingers and teased the tuning fork.

The Y-shaped tuning fork inserted into the base flutters rhythmically.

Buzz ~ Buzz ~

Mu Rong put a finger to her lips and made a silent gesture, signaling Shen Qi not to speak, the sound wave display was recording the surrounding sound wave changes.

Shen Qi'er listened to the shaking and humming sound of the tuning fork, and visually looked at the screen of the sound wave display, and a set of continuous wavy images appeared on the screen, which was periodic.

Soon, the tuning fork experiment was over.

"Shen Qi, what did you hear?" asked Mu Rong.

Shen Qi replied, "I heard f(t)." ”

"Any rhythmic sound, that is, a sound with periodicity, can be represented by an appropriate combination of harmonics, so what is the coefficient of f(t)?" asked Mu Rong again.

"I don't know. Shen Qi shook his head.

"Don't know?"

"I really don't know, the conditions are insufficient. ”

"Actually, Shen Qi, what you just said, what you heard was not a voice, but f(t). ”

"Of course I know the Fourier series of f(t), but if I find the f(t) coefficient, ......" Shen Qi stared at the screen of the acoustic wave display, trying to find some useful clues.

"Don't look at the screen, your level at this stage is limited, and it's useless to watch it. Mu Rong operated the computer and printer connected to the sound wave display, and the printer began to print paper.

"Senior sister, you know that my level is limited, and you still ask me questions that I can't answer?" Shen Qi was speechless.

"I found out when I asked. Mu Rong said as a matter of course, snickering.

"What about Dr. Yan's demeanor, senior sister?"

"Personable is a description of a male doctor, I hope Shen Qi you can become such a male god one day. Mu Rong spread out the printed drawings on the experimental table, "Shen Qi, you look at the drawings again." ”

There is a clear coordinate scale on the printed waveform diagram, and Shen Qi understands in seconds: "The coefficient a0 is not the amplitude, that is, the ω in 0.001?sinωt is not the frequency, that is, 72000?f(t) is an integral and divided by a T." ”

"So Shen Qi, you still instinctively use mathematical thinking to face physics problems, of course, physics is inseparable from mathematics, but do you understand what I want to say?" Mu Rong straightened up and asked.

"Mr. Mu, what are you talking about is a wave in G major? Why is it called a wave in G major? I can understand that the shaking of the tuning fork collides with nearby air molecules to produce condensation, which creates another thin space in the previous position of these air molecules, that is, sparse. ”

"So what our ears receive is the condensation and thinning of air molecules, and this process is represented by the instrument as a set of wave patterns, and we can expand f(t) according to the Fourier series, use mathematical and physical models to qualitatively and quantitatively explain the nature and mystery of sound, and even use it to create sonic weapons of different frequencies. But I still don't know what role G major played in this experiment?" Shen Qi replied fluently, but still had doubts.

Mu Rong didn't answer and asked, "You don't usually listen to music, do you?"

Shen Qi: "Who said that, I am very fond of music, and I often listen to the songs of Dehua, Xueyou, Essoon, and Jay. ”

Mu Rong laughed speechlessly: "Have you heard of Deldra?"

Shen Qi shook his head: "I've heard of Dedema." ”

"Where's Ravel?"

"I prefer Tengger. ”

"Senior brother, you still have a long way to go from being a personable male god, and you can't just read books and do questions to brush up on the championship championship. You see that the physicists hanging on the wall of this laboratory are all middle-aged and elderly uncles, but they were handsome when they were young, and they are all smart and literary male gods. ”

Mu Rong took off her rimless glasses and sighed, wiped the lenses and put them back on: "C major is too modest, stable and even pale, F major is a tearful smile, only G major is full of vitality and makes people extremely excited." Don't you think physics is most similar to G major?"

"I don't think so. Shen Qi shook his head, he didn't feel that C major was pale and weak, F major laughed with tears, A, B, C, D, E, F, and G major all sounded the same thing to him.

"Well, when I didn't say it. Mu Rong sighed, the female doctor of physics actually has a bit of literary and artistic heart.

"Do you understand this experiment? Mu Rong asked, then pulled the tuning fork from the pedestal.

Shen Qi took the tuning fork and tinkered on the pedestal: "I basically understand, come, I'll do it now, Teacher Mu, you guide me...... Teacher Mu, where is this thing plugged in, why can't it be plugged in?"

"Shen Qi, why are you stupid there! Why are your hands-on skills so weak! Insert them into the small slot, will you?"

"Don't use brute force, there is a switch, if the experimental equipment is broken, Shen Qi, you will pay for it, I will tell you." I've recently died of poverty, and I don't have any money to maintain my car, so don't wreak havoc on me. ”

"Don't drive if you don't have money for maintenance, safety first. ”

“......”

Under the guidance of Mu Rong, Shen Qi practiced this sonic experiment again and again, his practical ability was indeed lacking, and he had not been engaged in theoretical research for the past year, and he had never done experiments.

The tuning fork is in place, and the teacher and student stop talking after the experiment begins, and the conversation between humans affects the results of the sonic recording.

Shen Qi doesn't have to go to the teaching building to take classes, he can soak in the laboratory all day.

The other members of the competition team arrived at the laboratory in the afternoon, and as soon as they came, Shen Qi left.

Shen Qi doesn't like to listen to the CPhO theoretical topics that Mu Rong talked to all the team members, what he is strong at is theory, just go back and brush the mock questions by himself.

After all, Mu Rong has to take care of most of the team members, and when she and Shen Qi are alone, they will talk about more in-depth physical theories, and focus on conventional routines for all team members.

Shen Qi's main purpose in asking Mu Rong for advice was to expand his knowledge, and CPhO was an incidental link.

There are always a few days a month when Shen Qi will return to the third (2) class of high school to make an inspection.

Gu Xiaodan and Chen Xiaoting are especially grateful to Shen Qi, after they studied Shen Qi's mathematical experience, their mathematics scores have made great progress in a few months and can remain stable.

Gu Xiaodan swore that in the next two or three months, he must redouble his efforts and apply for the university in the capital for the college entrance examination.

"I, Gu Xiaodan, have not been convinced by anyone in my life, so I will obey Shen Qi. I was admitted to the university in the capital for nothing else, just to saddle the big guy before and after the horse. The most important thing in being a human being is gratitude. Gu Xiaodan patted his chest and said.

"Traitor, cowardly!" Chen Xiaoting was still angry about Gu Xiaodan, and her body trembled slightly.

"Chen Xiaoting, you can say that I am cowardly, but you must not doubt my loyalty to Shen Qi!" Gu Xiaodan was very angry.

Chen Xiaoting also stood up and did not back down: "Traitor, cowardly, unprincipled!"

Chen Xiaoting has grown to 1.75 meters, and her chest is a little flat and her legs are longer.

Gu Xiaodan is only 1.64 meters, and he lost a few points in momentum: "Forget it, good men don't fight with women." ”

"Gu Xiaodan, shut up for me, let's talk about being admitted to Beijing Institute of Technology and Beijing Chemical Industry, don't brag about it first. Shen Qi scolded Gu Xiaodan and asked Chen Xiaoting when he was done: "What about you, where are you taking the test?"

"I ......" Chen Xiaoting hesitated, wanted to speak and stopped, and finally said: "I haven't thought about it yet." ”

"Xiaoting, don't you have a specialty, can you play the piano or play the piano? I remember this time last year, I said to go to the movies, AA, you said you didn't have time to practice, and then we went to the school gate to have a fast food, you paid the bill. Shen Qi asked.

"That's right, you use imaginary roots, real numbers, Abel groups or something, and drive other clerks crazy. Chen Xiaoting couldn't help but laugh when she thought of this.

Time flies, thinking back on the past, Shen Qi couldn't help laughing: "This is not the point, let me ask you, what kind of piano do you practice?"

"Violin. ”

"Then you can get extra points in the college entrance examination, right?"

"No, you can't. Chen Xiaoting shook her head and explained: "There are no extra points for artistic specialties, and the extra points for the college entrance examination are provincial outstanding students, three good students, the top three in the national finals of the discipline competition, and the results in sports should also be able to add points, as well as the children of martyrs and ethnic minorities...... That's all I remember. In this way, Shen Qi, if you take the college entrance examination, you can get extra points. ”

"Big guy Shen Qi still needs extra points? He is almost 740 in the mock test, and he will add more than ten or twenty points, and 750 will overflow!" Gu Xiaodan couldn't help but look back and say, think about it carefully, this is very unfair, students with good grades can add points, Shen Qi doesn't need extra points at all, it's better to give it to me if it's wasteful.