Force, several common forces, synthesis of force, decomposition of force...
"It's not electromagnetic related knowledge, but I can't be biased... Otherwise, it will definitely affect my final score. Even if the knowledge is not what I want, I have to endure it."
Baili Qingfeng pursed his lips and continued to read.
Interaction of forces, friction, static friction, friction coefficient, resultant force, centrifugal force, vibration and resonance...
"This is quite interesting."
Baili Qingfeng suddenly stopped when he saw this as if he was chewing chicken ribs.
In the early 19th century, when an army marching in uniform steps passed a stone bridge, it collapsed the bridge through the principle of resonance.
Baili Qingfeng looked at the description in the book.
A country woman played the flute, which caused the caterpillars on the fruit trees to die one after another. This was because the sound of the flute transmitted vibrations to the caterpillars through the air, causing the caterpillars to vibrate. Because the frequencies of the two were similar, the caterpillars' internal organs resonated.
Rupture causes death.
"If we can study this, we might be able to create a boxing technique, a secret technique, that uses vibration waves to cause resonance in other people's internal organs and tear their internal organs apart."
Baili Qingfeng himself also has a good foundation in physics. To create a secret method based on the principle of resonance, he must also understand vibration waves.
There are many types of vibration waves, not to mention the basics of transverse waves and longitudinal waves. We also need to understand the wave period, wavelength, and wave speed. The relationship between the three can be expressed by υ=λ/T.
This simple formula applies to both electromagnetic waves and light waves.
After watching some waves, Baili Qingfeng quickly saw something else he was interested in.
Sound waves.
Most media in the world can transmit sound waves, but different media have different transmission speeds.
For example, the speed of sound in air is 332 meters per second, in water it reaches 1450 meters, in copper it reaches 3800 meters per second, and in iron it reaches 4900 meters per second. However, the reason why Baili Qingfeng is interested in these is the sound wave.
Vibration rules.
Regular and periodic vibrations can be called music, which is peaceful and pleasant to the ear, while irregular and non-periodic vibrations can only be called noise, which can drive people crazy.
But this statement cannot be summarized in one word.
After all, music has three elements: pitch, loudness, and timbre.
"Sure enough, people who love music should learn more about physics, so that they can see the essence of music clearly."
Baili Qingfeng finally began to read this textbook with gusto, no matter how much he chewed it.
A brand new door is slowly opening to him.
…
Shuiyun Yayun.
After a week, Baili Qingfeng came to this musical instrument store again.
This time, except for Gu Lingying, Qin Lanshan, and Yun Shengyan, there were no other guests on the second floor.
"Brother Qingfeng, you are here."
Seeing Baili Qingfeng, Qin Lanshan was the first to greet him: "My dad heard your music and thought you were very talented. He wants to meet you. Is it possible?"
Baili Qingfeng thought for a while and agreed: "Okay, let's just stay here next time."
"Okay, little brother Qingfeng, that's what we've settled on."
Qin Lanshan said happily.
"Senior Qingfeng, what do you think of pop music?"
Gu Lingying asked with a smile.
She was wearing an antique dress today, with a white wing-shaped hairpin on her head. Her smooth hair fell naturally on her shoulders, and she had a sky blue belt tied around her slender waist. She looked pure and elegant.
"Actually, I think music does not need to be divided into pop music, classical music, electronic music, and dance music. As long as it sounds good and touches people's hearts, it is all good music."
Baili Qingfeng said.
"Yes, as long as it sounds good, I like to listen to it regardless of genre."
Qin Lanshan said with a smile.
Next, we listened to songs, played the piano, played the flute, chatted, and discussed some relevant knowledge. The day passed quickly.
When it was time to say goodbye, Gu Lingying glanced at Baili Qingfeng and seemed to be hesitant to speak.
After a moment, she stepped forward and said: "Senior Qingfeng, I want to ask you to do me a favor. I wonder if you have heard of the music program 'Tianlai'."
"TV music show..."
Baili Qingfeng thought carefully: "The last time I watched TV... it seemed like a few months ago, the news was playing at home..."
Qin Lanshan on the side was stunned, a little unbelievable: "Brother Qingfeng, 'Sounds of Heaven' is the best and most popular music program in the whole of Xia. You, an industry insider, don't know this?"
"Industry insider? Singing is just my hobby, I'm not considered an industry insider."
Baili Qingfeng said honestly: "As a student, I spend most of my time reading and studying."
"..."
When Qin Lanshan heard Baili Qingfeng's reasons, she didn't know how to refute it.
Students should really read and study well.
"But if you have anything to say, I'll see if I can help."
"It's like this. One of my senior sisters, Su Weiwei, was supposed to be the first place in 'Sound of Heaven', but due to internal manipulation, she only got fourth place and didn't even make it into the top three. She planned to hold a small pop music concert to prove herself.
After learning about this, the teacher strongly supported it and recommended the two of us to be guests to perform Swordsman and Heaven and Earth, but... I don't know if senior Qingfeng has time."
"I'm just an amateur music lover. I will definitely be nervous in this kind of situation. Forget it."
Baili Qingfeng said.
"That's it..."
Gu Lingying was a little lonely.
But Qin Lanshan came up and said pitifully: "Brother Qingfeng, please agree and help Sister Weiwei. You don't know, no matter whether you are first, second or third in that issue of 'The Sound of Heaven',
They are far from Sister Weiwei's opponent, but they relied on internal operations to wipe out Sister Weiwei's first place. It's really annoying. Sister Weiwei just wants to take revenge for this concert, and, music
It's not a concert, there aren't many people, the invited audience is less than 200 people, most of them are well-known people in the industry, people who love music and understand music, you will definitely have something in common."
Yun Shengyan, who was beside her, thought for a moment and then said, "That girl Weiwei is indeed very talented. It would be a pity if she was suppressed like this and fell into a state of decline."
Baili Qingfeng glanced at the three of them, and finally paused for a moment on Gu Lingying, and said with some hesitation: "According to you, this is your senior sister Su's battle to achieve enlightenment. If I didn't play well...
…”
"Senior Qingfeng, I believe in your level."
Gu Lingying looked at Baili Qingfeng and said with full trust.
"That's right, little brother Qingfeng, you can do it."
Qin Lanshan clenched her fists and encouraged.
"That's good."
Baili Qingfeng responded and said to Gu Lingying: "Then let's work hard together."
"Yes, let's work together. We can practice more when we have time."
"Speaking of practice, I have gained some new understanding of music recently and discovered a lot of new knowledge. This knowledge is all precious, but I am still recording it. I will give it to you when I finish recording it.
look."
Baili Qingfeng said.
"Wow? What kind of music secret book is it? Can you become a music master after reading it? I really want to read it now."
Qin Lanshan quickly came up, bringing with her a burst of girlish fragrance.
Not only Qin Lanshan, but also Gu Lingying and Yun Shengyan also came forward impatiently.
Baili Qingfeng saw that several people were in high spirits and didn't hide anything.
"In that case, I will show you my new baby."
While talking, he directly took out a book...
Charles University Physics Textbook.
"Look, the knowledge in this physics book is priceless. When I was studying physics recently, I found that through the study of sound waves, I can have different insights into music, and gain a more thorough insight into the essence of music that touches people's hearts. Let's study it carefully.
, look here..."
——————
(There is no limit to learning. The older you get, the more you realize that the amount of knowledge you master is far from enough. When you have free time, you can really read more books, regardless of genre. This is a kind of spiritual enrichment. Of course, the premise is that you still read books after working hard every day.