Dinner was still instant noodles, and this time I finally put poached eggs in them. This made Lin Fan's life even more difficult, but today was a happy day. For the first time, he used knowledge to make money.
To be honest,
Lin Fan felt a little guilty in his heart. In his eyes, knowledge was used to create human happiness, but in the end... he used it to cheat the equipment and currency in the game.
This feeling of guilt comes and goes quickly...
When he finished eating the braised beef instant noodles and drank a bottle of ice-cold Coke, the carbon dioxide accumulated in his stomach caused the gas to flow upward from the stomach due to the spasm and contraction of the diaphragm. In medical terms, it is called... burping. After a long belch,
Lin Fan collapsed on the chair.
"Ah~"
"So comfortable!"
"Instant noodles and Coke are indeed the most perfect combination. I won't accept any objection!" Lin Fan took a long breath and turned to look at his door. He didn't know what was being eaten in the refrigerator... uh... the refrigerator.
Maybe he's eating some electricity.
a brief rest,
Lin Fan began to help Liang Xuchao solve their problem of calculating the expected values of momentum and kinetic energy of free particles.
Lin Fan had already seen the complexity of this problem before. It could not be calculated using the momentum expectation value calculation formula, so... it was necessary to find another way and find other solutions. This naturally did not trouble Lin Fan.
As one of the best geniuses in the world, I thought about it for ten minutes and came up with a solution.
There are two kinds!
The first is to use trigonometric function formulas.
Its sinkx=1/2i(e^ikx-e^-ikx), coskx=1/2(e^ikx-e^-ikx), from which we can get A/4(e^ikx+e^-ikx
-e^i2kx-e^-i2kx), which shows that the state of the particle is actually a superposition state formed by the linear superposition of five plane waves. Then according to the principle of superposition state, the particle momentum at this time has five possible values.
value.
They are p1=hk, p2=-hk, p3=2hk, p4=-2hk, p5=0... From this, we can get the expected value of momentum and kinetic energy of the particle. Of course... it is not over at this step, because there are
The normalization condition of the wave function, the probability of possible values of particle momentum must be equal to 1.
At this point...add A=(πh)^-1/2.
Finish!
In fact, it is over now. Lin Fan solved Liang Xuchao's problem in ten minutes. But there is another way, but it requires the use of Fourier transform, and then applying the sigma function relationship, we can get the particle
momentum and kinetic energy.
only...
Lin Fan was worried that it was too complicated and Liang Xuchao's group might not be able to understand it, but think about it... could they understand it using trigonometric functions? I guess they wouldn't be able to understand it either?
Thinking of this,
The second solution was directly used to solve the problem of calculating the expected value of momentum and kinetic energy of free particles.
It took less than ten minutes, and Lin Fan solved everything perfectly. He used two solutions, and almost each one was the most perfect. If he had to choose one... Lin Fan might choose to use the triangle.
Function formula is used to solve particle momentum and kinetic energy, which is more pure and rigorous.
"Ouch~"
"Have you not used your brain for too long? Your brain hurts after using it for a little while." Lin Fan stretched out, silently opened his computer, entered his account number and password, and then logged in to his character and started playing in Ai
Have fun in the world of Xerath.
The hour hand reached the eleven position,
Lin Fan turned off the computer, washed himself briefly, and lay down on the bed. When he thought that he could possess a legendary weapon, he felt a little excited, and gradually... he entered a dream.
...
The next morning,
A monotonous and boring day has begun.
Lin Fan learned from the previous lesson and deliberately left the house ten minutes early in order to avoid meeting Liu Yun'er, but... he never expected that the other party actually thought the same way.
The moment the door is opened,
Each other's eyes intertwined, the atmosphere dropped to freezing point at this moment, and time had frozen.
"..."
"..."
The two of them seemed to have agreed, neither spoke, closed the door silently, and then walked towards the stairs, Liu Yun'er walking in front and Lin Fan following behind, although they were in the same frame.
Inside, they kept a safe distance from each other.
During this awkward and tense time, Lin Fan smelled a fragrance...a fresh light fragrance.
"You are using Chanel's modern COCO perfume, right?" Lin Fan said seriously: "Actually, this perfume does not match your image. It represents depth, sexiness, positivity, and interprets the other side of a woman's personality. It is low-key and elegant compared to Baroque.
Gorgeous, like the impact of black and white contrast."
"If you like light fragrance, I recommend you to use Miss Dior Eau de Toilette. As Dior's first perfume, it shows an infinite passion for flowers. I think..."
Halfway through Lin Fan's speech, Liu Yun'er, who was walking in front, suddenly stopped and turned around to stare at him... A grown man actually knew so much about perfumes. What on earth did he want to do? It was definitely not something good.
matter!
at this moment,
Many pictures appeared in Liu Yun'er's mind, and then Liu Yun'er was so angry that she was so angry at the pictures in her mind.
"Scum!"
Drop a word angrily,
Liu Yun'er left directly and disappeared from Lin Fan's sight.
Why?
Is this a scumbag?
I didn't do anything the hell!
Lin Fan didn't know what pictures Liu Yun'er had made up in his mind. In short... He was very angry now. He kindly recommended a perfume suitable for her, but the other party didn't appreciate it and called himself a scum... Alas, this world
What happened?
Finally arrived at the unit,
Lin Fan directly turned on the computer, inserted the USB flash drive... and sent a document to Liang Xuchao's QQ.
Less than ten minutes,
Liang Xuchao's phone call came, with a slightly confused tone.
"Brother Lin?"
"Is that right?" Liang Xuchao looked at the content sent and asked Lin Fan, "Is it reliable?"
"Remove the '?'... and the only thing left is reliable!" Lin Fan said angrily: "Don't forget to give me a black wind sword, and also promised me the 20,000 gold coins to be mailed to me in the evening.
I have no money recently, and I can’t even afford medicine.”
"..."
Liang Xuchao slid the mouse wheel and asked curiously: "What if it's not reliable? Who did you ask to do it?"
"Why so many questions?"
"Why are you asking for a hundred thousand?" Lin Fan said helplessly: "Don't ask if there is such a thing, in short...it's very reliable!"
The words fell,
I hung up immediately,
Lin Fan didn't want to dwell on this matter for too long. As a man... he had to be more decisive.
at the same time,
Liang Xuchao looked at this document for a long time...not knowing why. Then he opened the class WeChat group and asked about other people's situation.
result,
Bad news one after another!
or...
Wait any longer?
Let time brew for a while, if it doesn't work...
Liang Xuchao glanced at the incomprehensible content on the screen and sighed.