My subject turned into a beautiful girl

"Being tsundere is great, and being sarcastic is essential! Cute girls like physics students are the most lovable!"

An Yi was thinking to herself, completely forgetting that she had previously complained that no one would like the arrogant version that was being demoted.

Who would point out mistakes and correct them when they're being sarcastic? If this counts as sarcasm, then he'd rather live with this kind of sarcasm every day.

That said, he's arrogant and likes to be sarcastic, but he can genuinely point out shortcomings and help people improve. Plus, he respects talented people, looks down on mediocre ones, and is a representative of "physics"...

Why does this person's label look so strangely familiar when put together?

An Yi thought about it carefully and suddenly realized.

Tony Stark! A gender-swapped Iron Man! When did she arrive?

So many thoughts flashed through his mind in an instant, only to be quickly replaced by the information from a blueprint. An Yi subconsciously compared this blueprint, which had been corrected by [physics], with the design blueprint in his hand.

The drawing was quite detailed. An Yi didn't know much about mechanics, so he could only roughly recognize that it was a cross-sectional drawing of a mechanical component that looked like an engine. There were also many numbers marked on it, which should be dimensions... Several of the dimensions were visibly turned red in his field of vision.

This change did not stop there. Under An Yi's watchful eye, the design image came to life, and it began to automatically generate and evolve into a complete model!

This model is completely visualized for An Yi. He can even control himself to zoom in, zoom out, and rotate the viewpoint at will to see every detail of the model, just like entering the legendary 3D virtual projection interface.

Is this also a change brought about by physics?

An Yi watched this scene with some surprise. Before he could figure out all the functions of this field of vision, the model, which was a one-to-one replica of the original dimensions on the blueprint, began to move.

At this moment, the content on the light screen next to him continued to change—

Physics knows you won't believe her if she just points out the problem, so she decides to demonstrate it to you, leaving you speechless and unable to refute the mistake you made—a mistake even a monkey wouldn't make.

"Yes, yes..." An Yi was completely unfazed by this level of "attack".

First of all, he was quite certain that even a Nobel Prize-winning physicist would be considered "a slightly smarter individual among monkeys, but still a monkey after all" in the face of physics.

Therefore, as someone who failed high school physics, I guess I'll just have to accept being a monkey!

Secondly, these blueprints weren't designed by An Yi. The physics team is clearly mocking "Sister-in-law" Zhou Yinshuang!

The thought of this beautiful iceberg being mocked as a monkey... made him feel quite amused.

Thus, An Yi was able to watch the model enter its working state with a completely "peaceful" mindset.

At the beginning of the work, the model did not have any problems, and everything seemed to be normal.

Immediately afterwards, two constantly changing values ​​appeared directly above the model. One value was labeled with the rotation speed, and the other with the temperature. Both were continuously increasing.

Soon, An Yi noticed the changes that were taking place.

In fact, he didn't even need to notice it, because the part that was changing had already been circled in red light, and anyone with eyesight could see it.

Those are the fan blade-like parts on the shaft, and they're...elongating?

Thermal expansion? The term popped into An Yi's mind.

If someone who has received compulsory education doesn't even know this physical phenomenon, then he's really letting his teacher down.

So, the problem with Zhou Yinshuang's design drawings actually lay in this aspect?

In that case, it's no wonder the physics department mocked it as a "basic error," because it does indeed seem a bit basic...

However, even as the rotation speed and temperature above the model reached their peak and then gradually decreased, the model itself did not exhibit any problems.

Although the impellers extend outwards evenly, they remain stable within the gap range, maintaining a clear and safe distance from the casing, and run smoothly until the end.

Eh?

An Yi was taken aback.

There wasn't any problem, was there?

Before he could react, his view refreshed. This time it was still the same static model, with the rotation speed and temperature displayed above it. Another simulation had begun.

Unlike last time, the rotational speed increased rapidly in a very short time, and the impeller also underwent a much more significant change in a very short time.

Their edges warped abnormally, and this deformation, which was far greater than the last one, allowed them to successfully touch the shell, then collide and shatter!

Fragments of the impellers struck the casing that encased them, and the flying fragments, at extremely high speeds, shattered the remaining impellers. Amidst the flying sparks, the sturdy outer shell was instantly torn apart by the storm of metal fragments from within!

As if to further demonstrate the dire consequences of this foolish mistake, a small figure bearing An Yi's name appeared beside the model in the field of vision. The flying debris, after shattering the shell, completely pierced through him—a honeycomb-like saturation attack that would trigger trypophobia just looking at it…

Hey, there's no need to hate someone to this extent!

An Yi felt a phantom pain all over her body, as if she had actually suffered that kind of injury.

Fortunately, he knew that even if something went wrong with this thing, it wouldn't harm him, because the design blueprint belonged to his sister-in-law, Zhou Yinshuang…

Damn it, this isn't much better!

If you don't know about this kind of thing, that's fine, but if you do know, you should definitely remind them.

This has nothing to do with whether Zhou Yinshuang is pretty or not, or whether she is the sister-in-law. Even if they were just complete strangers, An Yi would still bring it up.

But how exactly should I say it?

Wait, what if this is just a question?

An Yi suddenly realized that she seemed to have some preconceived notions.

My sister-in-law never said she was going to make this thing!

The precision of the blueprints and the speed and temperature mentioned earlier don't seem like something a high school student should be able to handle.

"Um...you're not going to build this thing, are you?"

An Yi thought for a moment, then looked up at Zhou Yinshuang and decided to ask a question, just to put his mind at ease.

As he expected, given his sister-in-law's personality, she would only glance at him expressionlessly and without any change in her eyes, and then say nothing.

Zhou Yinshuang looked at him quietly, but to An Yi's surprise, she actually responded.

Although this was not an answer to An Yi's question.

"You can understand it."

This statement contained no doubt whatsoever; it was a statement, and she seemed...very certain of it.

For a moment, An Yi felt a chill run down her spine, as if she had become transparent in those calm eyes, and all her inner thoughts were exposed.

"No, I don't understand!" He shook his head decisively in denial.

Zhou Yinshuang looked at him quietly again, and that familiar sense of pressure returned, but An Yi remained quite steadfast and showed no intention of changing his mind.

Because he believed from beginning to end that he was telling the truth, that he genuinely couldn't understand the design drawings in his hand. He only understood the "accident video that even a fool could understand," which was presented to him by physics—but how could he explain that?

The silence between the two did not last long.

After all, the world wouldn't stop in time just for the two of them. It was shortly after the school bell rang, and people were coming and going, calling out to their friends and preparing to go out for dinner...

The sudden appearance of two motionless "still scenes" in such a GIF would be too jarring!

Why?

Just as An Yi was about to give up, Zhou Yinshuang spoke up again.

It's impossible to tell from her tone and expression whether she's serious or not, but thinking about it carefully, the fact that her older brother has been talking to her for two years and only today did he finally get a word in edgewise... is enough to show how serious she is right now.

"Why? Why?" An Yi was taken aback.

"Why are you asking me if I want to make this?" Zhou Yinshuang patiently answered the question.

"That was just pure curiosity?" An Yi answered instinctively.

"lie."

Zhou Yinshuang's reply was brief and swift... and showed no courtesy.

What, are you some kind of lie detector that's become a human? How can you be so sure!

An Yi complained, but remembering her original intention, she didn't persist and simply gave up.

"Well, although I can't understand this design, something just feels off, you know, it's like... an intuition!"

Zhou Yinshuang looked at him quietly for a while, then suddenly asked in a low voice, "Ramanujan An?"

"Why did you tell me all this, big brother! Okay, it would be strange if you didn't tell me... um... more or less? But this isn't quite the same as my sensitivity to numbers when doing calculations. I mean, let me think how to explain it. Never mind, I can't explain it!"

For a moment, An Yi's mind raced, trying to come up with a seemingly reasonable explanation, but ultimately, limited by his knowledge, he wisely chose to give up the struggle.

It's okay. If science can't explain it, we'll use metaphysics. I am Ramanujan An! This applies to mathematics as well as physics!

Anyway, they can't do anything to me!

The moment the thought of giving up arises, one suddenly feels a vast and boundless world.

"I just feel that, looking at this design drawing alone, don't you think these blades are a bit too close to the outer shell?"

An Yi turned the blueprints around and gestured on the design drawing with his hands.

"I have a feeling, just a feeling, that if they start spinning and accelerate rapidly, they could very well collide with the outer shell, causing a near-explosive disintegration!"

This statement sounds incredibly amateurish. Even An Yi himself felt that the overall explanation was too dry and unconvincing after he finished speaking.

Zhou Yinshuang listened to his explanation quite attentively, and after An Yi finished speaking, she stared intently at the place he was gesturing, lost in thought.

Compared to her composure and calmness, An Yi was quite uneasy.

His "sixth sense of being stared at" made him vaguely aware of the gazes that were being cast at him from all around.

Apart from the eldest brother, there are not many people who can communicate with the sister-in-law for such a long time, and the sister-in-law obviously said a lot.

"As a younger brother, having such an interaction with my sister-in-law while my older brother is away, won't I be punished afterward? Although I have a clear conscience and the truth will prevail, public opinion doesn't change based on the facts!" he thought somewhat irrationally.

Just then, Zhou Yinshuang suddenly raised her head.

This sudden change also drew An Yi's attention. He met her gaze and was startled again.

"The temperature gradient generated by high speed in a short period of time leads to non-uniform thermal strain, and the thermal stress forces the blade to bend thermoelastically... resulting in a non-containment failure. I took thermal expansion into account and designed for the coefficient of thermal expansion, but I forgot to consider the safety redundancy for non-steady-state uniform expansion."

Zhou Yinshuang said what was probably the longest sentence she had ever said in class.

For once, her usually calm gaze showed a rare flicker of emotion, which stunned An Yi. In that instant, it was as if an iceberg in the girl's eyes had suddenly shattered, revealing turbulent waves beneath.

"that,"

An Yi blinked, finally snapping out of her daze, her eyes filled with a clear ignorance.

"I don't know what those terms you mentioned actually mean, but they sound a lot like what I was just feeling..."

"..."

Zhou Yinshuang fell silent.

This time, the way she looked at him felt very familiar to An Yi. He thought about it carefully and realized that the most similar look was the one his older brother gave him after he first learned about his "ability to calculate numbers".

It seems his English name and nickname, Ramanujan, is now officially confirmed.

Fortunately, An Yi was mentally prepared for this, and to be honest, with this buff, he no longer needed to rack his brains to explain some unreasonable things... He could just rely on his intuition for things he couldn't explain!

Talent is an irrational thing. As for geniuses, one less of you won't make a difference, and one more of you won't make a difference either.

However, the silent atmosphere made An Yi extremely uncomfortable. After fidgeting for a moment, seeing that the matter he had kindly reminded him of had been completed, he finally remembered the important matter.

"Oh, right, my brother told me to tell you she'll be back in about 5 minutes at the latest, so please wait for her a little while..."

"it is good."

Zhou Yingshuang nodded slowly, paused, and then said, "Thank you."

"It's nothing! Sister-in-law, just put in a good word for me with my brother later..."

Seeing that this unexpected incident was finally coming to a relatively satisfactory end, An Yi was quite elated.

"no."

"Huh?"

"This is confidential."

Zhou Yinshuang spoke calmly, shaking the design drawing to make sure An Yi understood her meaning before putting it back into the folder and then into her backpack.

I owe you a favor.

"Huh?"

An Yi was caught off guard.

What's going on here?!

What happened to the promised happy ending? The sudden turn of events backfired.

The ideal ending was that the younger brother would help his sister-in-law solve the problem, then receive her "pillow talk" support for his older brother, and thus rise rapidly in rank...

But how did it turn into "the younger brother and sister-in-law's little secret + private favor"?

This is a speeding headlong rush towards the Three Knives and Six Caves to light the sky lanterns, without looking back even for a second!