Xueba, I beg you to go and escort him quickly!

The roommates had protruding eyeballs and opened their mouths so wide that their jaws could drop to the ground.

"What! What? What did you say?"

"My ears are not good, you say it again?!"

Liu Yixiang, "Student Xu Heng, it took more than an hour to do two test papers, high school biology and high school biology. After that, I handed in the papers ahead of schedule."

What the hell!

Holy shit! !

What the hell! ! !

The roommates are all "fucking" in their heads.

If their brains can open barrage, then the whole screen will be "Fuck Fuck Fuck Fuck..."

They were all covered by these two words. Other than that, all kinds of things in my mind could not be bought.

They almost didn't retract their jaws, and looked at Xu Heng, "Really, is it true?!"

Xu Heng waved his hand, "It's all in the past!"

Everyone, "!!!"

Suddenly, a classmate screamed, "I remember the head teacher mentioned it! Why did Xu Heng not get a perfect score in nine subjects! It seems to be in ten subjects!"

"Could it be this!"

"Xu Heng, you got a perfect score in the biology test paper of the third year of high school?!!!"

The other students wondered, "Is there such a thing?"

"I remember it!"

"I seem to remember it too!"

"Fuck!!!"

"Xu Heng! You are too deep! You are too strong!"

"God! I will ask you to promise God in the future!"

Liu Yixiang looked at the crowd and gasped, "Xu Heng, aren't you being too low-key!"

"If it were me, I think I would take it out and make them face it."

Xu Heng cares?

He was not interested in participating in the national revision meeting, let alone taking an exam.

Xu Heng, "Stop bragging, let's get down to business, what's the question?"

"Feng Nianshang said you are good at physics, I have a question to ask."

"In addition, I also want to know about your answering skills!"

This is a smart guy!

People don't ask questions, just ask how to learn!

Maybe this is the difference between geniuses and ordinary students!

Liu Yixiang handed the question to Xu Heng.

topic:

Two small balls a and b, which can be regarded as particles, are connected by a light rod to prevent them from being in a smooth hemispherical surface.

It is known that the mass ratio of balls a and b is (square root 3): 1, and the degree of thinness is (square root 2) times the radius of the spherical surface.

When the two balls are in equilibrium, what is the angle θ between the thin rod and the horizontal plane?

A.45

B.30

C.

D.15

There are not many words in the title, and the pictures given are also very simple.

There is a pole in a semicircle, and there are two points ab and ab on the two sections of the pole.

Xu Heng watched.

Roommates also came over to read the questions.

The next second, the roommates closed their eyes, "Spicy eyes! I can't understand it at all!"

"This is the subject of the third year of high school. It's too difficult for me to go!"

"What the hell? I understand the truth! I can understand the topic, but... I just can't do it!"

But that's it?

I can understand it, but I can't!

Liu Yixiang looked at Xu Heng.

Xu Heng said slowly, "Since you want to learn the way of thinking, you want to talk about your Siluo."

As a top student, Liu Yixiang naturally has his own way of solving problems.

He took out a pen and paper, and wrote while talking.

"Assuming that the elastic force of the thin rod on the two balls is T, the force of the small balls a and b is shown in the figure, and the direction of the elastic force of the ball on the two balls points to the center of the circle, that is:

Therefore, the direction of FNa is upward to the right, that is, β1=90-45-θ=45-θ

The direction of FNb is upward to the left, that is, β2=90-(45-θ)=45=θ

Both balls are affected by gravity, the elastic force of the thin rod and the elastic force of the spherical surface. A vertical line passing through O is drawn to intersect point ab at point c. If the radius of the spherical surface is R, then abc is similar to the triangle with the force on the left side; abc is similar to the force on the right side. Triangles are like; these can be obtained from geometric relations. "

Liu Yixiang wrote densely on the paper, and there were a lot of formulas and equations.

"Finally, a=45 can be obtained, and then..."

Not only are there so many formulas and equations, but also graphs!

Very detailed picture!

If this is an exam, a set of multiple-choice questions will take 10 minutes, so what else is there to test?

The onlookers found it difficult just to see Liu Yixiang's problem-solving ideas!

"Give it to me, I must give up!"

Liu Yixiang smiled bitterly, "If it were me, I would have given up during the exam too! That's why I came to ask for advice..."

Look at Xu Heng!

Swish swish!

The dormitory became quiet, staring at Xu Heng.

……

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Data is dead again?This is more sad than a girlfriend leaking air!

Save the children, please....

Chapter 81

"Xu Heng, are you okay?"

"Yeah, this is the subject of the third year of high school after all!"

"It involves high school physics, will you?"

"Say something..."

"Xu Heng? Hey, Xu Heng~, don't pretend to be dead?"

"Don't be ashamed!"

"But it's understandable. After all, it's a senior year topic. If you don't know it, you won't!"

"Hehehe, isn't it a pity that senior Liu Yixiang's ice cream is?"

The roommates were a little worried about Xu Heng, and some even started to comfort him.

Xu Heng was silent for a moment, then the corners of his mouth raised, very confident.

He cleared his throat, ready to speak.

Liu Yixiang sat upright and pricked up his ears.

"I probably thought about it for a while. There are three relatively simpler methods than what you just wrote."

"Equivalent center of gravity method, sine law method, and violent measurement method."

Three!

Liu Yixiang's eyes were full of surprise.

really!

Feng Nianchang was right!

He is a physics genius!

Absolute physics genius!

Far surpassing a schoolmaster like myself!

He is a super academic! ! !

At this moment, Liu Yixiang let go of an ant and looked up at Xu Heng.

This feeling is very similar to standing at the foot of the Leshan Giant Buddha, worshiping and watching the Buddha!

Too high!

"hiss……"

Liu Yixiang is extremely serious.

Xu Heng said slowly, "Let's talk about violent measurement first, directly measure with a protractor."

Pfft!

Everyone was dumbfounded!

"Can it still be like this?"

Liu Yixiang also almost fell into a big somersault.

I came to ask for advice and study in a serious manner, but you actually told me to use a protractor to measure?

"This is a question for the college entrance examination! Student Xu Heng, you, this, this... this is not rigorous!"

Everyone also teased, "That's right! If you say that like you, I'll get the answer right away!"

"So what is the degree of this question?"

"Measure it?"

"I have a protractor! What was the angle you just calculated?"

"I measured it, 15! How much was the answer just calculated?"

Liu Yixiang's three views have been subverted.

He said in a trembling voice in surprise, "Yes, it's 15!"

"I'm going to go! Is it true? It's really 15. What's going on here?"

The seemingly nonsensical solution has the same correct answer!