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

Liu Yixiang suddenly felt that he was so stupid in studying hard.

The roommates screamed, "It's dead! Xu Heng, you're dead!"

"In this case, isn't it a bug in the college entrance examination questions?"

Xu Heng nodded, "It can be said that the pictures for the college entrance examination are all very standard."

Liu Yixiang had goosebumps all over his body, and he was powerless to refute.

Because the result just measured with a protractor is indeed the correct answer.

Xu Heng, "The following is the equivalent center of gravity method."

Taking Liu Yixiang's pen and paper, Xu Heng simply made a vertical line, made dots, and then wrote out the formula. After three times and five divisions, he got 15. He didn't say anything the whole time.

Because teaching bullies are not the same as teaching ordinary classmates.

"The third method is the law of sines. You just need to calculate ball a and ball b, and you can get the answer."

Xu Heng quickly finished speaking.

The roommate hadn't finished eating a piece of ice cream, but Xu Heng's topic had already been finished.

Liu Yixiang froze in place, thinking about these three solutions.

He wants to digest!

Digest well!

The roommates' scalps were numb, and each of them felt like they were listening to heavenly scriptures.

"Hiss! Only now do I realize how good Xu Heng is to us! He gave us a lecture step by step, waited patiently for us, and even wrote for us."

"Before we thought that Xu Heng was deliberately embarrassing us! I'm sorry, we were wrong!"

Without comparison, there is no harm.

The dormmates looked at Xu Heng with even more admiration.

Lecture for 3 minutes and digest for half an hour.

No exaggeration at all.

Liu Yixiang was in a daze at Xu Hengsu for half an hour before he gradually straightened out.

"Huh! Got it! Thank you! Student Xu Heng!"

Thumbs up to Xu Heng, Liu Yixiang said, "I'm enlightened!"

Xu Heng waved his hand, "Is there any more? If not, I'll wash up and go to bed."

"Yes, yes, yes!"

He has come up with another question.

Liu Yixiang was very humble at this time.

Compared with when he first came to the dormitory, his attitude was more obviously humble.

When taking the topic, his body was pressed again and again, and he almost became rickety.

topic:

As shown in the figure, two parallel metal guide rails are fixed on the same horizontal plane, and the uniform magnetic field with magnetic induction intensity B=0.50T is perpendicular to the plane where the guide rails shrink, and the resistance at the meeting is very small and can be ignored.

The distance between the guide rails is L=0.20m.Two parallel metal rods A and B with a mass of m=0.10kg can slide on the guide rail without friction, and keep perpendicular to the guide rail during the sliding process. The resistance of each metal rod is R=0.50Ω.

At time t=0, both rods are at rest.

There is a constant force of 0.20N parallel to the guide rail that acts on the metal rod armor to make the metal rod slide on the guide rail.

After t = s, the acceleration of the metal pole A is a = 1.37m/s square. What are the velocities of the two metal poles at this time?

The diagram is very simple.

But the question is by no means simple.

Liu Yixiang, "Student Xu Heng, I'm in trouble."

As soon as these words came out, Liu Yixiang even himself was in the fog.

The roommates gasped and muttered, "Even he doesn't?"

He fixed his eyes on Xu Heng again.

Xu Heng, "Look at the speed at the moment, and the acceleration. The initial speed is zero, and there is the acceleration, and the time. Isn't this very simple?"

Liu Yixiang nodded.

But the roommates collectively stared at each other.

What and what?

totally do not understand!

If it wasn't for Liu Yixiang's question, they almost couldn't help interrupting Xu Heng, insisting on letting him tell the truth.

"It's like playing charades, hey..."

Xu Heng continued, speaking quickly, Liu Yixiang's brows became deeper and deeper.

His expression became more and more restless.

"Wait! Wait! Xu Heng, please wait!"

Xu Heng stopped, and Liu Yixiang digested slowly.

After more than ten minutes, he looked at Xu Heng in embarrassment, "Excuse me, please tell me! Continue."

Xu Heng, "Subtract this force from the external force, the external force is known, and other values ​​are also known, only the current is not known."

"How to calculate the current?"

Liu Yixiang, "Electric energy potential divided by resistance..."

"..."

"In the end, the answer will come out, right?"

"Isn't it super simple?"

Simple?

Roommates, "I really want to beat Xu Heng up! Senior Liu Yixiang, as long as you nod, we'll beat him up! That's too arrogant! Is this simple?"

Liu Yixiang was silent, recalling Xu Heng's thinking and process of lecturing the topic to himself.

It took a while to regain consciousness, and immediately got up, "Thank you! Thank you!"

Xu Heng, "You're welcome, go do your work!"

Liu Yixiang left happily, he knew it was a sleepless night!

The topic Xu Heng talked about would allow him to digest it for a long time!

In physics class the next day, Liu Yixiang stood up.

"Teacher! This problem can actually be solved by violent measurement?"

In front of everyone in the rocket class, Liu Yixiang said it.

The physics teacher was confused, "What violence measurement method?"

All the students in the class looked sideways.

"Liu Yixiang, what are you talking about?"

"Yeah! Stop messing around, okay? Yes, your grades are very good, but don't mess around!"

"Never heard of this method!"

The physics teacher frowned, "How to do it?"

Liu Yixiang, "You need a protractor, and then just measure it directly."

Physics teacher, "!!!"

Everyone in the class, "!!!"

This is rocket class!

The students with the best grades are all here.

"Liu Yixiang, are you treating us like monkeys! If this can be measured directly, we still need to calculate it? If it can be measured, can this be included in the college entrance examination?"

Liu Yixiang, "If you don't believe me, just try it, teacher, I have a protractor here."

The whole class knew that the answer to this question was 15, and now they took out their protractors.

"Fuck! It's really 15! Teacher, his method is really feasible! It's really 15! It can't be a coincidence!"

"Teacher, it's 15!"

The teacher's face was full of black lines, "Stop shouting, I measured it myself! It is indeed 15! Hiss... But this is not to say after all."

Liu Yixiang, "But in the college entrance examination, it can indeed save us a lot of time!"

"Xu Heng said that the test papers and pictures of the college entrance examination are very standard."

Xu Heng!

brush!

The teacher and classmates all looked at Liu Yixiang, "You just said Xu Heng? Did he tell you?"

Liu Yixiang, "Yes!"

"I digested the problem-solving ideas he gave me last night, and there are two more."

and so……

Xu Heng gave you three kinds?

Depend on! ! !

He is worthy of being the super academic bully that the whole school pays attention to!

"Wait, why does it feel that something is wrong..."

The physics teacher suddenly reacted, "You are a top student in the rocket science class of the third year of high school, and you went to find Xu Heng, the second year of high school? Did he teach you?"

Liu Yixiang nodded seriously, "The black and white question I did just now was also taught by Xu Heng."

The physics teacher gasped, he was extremely depressed.

He felt a deep malice.

"You study by yourself first, I'll make a call."

After leaving, he immediately contacted Qin Fangming, "Old Qin, do you mind Xu Heng in your class?"

· · · · · · · · · · · · · · · · · · · · · · · · · · ·????????????????

Qin Fangming, "What's the matter?"

"Xu Heng from your class has been taught to my class!"

"Do you know who you taught? Liu Yixiang!"

"And the ideas and methods used are better and more than my teacher's!"

"Don't you say it's annoying!"

Qin Fangming, "According to what you mean, do you think you are not as good as our class Xu Heng?"

"Although I'm angry, I still have to admit this, it's true!"

Qin Fangming, "Okay, I understand."

hang up the phone.

Qin Fangming was lying in the hospital, and he was a little weak when he answered the phone.

There was something wrong with his physical examination yesterday, and he was hospitalized for surgery on the spot.

It happened suddenly, and he is still communicating with the school to find a substitute teacher to help him with physics class.

"Isn't someone choosing this!"