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

"If your question can really be put up, what about mine?"

As soon as Xu Heng said this, all the teachers looked at Xu Heng's question in unison!

Found that physics problem.

在质量为m1的铜量热器中装有质量为m2的水，共同的温度为t12；一块质量为m3、温度为t3的冰投入量热器中（如图所示）。试求出在各种可能情形下的最终温度。计算中t3取负值。铜的比热c1＝0.1kcal/kg0C，水的比热c2＝1kcal/kg0C，冰的比热c3＝0.5kcal/kg0C，冰的熔解热L＝80kcal/kg。

Only then did they notice that Xu Heng not only came up with the questions quickly, but even the drawings were so perfect.

Hengping!

Vertical!

Looks good!

"He didn't have a ruler just now..."

"No! I'm sure no!"

"But this is too straightforward!"

Everyone, "!!!"

"This……"

Everyone looked at Xu Heng.

Xu Heng, "???"

Hey Hey hey!

I said, everyone, you should look at the topic. What are the few lines I just drew here?

Hey!

This year's teachers, why are they so difficult to teach!

Xu Heng was heartbroken.

The female teacher took Xu Heng's question and looked at it seriously.

She had a bad complexion at first, but the more she looked at her, the uglier her complexion became.

The leader of the physics group couldn't help coming over at this time.

Geek!

After reading the topic, he was in a bad mood.

"The topic is very good! There are also pictures!"

"This, this, hiss... this..."

"Okay! I admit it! Xu Heng, your question is really up to standard!"

The teacher of the physics group gritted his teeth.

Xu Heng, "Don't be like this! Teacher! Don't just talk! You are doing the questions!"

"The rules of the competition are not that you give me a question, I give a question, and then you talk about it!"

"Hurry up!"

"And Teacher Li, hurry up too!"

"I'm waiting!"

As he said that, Xu Heng leaned over to the teachers of the other courses and looked at the questions they were going to ask.

Simple……

Simple……

Still simple...

wrong!

Wrong here!

Wrong there!

The more Xu Heng looked at it, the more uncomfortable it became, and the expression was on his face.

Except for the math problems that are still progressing slowly, Xu Heng can roughly guess the problems they will be involved in after looking at the first two lines of the other classes.

It's not Xu Heng who knows the future!

Rather, Xu Heng knew all possible directions of the questions they posed.

You are so out, I understand, I will do it!

If you go out like that, I still understand, and I will still do it!

Xu Heng sighed and watched with cold eyes.

Finally, a teacher's mentality collapsed!

"I can't get out! I can't get out! I admit defeat!"

"Student Xu Heng, show me your chemistry problem!"

As soon as Xu Heng handed the chemistry problem to the teacher, the female teacher on the other side raised the problem in her hand, and discussed with Xu Heng his thinking on solving the physics problem.

Xu Heng reluctantly said, "Okay! As long as the idea you say is right, teacher, I don't need you to do it, I will count you as right!"

"But... sorry, teacher, I was wrong."

"This question may have three different final states: only ice, mixed ice and water, and all water."

"Teacher, you have also considered this! But you made a mistake later!"

"The idea of ​​this question should be..."

While speaking, Xu Heng wrote down:

The temperature of the ice rises, but does not melt, reaching a certain (negative) temperature ta;

The heat given off is equal to the heat absorbed:

c3m3（ta-t3）＝（c1m1＋c2m2）（t12-ta＋）+m2L

得出最终的温度为ta=（（m1c1+m2c2）t12+m3c3t3+m2L）/（m1c1+m2c3+m3c3）

"It will change here, because the conditions of this situation will..."

"..."

"If the numerator of the above formula is negative, we obtain the following condition..."

"..."

"So after mixing, there is ice of mass (m3x) and water of mass (m2+x) in the calorimeter. ... A negative value of x means that there is water that freezes, and the mass of ice increase. For a given value, we can easily get the final result from the formula."

"That's it……"

After finishing speaking, Xu Heng picked up the water that Sun Jianhua had handed over by himself before, only to realize that it was already empty.

But the next second!

Swish swish!

A dozen hands, each holding a bottle of water, handed it to Xu Heng.

this moment!

All are delighted!

Xu Heng took a bottle casually and drank it.

"Gudong~gudong~gudong..."

When Xu Heng put down the water, another teacher gave up.

Xu Heng, "Uh..."

do not!

You are all prepared in advance!

How can you just give up and give up!

do not!

Don't give up!

Xu Heng turned his gaze to the director.

The director smiled awkwardly, "Student Xu Heng, why do you keep looking at me like this, don't! Don't look at me like that, they abstained by themselves!"

"In fact, everyone can see that there is a clear gap between your performance and the performance of the teachers, right! So..."

There is no need for the director to say more, many teachers are also clear about it.

The gap between them and Xu Heng was already revealed when they were writing Chinese essay questions.

Xu Heng's analysis was so thorough, the moment he opened his mouth, it was like a thousand-foot waterfall flying straight down, crashing...

Amaze everyone!

After that, the physics question beat the opponent with an absolutely crushing momentum.

As the director's voice fell, many teachers echoed, "Today I really saw Xu Heng's level!"

"I'm convinced! I'm completely convinced!"

"I admire! Student Xu Heng! Your strength is unquestionable!"

"I have to say that student Xu Heng's strength is far above ours!"

"From the point of view of the question, we don't care whether student Xu Heng has prepared in advance..."

Xu Heng interrupted the teacher, "Teacher, what you said is a bit too much. Since you have joined the test group of the Nine Schools Joint Examination, you must have questions yourself!"

Several of the teachers' faces darkened instantly.

The teacher who gave up on the question also let out a long sigh, "Student Xu Heng, because of you, the questions we prepared by ourselves are not up to standard!"

"If the questions used on you can be the same as those of all the students in the Nine Schools?!"

"The question given to you must be treated specially, it must be much more difficult!"

"That's why everyone is so sad!"

Xu Heng raised his eyebrows slightly, expressing his doubts.

Don't you have both hands ready?

But forget it!

It seemed that half of the two hours had passed.

Some teachers give up!

There are also some teachers who come up with the topic, but they are not satisfactory!

On the contrary, when they saw Xu Heng's question, their eyes lit up, and they were even ecstatic!

"This question is good! Very good! Team leader, let's keep it! Let's use it on the exam paper of the Nine Schools Federation this time!"

Xu Heng, "???"

I go!

Are you so hasty?

???

When Xu Heng looked at everyone again, he found that something seemed wrong.

He pulled Sun Jianhua and Hong Jingjun aside, and said clearly.

"Two, you were invited by the director to be childcare, don't you suddenly feel very boring?"

Sun Jianhua and Hong Jingjun looked at each other and smiled.

"Hahaha... Sure enough, I was seen through by you little guy!"

"But we don't think it's boring. On the contrary, we like you very much when you look so powerful!"