My Identity As A Schoolmaster Has Been Exposed

"Hey…"

Qin Fangming explained helplessly: "The original classmates of Class 3, when I took a month of sick leave and were replaced by classmate Xu Cong, they had already finished all the remaining courses!"

"You said, what do they do if they don't study by themselves?"

Looking at these people from Tang Yongxue again, Qin Fangming said: "You can arrange it yourself and look at other subjects, but don't violate the class records! Understand?"

"Also, give some face! Don't stand up in class to refute my problem-solving ideas, have you heard?"

Qin Fang was scared, and as soon as he said this, the jaws of the other classmates almost fell to the ground.

Although I have heard that Xu Cong took lessons in the original class and made the whole class first in the exam, it is not enough to finish all the courses!

It's too fierce!

One month!

How is this done?

What's even more incredible is that Qin Fangming still said that, always feeling that Qin Fangming was scared!

A physics teacher is afraid of his classmates!

And they were still afraid that they would stand up and refute his problem-solving ideas! The three views were subverted, and the other students were stunned.

At this moment, Tang Yongxue and others suddenly felt that they were superior!

That kind of pleasure, rising from the soles of the feet!

Cool!

It turns out that this is too good feeling!

They all looked at Xu Cong, their eyes filled with gratitude.

"Gluck..."

"Teacher, you teach! We promise to hold back!"

Qin Fangming's face turned black when he heard it. Is this fair?

"What is guaranteed to hold back? So, you learn Xu Cong, and sleep again, okay!" He pleaded to the classmates of the previous 3 classes.

At this point, Qin Fangming is really scared!

Although in the eyes of the classmates, this physics teacher is already very shameless, but Qin Fangming does not do this, and he will be even more shameless if he is refuted by these guys in the course of class!

After this class, Qin Fangming called someone walking on thin ice, and that was called anxious, for fear that the students would stand up and give a simpler solution to the problem. In that case, where would he put his old face!

For some topics, he has to follow the teaching materials, Xu Cong's thinking, he also knows, but he can't talk about it!

It will be done in a few minutes, then how will his next class be arranged?

Sometimes, in some cases, the teacher has to speak according to the requirements, and the majority of the audience, rather than just taking care of a few people.

The teacher is not responsible for one person or several people. He is responsible for one class or several classes, so what he wants to talk about must be beneficial to most of the students.

"Ring Ling Ling..."

Qin Fangming breathed a sigh of relief when the bell rang after class.

At the same time, looking at Xu Cong, they slowly straightened up and stretched, and Qin Fangming's face was black.

"%%￥##￥%" He muttered to himself in a low voice on the podium, even though it was Martian!

"Xu Cong, come here." Qin Fangming took Xu Cong out.

"Isn't going to be recommended yet?" he asked Xu Cong outside the classroom.

Xu Cong rubbed his sleepy eyelids, and said lazily, "Yeah."

Seeing that he hadn't made a decision, Qin Fang immediately persuaded him: "Actually, it is good for you to send a pass. You do well in the exam twice, but what about one of them?"

"But the recommendation is different, and there is no need to take the exam."

"Although you are sure of ten when you are successful, you will be sure of ten when you are sent!"

Xu Cong smiled and said to him, "Teacher, are you mainly trying to persuade me?"

Qin Fangming's smile became awkward: "Ahem! Actually, there are still a few topics I want you to discuss with you!"

Xu Cong raised his brow when he heard this, and asked, "Go to your office?"

Qin Fangming didn't hide it at this time, and said frankly: "Yes, I will show you the problem, you take it back and look at it, I want to see what your idea of ​​solving the problem is like!"

"I know you have a mobile phone, I will add you a friend, you will have a solution to the problem, once you have the answer, just tell me!"

Xu Cong asked at this time: "There are many questions?"

Qin Fangming shook his head and said, "Not much!"

Not much. Why would I waste so much time? When I came to the office, Xu Cong took a look at the question.

As shown in the figure, a balloon is in a static state in the wind, the force of the wind on the balloon is horizontal to the right, the angle between the string and the vertical direction is a, and the pulling force of the rope is T, then the force of the wind on the balloon is F The size is ()

A.T/sina

B.T/cosa

C. Tsina

D. Tcosa

Qin Fangming saw that he was looking at the question there, and at the same time he knew the weight of the question, so he said to him: "Go back and consider..."

"Think about it," Xu Cong interrupted him before he finished saying the four words.

"Assuming a=0, then F=0, and there is no wind, substituting a=0, the answer is C!"

simple!

rough!

Before Qin Fangming finished speaking, the answers and ideas for solving the problem came out directly. Qin Fangming was stunned, and was at a loss at the time.

Xu Cong didn't give him a chance to respond, so he looked at the second question.

As shown in the figure, two objects with masses of m₁ and m₂ are connected by light springs, and move together in a uniform linear motion in the horizontal direction under the action of force F (m₁ is on the ground, m₂ is in the air), and the force F is proportional to the horizontal direction. day. Then the supporting force N and the frictional force f supported by m₁ are correct ()

A.N=m₁g-m₂g-Fsine

B.N=m1g+m2g-Fcose

C.f=Fcos0

D.f=Fsin0

Xu Cong, "Assuming that the included angle is Θ, the value slides upward, so N=m1g+m2g-F, so the friction force f=0, the answer is AC!"

too fast!

Qin Fangming is still in shock for the first question, and Xu Cong's second question is over.

"These two questions are the same, with the ultimate thinking, combining the questions, taking the maximum, minimum, or the most appropriate value."

Xu Cong ignored the physics teacher. If you were shocked, you should be shocked. Time is precious, so he turned to the third question.

Hot isostatic pressing equipment is widely used in material processing. When the equipment is working, the inert gas is first pressed into a pre-evacuated furnace cavity with a compressor at room temperature, and then the furnace cavity is heated, and the high temperature and high pressure environment is used to The material placed in the furnace cavity is processed to improve its performance.

The remaining volume V=0.13m₃ after the solid material is put into the furnace cavity of a hot isostatic pressing equipment. After the furnace cavity is evacuated, 10 bottles of argon are compressed into the furnace cavity with a compressor at room temperature.

It is known that the volume of each bottle of argon gas is V₁=3.2×10⁻²m₃, the gas pressure in the bottle before use P₁=1.5×10⁷Pa, the remaining gas pressure in the bottle after use P₃=2.0×10⁶Pa; the room temperature T=27℃. Argon can be regarded as an ideal gas.

(1) Find the pressure of the gas in the furnace chamber at room temperature after argon is pressed;

(2) Heat the furnace cavity with argon gas pressed to 1227°C, and find the pressure of the gas in the furnace cavity at this time.

Xu Cong is like a question-answering machine with no emotions, just looking at the questions and giving answers, it is really not in the category of human beings!

The corners of Qin Fangming's eyes twitched, and he stared at Xu Cong. He didn't believe that, in just ten minutes between classes, and two minutes was wasted on the road, Xu Cong could solve the problem!

Especially this last question is obviously very difficult!

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