My Identity As A Schoolmaster Has Been Exposed

Xu Cong caught a glimpse of it from sideways. After he glanced at the two invigilators secretly from the corner of his eye, he looked at it openly when he thought about it.

When the invigilator saw him being so arrogant, he wanted to remind him.

But the two of them shook their heads and thought, Xu Cong didn't hurt to see it, anyway, the difference between the second and third grades of high school is still very large.

It is impossible for Xu Cong. This is physics, and it is the third year of physics, so I didn’t pay much attention to Xu Cong.

Because the senior sister’s test paper was on the edge of the table, Xu Cong could easily see the last question she had not completed.

The final finale of physics in senior three:

A large metal bucket with a thin bottom and a mass of m=200kg and a height of 2.00m is inverted on the bottom of the wide pool, as shown in the figure.

The inner cross-sectional area of ​​the barrel S=0.500 square meters, the volume of the barrel wall plus the barrel bottom is V₀=2.50×10⁻²m3, and the barrel is sealed with air with a height of L₀=0.200m. Pool depth H₀=20.0m, atmospheric pressure P₀=10.00m water column height, water density p=1.000×10³kg/s², acceleration of gravity is taken as g=10.00m/s².

If the bucket is lifted up with the rope shown in the figure, so that the bottom of the bucket reaches the surface of the water, what is the minimum work required by the rope pulling force on the bucket? (The result should keep three significant digits) Regardless of the resistance of the water, set the water temperature to be very low, ignoring the influence of its saturated vapor pressure, and set the water temperature to be uniform up and down and remain unchanged.

After Xu Cong finished reading it, he also found this topic very difficult, no wonder Feng Nianchang would give up.

Because if this question really needs to be calculated, it will definitely end the exam.

Even after the exam, Feng Nianchang didn't have the confidence to say that he must be right.

So she can't lose big because of small things, she wants to realize the brazen rhetoric she said at noon for this schoolboy.

Although she didn't have the confidence to do this question, Xu Cong did.

After reading the question, he immediately took out the draft paper, after a little thought, Xu Cong began to write.

Seeing him swish, I started to write.

"???"

Feng Nianchang was a little stunned at Xu Cong's operation. What is he doing? What is he writing?

The immediate priority is, shouldn't he show me his test papers?

Hey, that's not right, why did he fold the test paper early and put it under the papyrus?

Feng Nianchang has a big question mark in her little mind.

On the paper:

"When the bucket sinks to the bottom of the pool, the gravity of the bucket is greater than the buoyancy..."

There are too many situations involved in the increase of the gravitational potential energy of the barrel.

When the bucket is all under water, half of the time, when it is not in the water, it must be taken into account.

Xu Cong wrote down the problem-solving process step by step, and marked 1234567 points to these formulas. Finally, he entered these formulas one by one to get a formula.

Then substitute the relevant data into the calculation, and then take three valid digits and press the number to get W=1.37×10⁴J!

Just the answer to this question was written full of scratch paper, and it was done by Xu Cong. One can imagine how difficult this question is.

The size of the entire draft paper is slightly larger than that of A4 paper, and the one-page problem-solving steps, calculation process and results are all clearly written.

Xu Cong's characters were deliberately written a little too large, just enough for Feng Nianchang to see clearly.

When the draft paper appeared in front of Feng Nianchang through certain blind spots, she was simply stupid.

Having said that, she helped Xu Cong to do some questions this afternoon. She never expected that she would have done the finale questions for her senior year in high school!

She was killed by Xu Cong, but Feng Nianchang couldn't take care of it in the examination room. She quickly read the answer Xu Cong gave.

She quickly glanced at the entire answering process, and her idea was correct!

She hurriedly checked the data again. She took out her draft paper and checked Xu Cong's formula data, and it seemed that it was correct!

"I, this, this, this..." Feng Nianchang looked at the answer, only feeling that her hands were shaking.

She just watched Xu Cong's answer all the time. Xu Cong didn't have ten minutes from looking at the question to finishing it!

Damn!

What the hell is this...

Bah baah baah! Can't swear!

What kind of academic bully this is!

Feng Nianchang has a big head. What kind of monster is this junior and how did he learn it?

She couldn't help turning her head to look at Xu Cong again. At this time, the invigilator finally came down, and the two students were eye-catching. It's not good...

"Ahem! Don't look around! Answer the questions!" The invigilator said to Feng Nianchang in a low voice.

As for Xu Cong... he can't manage, and doesn't want to. This guy is definitely done...

Feng Nianchang returned to his senses, staring at the draft paper in his hand, and dared not to copy it on the answer area of ​​the test paper.

The invigilator looked at her in a daze and kindly reminded her: "Since you have answered it on the pamphlet, please write it down on the test paper as soon as possible! Don't let the time come. If you haven't written it on the test paper, you will lose a lot."

After the invigilator finished speaking, he turned and left, but still couldn't help but look sideways, looking at Feng Nianchang more.

Surprised!

This little girl is terrible!

The final question of the physics test paper was actually done on draft paper, and it was full of writing, which seemed to be justified.

Isn't she afraid of running out of time like this?

You know, in the assessment of big questions, every step has a score. Many people can write as much as possible, but she actually vowed to calculate it again.

Her mind is really stable!

It's weird, it's really weird!

One Xu Cong in this examination room is already against the sky. I didn't expect another one. Could it be said that the new era of Xilin High School is coming?

Feng Nianchang copied the answer up ashamed when he heard the invigilator's words.

She comprehended as she wrote, and even whispered in a whisper and wondered.

Another invigilator passed by and looked at her strange behavior, and was also puzzled: "???, what's the matter with this classmate?"

Is this boasting yourself? It's too narcissistic too!

After finishing the finale, Feng Nianchang began to check the entire test paper.

At the same time, she couldn't help but glanced at Xu Cong, who was lying there again, not looking at the test paper.

She began to wonder if Xu Cong had done it all?

But why doesn't he check, no one can be sure that he is 100% correct, right?

But after thinking about it, this guy didn't even have to deal with the finale of physics for his senior year. Isn't it easy to come to the second year of senior year?

so horrible!

She seemed to gradually perceive the horror of Xu Cong, and she fell into the boundless universe like a dust.

But this kind of existence is simply not something she can covet!

When there were 15 minutes left in the exam, Xu Cong got up, without any accident, he again turned in the paper ahead of time.

Immediately afterwards, Feng Nianchang also handed in the paper, because she was afraid that she would not be able to find Xu Cong in a while.

After handing in the paper, she chased it out and shouted at Xu Cong: "Xu Cong, wait!"

Xu Cong turned around and glanced at her suspiciously. Why did she hand in the paper ahead of time?

follow me?

"Well, the physics exam just now..." Feng Nianchang said embarrassedly after coming over.

Who knows Xu Cong said indifferently, "Oh, that question... No thanks, I thought you wouldn't know it, so I just did it."

"Didn't you say that this exam is very important to you? So I will do it to the end."

Feng Nianchang patted his forehead fiercely, then collapsed and said, "I said I didn't mean this, do you believe me?"

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