Xu Heng caught a glimpse of it from the side!
Originally, the invigilator wanted to step forward to remind him.
However, the two of them thought about it and decided that there was no harm in taking a look. After all, the grades were different. The difference between the second and third years was still very big.
It was impossible for Xu Heng to do so.
So I didn't pay too much attention to it.
The last question of the physics class in the third year of high school was:
A large metal bucket with a mass of m= 200kg and a height of 2.00m was inverted at the bottom of the wide pool, as shown in the picture.
The inner cross-section area of the barrel was S=0.500 square meters, the volume of the barrel wall and the barrel bottom was V0=2.50*10 (-2) cubic meters, and the barrel was 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*10 (cubic) kg(s (square), gravitational acceleration g=10.00m(s (square).
If the bucket is lifted up with the rope shown in the picture so that the bottom of the bucket reaches the water surface, how many joules is the minimum work required to pull the rope to the bucket? The water resistance was ignored. The water temperature was set to be very low, and the influence of the saturated vapor pressure was ignored.
The water temperature was set to be uniform and constant.
The questions were very difficult!
It was no wonder that Feng Nianshang gave up. If she continued to calculate this question, she would definitely finish the exam.
He might not even be able to finish it after the exam!
After she finished, Feng Nianshang was not confident that she would be right.
Therefore, she couldn't lose a big deal for a small gain.
She wasn't confident, but Xu Heng was!
He immediately took out the parchment, thought for a moment, and started writing.
Feng Nianshang: "???"
What was he writing?
Shouldn't he show me his test paper?
Why did he fold the test paper so early and put it under the papyrus?
His mind was filled with question marks.
On the papyrus paper,
"When the bucket sinks to the bottom of the pool, the gravity of the bucket itself will cause the fish to float…" The
increase in the gravitational potential energy of the bucket involved too many situations.
When the bucket was completely underwater, when it was half underwater, and when it was not in the water, he had to take it into account.
Xu Heng wrote step by step in an orderly manner.
He also labeled these equations with 234567. Finally, he substituted these equations one by one to obtain a formula.
Then, he substituted the relevant data into the calculation, and then took three effective digits to obtain W=1.37*10 (4) J!
Just the answer to this question was written on a piece of parchment.
The size of the draft paper was slightly bigger than A4 paper.
Xu Heng deliberately wrote his words in a small font, just enough for Feng Nianshang to see clearly.
When Cao Zhi appeared in front of Feng Nianshang through some blind spots, she was dumbfounded.
She had agreed to help Xu Heng!
He had never expected that he would be able to solve the final question of his third year!
She roughly looked at it and her train of thought was correct!
He checked the data again. It seemed to be correct!
"I, this, this, this…"
Feng Nianshang's hands were trembling.
She had been watching Xu Heng's answer the entire time!
From looking at the questions to completing them, it did not even take ten minutes!
Oh my god!
What in the world is this…
Bah! You can't scold people!
What kind of genius was this!
Feng Nianshang's scalp went numb as she looked at Xu Heng.
At this moment, the invigilator passed by.
"Cough cough! Don't look around! Hurry up and answer the questions!"
Feng Nianshang came back to her senses and stared at the parchment in her hand.
The invigilator said,"Since you've answered it on the script, please write it down on the paper as soon as possible! He didn't want to make a huge loss before he wrote it on the test paper when the time was up.”
The invigilator turned around and left, but he couldn't help but glance at Feng Nianshang.
He was shocked!
This little girl was amazing!
The last question of the physics exam was actually done on the performance draft paper!
Wasn't she afraid that she didn't have enough time?
Strange!
It was really strange!
It was already very heaven-defying for Xu Heng to appear in this examination hall!
He did not expect another one to appear!
Feng Nianshang copied the answer, sweating profusely.
As she wrote, she understood and even whispered in amazement.
The prison teacher passed by."??？”
What was wrong with this classmate?
Was this a compliment?
Wasn't he too narcissistic?
After settling the final question, Feng Nianshang began to check.
She couldn't help but glance at Xu Heng. He was lying there again, not even looking at the test paper.
She was puzzled.
Did he finish everything?
Can you guarantee that everything is correct?
Otherwise, why didn't he check?
No one could be 100% sure that they were right, right?
But on second thought.
This fellow had even effortlessly solved the final physics question for her in her third year of high school, so wouldn't he be able to do it for her in her second year of high school?
It was too terrifying!
She seemed to gradually realize how terrifying Xu Heng was.
It was like a speck of dust falling into the boundless universe.
However, it was not something she could covet!
There were only 15 minutes left in the exam.
As expected, Xu Heng submitted his paper in advance again.
Immediately after, Feng Nianshang handed in her paper.
She was afraid that she couldn't find Xu Heng.
Feng Nianshang chased after him."Xu Heng! Wait!"
Xu Heng was speechless.
"That, the physics exam just now…"
Xu Heng said,"Oh, that question! No need to thank me. I thought you wouldn't know how to do it, so I just did it.”
"Didn't you say that this exam is very important to you? So I'll be a good person to the end."
Feng Nianshang slapped her own head and broke down."If I say that's not my intention, will you believe me?”
PS: Continue! There were updates!
Please support me!
This book comes from：m.funovel.com。