This week was fleeting.
This was especially true for Xu Heng's physics class. Other teachers were also impressed by Xu Heng and began to improve their teaching methods.
Many students were more and more interested in class.
To be more precise, it was because he liked to perform and wanted to be recognized, so he looked forward to class even more.
"I've never been so excited since I was young!”
"This is the first time I'm looking forward to math class so much!”
"Exactly! Me too! The math teacher asked us to prepare our own questions and give us our own answers! We'll talk about it in class!"
"I even went to ask the third-year seniors!”
"Why didn't you ask Xu Heng about the third-year students?”
"I can't get in the queue!"
"Ahahaha, there's nothing wrong with your words!”
“……”
It was precisely because of this that the students became more and more enthusiastic.
After school, Yue Pingting was still discussing with Xu Heng.
However, they were sitting in the form teacher's car, and the discussion was very quiet.
It was still Yao Ruiyi who sent Xu Heng back.
She was still the driver.
When she got home, she did not stay for even a minute before she went back.
Zhou Xiu'e's face was full of smiles." My son is back!" Come, come! Sit! Have a good rest."
Yue Pingting also left her bag at home and rushed over with her homework.
"Auntie! I'm coming!"
Zhou Xiu'e looked at Yue Pingting. This was the first time she had brought homework to him.
He couldn't help but ask," What's going on?”
Xu Heng smiled.
Yue Pingting was helpless. I'm here to study. I can't!"
"Alright, alright, alright! It doesn't matter if you come to our house to learn or not!”
Yue Pingting felt that she was being despised.
Xu Heng went to the study room to play games while Yue Pingting studied.
When she encountered a question that she didn't know how to answer, she wanted to not ask it for the time being and not disturb Xu Heng, but…
Xu Heng said," It's fine. Let me take a look."”
Yue Pingting's scalp tingled as she handed the question over.
Xu Heng quickly scanned through it and said," This requires a theorem. It's like this…"
As he spoke, he played a game.
He was able to kill three people at the same time, but in the end, he also died!
Putting down the mouse, Xu Heng gave Yue Pingting a good explanation.
"Have you learned it?"
"Yes!" But…you're too disrespectful! I'll fight it out with you!"
"Pow!!!~~~"
F * ck!
Yue Pingting, you little lunatic!
This is my house, and the door to the study is still open!
Are you going to cause trouble?
Good!
You forced me to do this!
Xu Heng also pushed his luck and pulled Yue Pingting into his arms.
"Your revenge won't do! I'll teach you some more…"
Shua!
Yue Pingting struggled.
She was just a dragonfly skimming the surface of the water and fooling around with Xu Heng.
However, Xu Heng didn't care about that. You were the one who started it. This has already developed to a point where it's not up to you!
After a while, Yue Pingting left.
Xu Heng smiled evilly.
Yue Pingting stomped her feet." Bully!"
Xu Heng continued to play.
Yue Pingting's racing heart had yet to calm down.
" Dong dong…"
Looking at the questions, she was completely distracted.
Zhou Xiu'e walked in and looked left and right.
After a few minutes, Yue Pingting didn't even start writing.
She moved closer to Xu Heng." Son, stop playing. It's affecting Little Yue's studies!”
Xu Heng: "???"
"Mom! I'm wearing earphones and there's not much sound. Won't it affect her?”
Zhou Xiu'e rolled her eyes." It's not easy for Little Yuezi to study seriously. You can't do this. Hurry up and stop playing!”
Xu Heng was helpless." Mom, that's not the reason. She's…"
Yue Pingting stood up immediately like a frightened bird." It's because of this! Auntie, I'd better go to the living room to study!”
Zhou Xiu'e said," No need! Learn in the study. Xu Heng, come out!”
Xu Heng replied," Alright, alright, alright! I won't play after this game ends."
In the end, four kills ended the match.
Xu Heng turned off the phone and rolled his eyes at Yue Pingting.
Yue Pingting felt wronged." It's not me. It's Auntie. Auntie dotes on me. You only know how to bully me."”
Xu Heng was speechless.
"To give you this chance to make it up to me, please teach me another question!" Physics is your forte."
"So difficult! Heavens! I have a headache seeing this!"
Title:
There is a uniform electric field in a cylindrical region. The cross-section machine of the column is a circle with O as the center, the radius is R, and the diameter of the circle is as shown in the figure.
Charged particles with mass m and charge q (q>0) enter the electric field at different speeds from point A on the paper. The direction of the speed is vertical to the direction of the electric field.
It is known that a particle with zero velocity when it enters the electric field will exit the electric field at a speed of V0 from point C on the circle, and the angle between AC and Ab0 =60. The particles in motion are only affected by the electric field force.
(1) Find the strength of the electric field;
(2) In order to maximize the kinetic energy increment of the particle after passing through the electric field, what should be the speed of the particle when it enters the electric field?
(3) In order to make the change in momentum of the particle before and after passing through the electric field mV0, how fast should the particle enter the electric field?
" This question…is very difficult?" Xu Heng asked.”
Yue Pingting nodded earnestly.
Xu Heng frowned." It's obviously very simple!”
Yue Pingting's face was bitter.
Xu Heng sighed." Alright, I'll explain it to you." But…"
After that, Xu Heng smiled evilly.
Yue Pingting pouted." What are you doing?!" Xu Heng, you bad thing, you, you, you…"
Bang!
Xu Heng said," I only need you to take revenge, but I'm not allowed to fight back?”
How could there be such a thing as allowing the officials to set fires and not allowing the common people to light lamps!
Yue Pingting's lips were extremely red!
"Humph!"
Xu Heng laughed.
"Alright, alright, listen carefully."
"Let me tell you, the initial velocity is zero, and after passing through point C, this is another uniform electric field. The electric field line is a straight line, so this particle must be doing a uniform acceleration in a straight line motion, so the electric field line must be going straight in the direction of AC!”
"This question asks you to find the strength of the electric field.”
"That's why we have to use the kinetic energy theorem to know.”
" Look at the picture again. If you connect the OCs, the length should be the same, right? This one, and this one, and the angle is still 60 degrees, so…"
Yue Pingting was getting better and better." So this is an equinox triangle!”
Xu Heng nodded.
"So the length of AC is equal to R. You should know that F=EQ, so the work done by the electric field force should be F*AC=1/(2mV0m2).”
Yue Pingting listed the formula according to Xu Heng's explanation.
E=(mV0m3)/(2qR)
Xu Heng replied," Yes, the first question was settled easily, right?”
Yue Pingting opened and closed her mouth.
It was too simple!
Yue Pingting asked," What's the second question?"
Xu Heng continued," You should carefully examine the question. What you're asking is the kinetic energy increment of a particle after it passes through an electric field. What is the value of?”
Yue Pingting scratched the back of her head, her face full of confusion.”
Xu Heng sighed." Ek= W-sum = electric field force EQ multiplied by displacement!”
" To ensure that the displacement increment increases, this EQ…"
“……”
Xu Heng said seriously, and Yue Pingting listened attentively.
Zhou Xiu'e passed by and saw the two of them studying seriously. She was very pleased.
But what Zhou Xiu'e didn't understand was why Yue Pingting's lips were so red. Was it lipstick?
She wasn't sure either.
When she went to prepare dinner, it began to rain heavily outside.
"Rumble!"
Thunder rumbled!
The wind was also very strong!
The rain became heavier!
"Hualala! Hualala! Hualala…"
Fortunately, Xu Yueshan was back.
"Aiya! Why was this thunderstorm so heavy? Just two steps, I'm only two steps away from home, but I'm all wet!”
Zhou Xiu'e said," Hurry up and wash up!"
"Right! Don't go to the study, you'll disturb Xu Heng and Little Yue!”
Xu Yueshan asked," Are they on vacation?"
"Yes, yes! Go! They are studying."
"Good, good, good!"
After washing up, Xu Yueshan helped Zhou Xiu'e prepare dinner.
When Xu Heng and Yue Pingting came out, the fragrant dishes were already on the table.
It was still raining heavily outside.
"Little Yue, you can stay at our house tonight! I told your mother, the rain is too heavy! Even an umbrella can be blown away!"
"Ah?" Is it okay for Auntie to do this?"
Zhou Xiu'e rolled her eyes." What's so good about it?! Really! When you were young, you cried and begged to be with Xu Heng.”
"Ahahaha! Thinking back, when you were young, you still hugged Xu Heng's arm and cried. He wanted to be with Xu Heng.”
Yue Pingting blushed in embarrassment.
"Stop fooling around. Let's eat!"
They ate and chatted for a meal and spent the rest of the time.
In the end, Zhou Xiu'e went up to Yue Pingting and asked," Little Yue, the color of your lipstick is very nice! I'll recommend it to auntie!"
Lipstick?
What lipstick color number?
Yue Pingting was stunned. Auntie, I didn't!"
Zhou Xiu'e was stunned for a moment." But your little mouth is so red.”
Yue Pingting blushed." I didn't know how to read the questions, so I pursed my lips.”
"Oh, I see! I said so! If it wasn't for the lipstick, I would have thought that it was a kiss!”
Zhou Xiu'e didn't treat Yue Pingting as an outsider, so she often joked.
" Auntie!!!"
Yue Pingting was shy and embarrassed.
"Alright, alright, go and study! I'll clean up the table and make your bed.”
"Good!"
Yue Pingting stood up and pulled Xu Heng.
"Xu Heng, let's go!"
Xu Heng: "???"
What does it have to do with me!
Sigh…
In the study room.
After learning for a long time, Xu Heng started playing games while Yue Pingting was scrolling through her phone.
Suddenly.
"Ding! Ding!"
There was a piece of news.
Yue Pingting said," Here's your phone. It's Rui Yi…Oh, no, it's the homeroom teacher who sent you a message.”
Xu Heng was playing games." Look at what's posted.”
He opened it.
"The form teacher asked you some ancient poems!”
Xu Heng said," Tell me, I'll answer."”
Yue Pingting relayed," No favoritism, no cliques, the way of the king is broad. What's next?”
Xu Heng said," No favoritism, no cliques, the kingly way is vast; Without cliques and favoritism, the kingly way is fair and peaceful; Without rebellion and favoritism, the kingly way is upright. This was from the Book of History. Hong Fan "
Yue Pingting said," Speak slower. I didn't remember! How to write this word! Forget it, you should just send a voice message to your form teacher!”
Xu Heng repeated.
Then, he looked at the questions that Yao Ruiyi had sent him and answered them one by one.
"When the grain is sown, I will report to you that I have a hard time eating fresh food. I'll move to a place where there is no enlightenment. The people are the grains, and all nations are governed."
"This is the Book of History. Yu Yu Mo and Houji went to sow seeds to provide grain and food for the people. They would develop trade and exchange what they needed, allowing the people to settle down and the nations to be effectively governed.”
"Those who speak are innocent, but those who hear are enough to warn.”
"In the Preface to the Book of Songs, the person who raised the criticism is not guilty. When you hear other people's criticism, you should reflect on yourself carefully. If you are wrong, you should correct it. If you are not wrong, you should treat it as advice.”
"The breadth of learning lies in tiredness, and tiredness lies in determination. This is Ge Hong's!"
“……”
Yao Ruiyi asked a lot of questions about ancient poetry, and Xu Heng answered them all fluently.
Some even translated.
Yao Ruiyi was listening to Xu Heng's words. Why was there a tapping sound?
Yao Ruiyi went back and listened carefully again. She was sure that every voice message was there.
"Is this…the sound of a keyboard?"
"It's the sound of typing on the keyboard!"
Yao Ruiyi asked," Xu Heng, where are you…?”
Yue Pingting took out her phone and snapped a photo.
"He's playing games, Teacher!"
Playing games?
Multitasking?
You can even answer my questions fluently?
Yao Ruiyi's head was buzzing.
She held her head and looked at the photo in disbelief.
After that, Yue Pingting sent a Short videos.
Xu Heng was controlling the mouse and keyboard in an orderly manner.
This steadiness reminded Yao Ruiyi of a pianist playing the piano.
Calm and steady!
Indifferent!
Elegant!
Yao Ruiyi muttered to herself.
"Your fingers are so long and slender.”
"Wait! Yao Ruiyi, what are you thinking?"
"We're doomed! I've completely fallen for you!"
"Hiss…Xu Heng, how much more perverted can you be?”
"I'm sorry! I underestimated your ability!”
"This is simply not human!"
Yao Ruiyi didn't know what to do.
She picked up her phone and replied," Let Xu Heng finish first. I'll consult him later."”
Yue Pingting passed on Yao Ruiyi's words. Xu Heng was indifferent." It's fine. It won't affect me."”
Yue Pingting replied.
Yao Ruiyi was speechless.
It was too awesome!
If it were anyone else, this would be acting like he was 13!
But the other party was Xu Heng!
Yao Ruiyi could almost imagine how calm Xu Heng was when he said that. He even had a pair of dead fish eyes that were unperturbed.
"Gasp…Gasp!"
Yao Ruiyi said," Alright!"
"Then I'll be rich!"
"I've been doing some research recently."
"Xu Heng, I have a few homonyms in classical Chinese.”
"Di Enemy"
He is the younger brother of the Emperor. She is the daughter of the emperor. He built a low dike and slandered the emperor. The emperor handed over his younger brother Li Di to slander him, and his younger brother Li Di looked down on him, and the emperor lifted his younger brother.
The Di people arrived and cleaned up the land of the emperor. The younger brother of the emperor, Di Di, fought against the Di people and arrived at the Di residence. The emperor came to his brother's house and bowed to the emperor. The emperor bowed and bowed.
Hedgehog Surround Wei
Wei Wei was besieged by hedgehogs, Wei was in danger, Wei Wei was entrusted to Wei Wei. Wei Wei secretly said to Wei Wei: Are you afraid of hedgehogs? Wei Wei said to Wei Wei: I am a little afraid. Wei Wei slowly comforted Wei: Hedgehog Wei is false Wei, hedgehog stomach is small, feed hedgehog reed, hedgehog stomach disobeys. The stomach disobeys the hedgehog's power, only fears Wei. Wei Wei comfort, said to Wei: Wei Wei is not afraid of hedgehogs, for Wei Wei simmer hedgehog taste!
Two chapters!
……
This book comes from：m.funovel.com。