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

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Zhou Luzhe, "???"

What the hell!

what's the situation?

Why did the door open all the way?

So arrogant!

Just when Zhou Luzhe was puzzled, the guard came to him with a cigarette.

"Oh! It's not that the flood has washed into the Dragon King Temple, the family doesn't know the family anymore!"

"If you want to say that you are here to see off classmate Xu Heng, wouldn't it be fine?"

"Then you can still use cigarettes!"

"Come here, take one! Huazi! Huazi!"

"You're welcome! Come on!"

"Are you coming to our high school for the first time? Walk around and I will show you the way! Are you going to the class or the dormitory?"

"I will lead you wherever you go!"

Zhou Luzhe was dumbfounded, "This, this, what's going on? Xu Heng, this...?"

Xu Heng shrugged.

The guard immediately explained, "The principal told me! This place is like Xu Heng's home, you can come or leave anytime!"

Zhou Luzhe, "!!!"

Nima!

This privilege is given!

Super super super supreme VIP!

Zhou Luzhe couldn't help giving Xu Heng a thumbs up.

Come to the door of the dormitory.

As soon as Xu Heng came down, this old Yao came over in a hurry.

Xu Heng is a student and doesn't smoke, but the person who drove him here was a man, nine out of ten smokers!

In short, smoking is over!

Lao Yao immediately stepped forward, "Smoke, smoke!"

Zhou Luzhe, "???"

"thanks, thanks!"

Lao Yao was very enthusiastic, "You're welcome! You're welcome! It should be!"

"Student Xu Heng, is there anything I can do for you?"

"Let me help you!"

Xu Heng was carrying a big bag and a small bag, and said with a smile, "No need! Uncle, I will go back to the dormitory first, and you can go and do your work too!"

Zhou Luzhe was still in shock!

When he recovered, Xu Heng had already entered the dormitory.

Only Lao Yao was left with him.

As soon as Zhou Luzhe opened his mouth, "Housekeeper...?"

Lao Yao nodded.

Zhou Luzhe, "I'm just this nephew, please take care of me!"

Lao Yao immediately waved his hand, "You really upset me! I still count on Xu Heng to take care of you! Don't be kidding."

Zhou Luzhe, "Ah..."

When he left, the doorman had a smile on his face.

Just short of bowing at ninety degrees and lining up to see off.

Zhou Luzhe gasped, "Hey! My nephew! Promise!"

"If you haven't seen it with your own eyes, you can believe it!"

"hiss……!"

Zhou Luzhe left, and the company still has a lot of things waiting for him to do.

In the past few days, when Xu Heng was tutoring Zhou Xiaoya, Zhou Luzhe would ask Xu Heng if he had nothing to do.

Xu Heng knew everything he wanted to say, and he knew the key to every sentence.

Zhou Luzhe benefited a lot.

So next, he was busy with some things.

As for Xu Heng, after putting the new clothes in the dormitory, he went back to class leisurely.

Quietly returned to class through the back door, and sat down.

Yue Pingting, who was brushing the questions, felt that there was someone in the seat next to her, and turned her head suddenly.

clap la la...

Xu Heng is back!

Her eyes, which were originally dull, instantly brightened!

Yue Pingting was excited, and immediately murmured, "You're back!!!"

Xu Heng smiled at Yue Pingting.

Then he lay down and took out his phone.

Now is the time for class.

Everyone is earnestly studying on their own.

Xu Heng didn't bother anyone, he still played with himself.

Until get out of class is over!

After the students saw Xu Heng came back, they seemed to have found a savior!

"Xu Heng! You're back? I heard you didn't take the exam! But can you help us look at the questions?"

"There is a very difficult question on the math paper! Then..."

Before the students finished speaking, Xu Heng said, "I finished the math test paper with me, Yue Pingting, and she was right on the last question!"

Yue Pingting!

That's right!

clap la la...

Being personally approved by Xu Heng, everyone knows what it means!

Yue Pingting can even solve the last question!

This doesn't mean that she got a perfect score on the math test paper this time!

"hiss……"

"It's too scary!"

"Yang Kaixuan, what about you? You and Yue Pingting checked the math answers, right? How was your last question?"

"..."

Everyone was chattering, and it didn't take long before class started again.

Yue Pingting was still brushing the questions.

She is now brushing the questions, which are limited to the college entrance examination papers of various provinces!

As for Yang Kaixuan, he is still checking for omissions.

It is true that he and Yue Pingting matched the answers to the math problems, but other subjects are unknown.

Therefore, Yang Kaixuan is still comparing subjects one by one.

"Xu Heng, help me look at this physics problem."

"The last question of the monthly exam!"

Xu Heng turned his head.

topic:

There are two uniform magnetic fields perpendicular to the Oxy plane in space, the y-axis is the boundary of the two magnetic fields, and the magnetic inductions are 2B0 and 3B0 respectively.Two kinds of particles with different specific charges, A and B, are injected into the magnetic field from the origin O along the x-axis at the same time, with both speeds v.The positions of A passing through the y-axis for the first time and the second time are respectively P and Q, and their trajectories are shown in the figure.

When A passes through Q, B also passes through the point at the same time.

It is known that the mass of A is m and the charge is q.

Interactions between particles and gravitational effects are not considered.

begging:

(1) The distance d from Q to O;

(2) The time interval Δt between A passing through point P twice;

(3) The possible minimum value of specific charge q'/m' of B.

After reading the topic.

Xu Heng, "You should just want an answer, right?"

Picking up the pen and paper, Xu Heng wrote down:

d=(mv)/(3qB0)

t=(5πm)/(2qB0)