Become a master from now on

Chapter 321 Brother, please go slowly (seeking subscription monthly pass!)
Hey.

interesting.

But if you want to stump Fang Chao with only this level of difficulty, it's a bit whimsical.

Generally speaking, the difficulty of physics cannot be compared with that of mathematics. Mathematics is really tricky and can trap Fang Chao for a long time. However, in terms of physics, so far, there is still no problem that can trap Fang Chao for more than 5 minutes. Going up, with Fang Chao's physical level, there is no pressure.

answer.

设想让压强P1=2x10七次方Pa，体积V1=2m的压缩空气都变成压强P2=9.5x10六次方Pa压缩气体，其体积为V2，根据玻马定律则有P1V1=P2V2。

排水过程中排出压强P2=9.5x10六次方Pa的压缩空气的体积V2’=V2-V1。

设潜水艇所在处的压强为P3，则压强P2=9.5x10六次方Pa，体积为V2’的压缩空气，变成压强为P3的空气的体积V3=10m
According to Poma's law, P2'V2=P3V3
Combined to get P3=2.1x10th power Pa
Let the depth of the seabed where the submarine is located be h, because P3=Po+pgh
Obtain h=200m.

Get it!

"Isn't it too difficult, it's just so-so."

"Forget it, next question."

The next problem is electromagnetism.

The research in physics, if it is small, it can be ions, atoms... and if it is big, they can even study the universe, stars, etc., all of which belong to the category of physics.

Naturally, physics is also divided into several major categories, such as mechanics, electromagnetism, thermodynamics, relativity, and quantum mechanics.

In addition, there are particle physics, nuclear physics, atomic and molecular physics, solid state physics, condensed matter physics, laser physics, plasma physics, geophysics, biophysics, astrophysics, etc. .

In terms of physics, it exists in every aspect of our life. Even if you sneeze now, it is also a physical reaction. Even if you are in a space, there are at least a dozen physical reactions that happen around you.

Now, physical scientists are also moving towards deeper physics efforts. They have begun to involve condensed matter physics, atomic, molecular and optical physics, and even high-energy physics, astrophysics, and super electromagnetic guns.

The mechanics placed in front of Fang Chao at this time made the corners of his mouth slightly raised.

Another sub-question.

No pressure.

When the contact knife of the double-pole double-throw switch is thrown to 1 and 2, the plate where S1 is located is connected to the negative pole of the power supply...

The radius of electrons doing uniform circular motion in a magnetic field is r1=d1/2=1.0cm
ev1B=mev1/r1
eU=1/2mev1-0
me=eBr1/2U
……

r2=(r2-d2)+d2
r2=73.5cm.

Let the mass of the positive ion be m,

m=eBr2/2U
m/me=(r2/r1)=5402
That is, m=5402me=5402/1800mp=3mp
Therefore, the number of protons and neutrons of the atoms that make up this gas is 1, and the gas atoms are fluorine, an isotope of hydrogen.

……

Time passed by minute by minute.

Fang Chao has less than two remaining physics questions. As long as he completes one more question, he can hand in the paper directly.

He believed in his own physical level, and it would be no problem to get a score of 148. Of the remaining two points, one point was deducted for fear of pride, and one point was deducted for being too aggressive.

Fang Chao has strictly controlled his total score between 148 and 150, so in this physics competition, there are only three options for Fang Chao's total score.

A:148.

B:149.

C:150.

As for what the final option will be, even someone as proficient in probability as Fang Chao is not absolutely sure.

The human heart is unpredictable, the sea water is difficult.

This is Fang Chao's shortcoming. He feels that he should study psychology if necessary. This kind of thing can definitely come in handy sometimes.

Just when Fang Chao was about to complete the last few steps of the last question, a student suddenly stood up in the classroom.

"Teacher, can I hand in the paper?"

This student is about 1.7 meters tall, wearing black-rimmed glasses, and a little fat, probably caused by long-term inactivity. There are some acne on his face from youth. I couldn't see any dazzling light, but who would have thought that such an inconspicuous person in Fang Chao's eyes would hand in the paper first, and he still had a small part that he hadn't completely answered, but the other party had already handed in the paper the point.

At this moment, the figure of the other party suddenly became stalwart.

There are people outside people, there are days outside the sky!
Sure enough, there are still strong people in this world.

I thought I would be the top of the mountain, looking at all the small mountains.

But I didn’t expect that my mountain is not the highest mountain in the world.

The mountain on the other side is still above me. I am here to watch the scenery, and the person watching the scenery is watching me upstairs.

hey~
Interesting~!

At this moment, Fang Chao had the idea of ​​getting to know each other.

After hearing what the other person said, the invigilator looked at the time and saw that half an hour had passed since the exam started. He could hand in the paper in advance. He immediately came to the other person and asked, "Are you sure you want to hand in the paper? Don't you want to check it again?" "

"No need for teacher."

"Okay then, pack your things and go outside the classroom, don't disturb the normal exams of other candidates."

"Yes."

"Oh my god, isn't it too pretentious? The physics competition took more than 40 minutes to hand in the paper? I must have done everything right, so I did some multiple-choice questions..."

"It must be. How can a physics competition be so easy? It's easy to be struck by lightning..."

"I'll just see what his final grades are, and I still want to pretend to be aggressive. Don't pretend to be shit when the time comes."

"Don't worry about him. Take care of yourself first. There isn't much time left. Although there is still more than an hour, can you really answer the next question in 10 minutes?"

"Fuck!!"

"..."

When some examinees saw that the man with glasses handed in the papers early, they all felt disgusted.

Fang Chao took advantage of the short few minutes to answer quickly, and solved all five questions in 2 minutes. After that, he stood up and said, "Teacher, I have to hand in the paper too."

The invigilator frowned and asked again, "Are you handing in the paper too?"

He doesn't want the class he invigilates to have so few students who hand in papers early, after all physics is rigorous, no matter how good you are, how many points can you get if you hand in papers early?Do you really think you are a genius?Or do you think some of you have a freaky slugger like IMO events?

Fang Chao nodded, "Yeah."

The invigilator said, "No more checks?"

Fang Chao said, "No need."

"Okay, if you want to hand in the paper, hand it in."

Fang Chao handed in the test paper. Seeing that the man with glasses packed up his things and was about to leave, Fang Chao hurriedly called him back, "Brother, please stay."

He hadn't packed up his things yet, so how could he just watch the other person leave.

(End of this chapter)