Chapter 192 (2/2)

”Yes.” Jiangqinghua suddenly raised his hand. ”This How much is the third line of province? ”

”This No one cares... ” ”Tao Fei scratched his head.” ten twenty? It's almost that. ”

”I understand.” Jiang Qinghua said, also took out his calculator, ”I am 20 points to work on it.”

Li Zheng looks at jiangqinghua, who seems to have a determination. Somehow, he sees the teacher Mengxi once in a trance.

If you talk about it, the score will probably be a number

Tao Feifei was not good at attacking jiangqinghua. He got up and started the test paper. On the first hand, he pushed Lin yuejing: ”yuejing, my expectation for you is 65. This score can guarantee the provincial team, and there are four months to review.”

”Well.” Lin Passover Jing took over the paper and was absorbed in her language ability.

After that, Tao gave Li Zheng the second volume: ”Li Zheng, this paper has entered the talent selection stage. Considering that you haven't started systematic competition study, my requirement for you is 35 points. As long as you are above this score, I am confident to take you to the provincial team.”

”Go all out!” Li Zheng had heard the nostrils burning.

It's teacher Tao who is the mother. This is more overbearing than my old son.

35 points right?

I have been mixing for so long, but I should fight for this humiliating score?

Come on, but see how abusive the problem is.

Finally, Tao sent the third volume to jiangqinghua.

”20 points are too difficult. 14 points. We will save three points for 14.”

”OK!” Jiang Qinghua is excited to pull out his pen.

”If it's less than 14 points...” ”I hope you will put in the college entrance examination review soon, so don't think about the competition again.”

”Ah...” Jiangqinghua sighed with a sigh.

It's only at this point that I realize it.

The original purpose of this examination.

It's to persuade yourself.

Jiangqinghua can not help but have a red eye.

I have been studying for two months. Is it so unbearable for me, Mr Tao?

I've been rotten with the Russian demon problem.

Damn it, No.

14 points.

There is always a way to get it for 14 points.

In this regard, the three men ”to” crush Li Zheng, determine absolute status ”, in order to” more victories with Lin Yue Jing ”and” prove themselves ”.

At the same time, the tension was launched.

For a while, there was only the sound of paper rubbing in the office.

Tao Fei didn't care about it, so he went to water and continued tea.

In the office, Li Zheng has no hesitation to start thinking acceleration.

112 times the speed.

Unseal!

There are two main fusion processes in the sun: carbon cycle and proton proton cycle. 】It was just read here.

Li Zheng doesn't feel right

Should it be a small cart, a ball floating water, spring force, etc

How to play nuclear fusion as soon as I came up

[among them, carbon cycle was proposed by Betty in 1938, and the carbon cycle reaction process is shown in the figure. 】In the figure, P, +e and en respectively represent protons, positron and electron neutrinos.

Lizheng is gradually flustered, by the way.

It is a circular cycle diagram composed of carbon-12, nitrogen-13, unknown substance y, N-14, unknown x, N-15 and six substances, which is connected at the beginning and end, explaining the carbon cycle process inside the sun.

During this process, each step is accompanied by the entry and exit of protons, electrons and neutrinos.

It is a physical process.

Li Zheng has produced a chemical ring.

He shook his head in fright.

No, the chemical poisoning is too deep.

Gtmd is in a circle.

After he waved off zhouchenghuan's smiling face, he continued to examine the problem.

The more trial, the more panic.

The subject has finally become this kind of thing -

br > the mass of +e, P and he nuclei are known to be 0.511mevc2, 1.0078u and 4.0026u (1U ≈ 931.494mevc2)] br > br > br > write out the nuclides represented by X and y. 】It is inevitable that Li Zheng, who has finished the examination, is a little sluggish when he finishes the examination.Is this really a question high school students should explore?

Is the span between the preliminaries and the rematch questions too terrifying?

Steady, steady.

Although this type of question has never been seen.

But since we are here, we should have a solution with our present physical knowledge.

Look at the picture carefully

Although terrifying, the process is nothing more than the entry and exit of protons, electrons and neutrinos.

Every substance is made up of these things.

Think of these, Li Zheng once gnawed countless chemical knowledge also came out, especially ”Physical Chemistry” part.

As long as the proton, electron and neutrino of X and y are calculated according to the steps, the element inference can be carried out.

Following the cycle shown in the diagram, Li Zheng first saw that y, after adding a proton, became nitrogen-14.

Nitrogen-14 consists of seven protons and seven neutrons, which means that y is one proton less than nitrogen-14.

In other words, the proton number of Y is 6.

Here, the moment became junior high school chemistry.

The number of protons determines the type of elements, and the number of protons corresponding to 6 can only be carbon.

In addition, in addition to six protons, y has seven neutrons.

Therefore, y = carbon-13.

Li Zheng didn't even stare.

Oh!

It just looks terrible.

Do it steady. You can get it.

Following this method, he also easily concluded that x is oxygen-15.

The first question has been solved and the whole carbon cycle has been understood.

Second, the nuclear reaction equation required to be written has gradually become a sub problem.

So, the difficulty is only the third question, calculating the energy release of the whole process.

If you look at this problem, it's full of protons and neutrinos going in and out, so you can calculate the energy released.

Why not?

Einstein's explosive head couldn't be held down.

E = MC2 hello.

(the released energy = the square of the Mass X-ray speed)

only the total mass m of the lost material needs to be calculated.

A total of four protons, one helium-4, and two positrons were lost.

At this time, scan to ”0.511mevc2”, ”1.0078u and 4.0026u”.

It doesn't give us all the quality.

For the convenience of calculation, even the square of the speed of light is put on the denominator for you.

As for MeV, it's a unit of energy, which represents megaelectron volts (EV). It's a pure unit, no matter what.

Therefore, you just need to list the formula on the answer sheet, open the calculator, and then you can get the final answer -

25.619mev.

WOW!

The nuclear reaction inside the sun has unraveled.

This is the life of a carbon cycle fusion!

Think of the sun's interior, an ordinary carbon atom, which has been repeating this process for 4.6 billion years.

Li Zheng couldn't help but feel excited.

At the same time, he closed his eyes in silence.

Listen to the wind.

Back.

Learning is wonderful.

The beauty of physics.

It's all back.

This is my natural physics.

Don't be afraid of the horrible topics.

Face it bravely.

Even if it's Lin qiojing, I'll show you.

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