Jin Zixuan was in pain, thinking about whether to cross the border again.

Math doesn't work.

Physics doesn't.

Didn't he say that he could only switch to liberal arts? When the time comes, I will study the Department of History, Literature or Archaeology in the Northern Qing Dynasty, etc.?

It's just that if that's the case, will Qingbei still want him?

There are many people who are stronger than him in the liberal arts, and the reason why he was escorted by Qingbei is not because of his performance in the IO event? If you switch to liberal arts because of this, I'm afraid you won't be directly shot to death by the bigwigs in Qingbei.

Kids, do you have a lot of question marks?

Yes, before the physics competition began, Jin Zixuan's mind was full of question marks, and he was full of confusion about the future, not knowing where to go.

……

The CPO event is coming as scheduled.

On this day, the weather quality in Shangjing is good, the rare blue sky, only a little haze floating in the sky, such a day for Shangjing, it is simply the best time to go shopping, some people have painted beautiful makeup, and those who have boyfriends bring their boyfriends, they rely on their good figures to appear on Wangfujing Street, waiting for the people to take pictures to send them to Weibo hot search.

Naturally, there are also some students gathered in groups, they appeared at the door of the milk tea shop, each holding a cup of three-point sweet ice milk tea, even if the little sister came, they were not worried.

This type of person is unrestrained, and at least for the time being, there is only one happiness and joy in their hearts.

At the same time, more than 300 candidates from a university in Shangjing were assigned to different teachers.

There are 20 people in each class, close to more than 20 classes, and there are three to four invigilators in each class, these invigilators are also teachers from different colleges and universities in Shangjing, and there are also teachers from neighboring provinces to participate in the invigilation.

Fang Chao was placed in a senior class, and every candidate had been searched before the exam to ensure that there was no communication device or substitute test on his body.

After all, the National High School Physics Competition belongs to the competition of high intellectuals, unlike the high school entrance examination and the college entrance examination, which is attended by the whole people, there are a large number of candidates every year, similar to the examination that exists in the form of competitions, although it is not as rigorous as the high school entrance examination and the college entrance examination, but after all, it is an academic examination, if you don't have some real skills, even if you borrow high technology, it is useless, and the questions of the competition can only be answered by some masters.

If you take the English test, you will at least have a chance in the multiple-choice questions, but in physics and mathematics, they just know that the answer is still useless, and it must have the idea and the steps to solve the problem.

In a class of more than 20 people, there were three invigilators, and Fang Chao sat in the second row in the middle.

In the case of physics competitions, the proportion of boys who take the test is much higher than that of girls, and even higher than the proportion of mathematics competitions.

The ratio of male to female contestants in mathematics competitions can be 8:2, while in physics competitions, it can be achieved at least 13:2.

At this point, Fang Chao has a personal experience, during the math competition, there are at least five girls in a class, and in the physics competition, the number of girls is only two, and even in terms of appearance.

Harm.

Don't mention it.

Fang Chao is a person with a girlfriend, not to mention that his girlfriend is so good-looking and has long legs, how dare he have other thoughts to think about some inconsequential things.

The rolls were quickly distributed.

Physics is different from mathematics, there are many tools that need to be worn in mathematics, such as compasses, rulers, triangular rulers, etc., while in physics, it only allows you to carry an ordinary calculator.

The physics paper is divided into three parts, of which the first part is multiple-choice questions, the second part is solution questions, and the third part is application questions.

Fang Chao quickly reviewed the papers, which was an indispensable part of the exam.

1. This question includes 11 questions, and candidates only need to do 10 questions, each question is worth 5 points, a total of 50 points. Among the four options given in each question, some questions have only one option, and some questions have multiple correct options, please fill in the serial number of the option that meets the requirements of the question (inside) after the question. 5 points for all correct selections, 3 points for incomplete selections, and no points for incorrect or incomplete selections.

"It turns out that there are multiple choice questions."

Fang Chao muttered, and quickly devoted himself to the topic.

The first question is buoyancy.

Choose C.

There is no other correct answer, it is a multiple-choice question.

The second question.

Pick B.

Again, it's not a multiple-choice question.

The third question.

Choose A.

It's not a multiple-choice question.

Question 4.

Choose A, D.

"I'm almost going to miss you, but fortunately, no matter how deep you hide, you can't escape my golden eyes."

Fang Chao didn't know how many strong people there were in the national finals, but his physical level was not low, and it was easy enough to deal with such a situation.

And in a few months, as long as his academic score breaks through the million mark, then he will upgrade his physics level to lv4, so he is fearless in the face of international physics competitions.

Six minutes later, Fang Chao had completed eleven multiple-choice questions, and the extra question was considered a gift.

The second part is a short-answer question, which is also a five-question question, and candidates only need to make four questions.

As with multiple-choice questions, except for the last two questions, all questions are compulsory, and those who choose one of the last two questions to answer both questions will be given points for the previous question as the answer.

1 (10 minutes) Under the action of the water pump, the water jet sprays vertically upwards with the rhythm of the music, and the water jets of different thicknesses and heights form a wonderful landscape. In fact, when we look closely, we will find that when the flow rate of the nozzle is the same and there is no wind, the water column is not uniform in the rising stage in the air, but thick at one end and thin at the other end in the vertical direction. Please explain whether the water column is thicker at the top or at the bottom during the ascending phase, and explain why the water column has this pattern.

"Thickness? This topic is so obscene~"

Fang Chao thought so in his heart, but the movements in his hands were not slow at all.

Answer: The flow rate of water ejected from the nozzle q=sovo is a fixed value, that is, the initial velocity of the water ejection is the same.

The volume of water per unit time remains unchanged q=sovo=s1v1, with the upward movement of water, v1 is constantly changing, and the cross-sectional area s1 is increasing, so the shape of the water column in the rising stage is thicker at the upper end.

"Hmph, that's it!"

This is the case with short-answer questions, as long as you can know the general rules, there is no need for special calculations, the difficulty is not high, and it is simply easy for a player like Fang Chao.

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