I don't know if something else happened, after Yao Daoyou went, he went into the sea like a mud cow and had no news. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

It felt like a long, long time had passed in the library pavilion, and Yao Daoyou had not returned with more people.

Since Liu Daoyou did not intend to expose Dr. Wu's absurd but politically correct lie to his face, then Dr. Wu's "Excerpts from the Book of Heaven" speech continued.

Kuai Fei's scheming and eyesight are not particularly sharp, so he didn't see that Liu Daoyou was completely pretending to listen to his ears and "Gong".

It took a long time for the old elder to finally popularize the working principle of Big Ben in the UK in the way of junior high school students.

Then he also painstakingly emphasized the importance of the nautical clock to the longitude two or three times in a row.

Needless to say, there is no need to say much about the question of latitude. In the Han, Jin, Southern and Northern Dynasties, Sui and Tang dynasties, Chinese Taoist priests, monks, and Qintian supervisors have long understood the mystery of accurate measurement of latitude.

Latitude is measured only with a larger sundial, which falls at noon every day.

The shadow of the sun at noon is the shortest and easiest to calibrate. And then in fact the inclination of the sun at noon every day shifts a little bit. The summer solstice has the smallest offset and the winter solstice has the largest shift. It is easy to measure the day of return and the day of return to the south.

The accuracy depends on the size of the sundial. The larger the plate, the more accurate the measurement.

Guo Shoujing was probably the best at playing this in the Mengyuan era. The great Mong-Han scientists even adopted the principle of imaging the small hole at the top of the obelisk, allowing sunlight to pass through a small hole, project it farther away, and focus it into a more precise and eye-catching spot of light. This is equivalent to saving the cost of manufacturing a giant sundial, and the measurement effect of the world's largest sundial is produced.

(Of course, Mr. Guo has no way to overcome the troubles of thermal expansion and contraction, and ultimately has to rely on the cumulative average of consecutive years to offset the thermal expansion and contraction error.) ）

Longitude is much more difficult to measure than latitude.

Kuai Fei won't go into detail here. If you elaborate further, you'll be helped.

In fact, he couldn't understand what the specific mechanism was in this navigation clock.

All he knew was that in order to accurately divide the time zone (the time zone is also the longitude), the marine clock had to overcome the two problems of thermal expansion and contraction, and turbulence at sea, which could easily lead to timing errors.

To overcome thermal expansion and contraction, Big Ben relies on its size, while Swiss watches rely on double hairspring balance traction and maximum refinement in metalworking details.

To overcome the error caused by bumps and shaking, it is said that it relies on a gyroscope-like self-rotation system. The nautical clock is cleverly suspended in the center of an endlessly rotating spherical frame similar to an armillary sphere. Use centrifugal force and centripetal force or something to get rid of the interference caused by gravity.

This is obviously beyond the curriculum of junior high school physics. It seems that high school physics is also superb?

That's why Fei Ge wittily sold such a pass...... In fact, Fei Ge only knows these parts that are not out of the ordinary, and it is enough to deal with the past......

"You see, that's how it works. The physical meaning of centripetal force, centrifugal force, etc., is really very profound. It's normal for you to not understand at the moment. It involves all kinds of detailed mysteries and specific solutions, all of which are in these three volumes. ”

Anyway, these three books can't be found here at all. You can't take it out of space until the system is restored.

It's free bragging time, and no one can contradict me, Wu Aotian.

This should be enough to arouse the great interest of the scientists of the Northern Song Dynasty, right? Liu Daoyou should believe that the three volumes of the Book of Heaven are worth the exchange price, right?

"Fulfill my three wishes, and you will get three heavenly books."

Fei Ge means to force the other party to provide benefits first, and then pay for it afterwards. This is obviously not in line with the general principle of one hand to pay and one hand to deliver the market. It is for this reason that it is necessary to sell as many of the benefits of this book as possible. If the attraction of the book is not enough, no one will agree to such a skewed trading method.

Liu Daoyou was slightly surprised: "You have three wishes? I just said just two. Pls the third one is ......"

In fact, our Phineas don't have a third wish at all.

The three wishes or something are completely out of the tongue. It seems that as long as similar topics are involved in any plot, there are usually three, and I have never seen two or four versions.

Kuai Fei's life is so short, and it doesn't open up any broad situation.

Speaking of which, he felt that he had had a karma bond, and when he touched his conscience, he felt that he had to help the target people, that is, Wu Song and Ah Lian.

There is no need for a reason to help Wu Song.

To help Ah Lian is mainly embarrassed. A girl like Ah Lian is not looked down upon by advanced humans in the 21st century. Whoever dares to take such a girl home to try it will definitely be decisively beaten to death by her parents, grandparents, three aunts and six cousins.

If I had thought of such a mismatch that night, I shouldn't have peeped at her, let alone blown it to her.

It's too late to regret it.

Hence the embarrassment.

Fortunately, Wu Dalang has now become a little paper man, and this problem has been properly solved. Seek more material benefits for Ah Lian, and then make sure that she will not be sold again, and this matter will be perfectly settled.

So, there are only these two wishes, and there is no third.

Sun Shengli and Lu Aotian, as well as Li Qingzhao, Liang Hongyu, Zhao Yanqing, Li Zhenyi, Fan Chun, Lin Lingsu, Zhang Ruxue, etc., are all one-sided, and they can't talk about friendship. Wu Dalang did not owe these people any favors.

On the contrary, Xiao Lao Fan is not very kind to me Dr. Wu. It is he who owes me, and I do not owe it to the country.

So, this third wish is actually non-existent.

Be sure to find a piece of content to make up the numbers......

My heart suddenly moved, and I remembered such a stalk......

"My third wish, well, just say it's a last wish. That is, Liu Daoyou, the time limit for you to comprehend the three volumes of the Book of Heaven is five years. After five years, no matter how many percent of the mysteries in the Book of Heaven are comprehended, they will end here. You must pass on these three books of heaven to another person for me. ”

In fact, at this moment, these three volumes of the Heavenly Book are completely blank, and there is no mystery about centripetal force and centrifugal force that Dr. Wu boasted about.

However, Liu Daoyou's protection of Ah Lian, once this commitment is confirmed and implemented, it will be implemented for a long time. Wu Dalang temporarily deceived the ancients, not only did not constitute any welfare for Ah Lian, but pulled out a lot of hatred.

Regarding such a technical detail, we Feige said that we have confidence and do not need to worry.

Anyway, he wanted Liu Daoyou to help achieve his wish first.

Dr. Wu's so-called dead soul said that he would be willing to officially deliver the three volumes of the Book of Heaven after observing it for a period of time.

The time difference in the middle is just enough to copy the test points of the relevant junior high school physics class mentioned today in the same way as Jiuyang in the Lengyan Sutra. Then there will be no problems at all.

Considering that Liu Daoyou pays the bill first and then picks up the goods, Dr. Wu can even send some junior high school chemistry jokes for free.

After this interaction with Liu Daoyou, Fei Ge deeply realized that junior high school physics is really not powerful, and there are few practical scoring points for the people of the Great Song Dynasty.

Those courses in junior high school are more useful, or a few chemical formulas are more useful.

……