Of course, gravity does not change at will, because that is the prerequisite for human beings to live on Earth on which they depend.

With Lin Xuan and Tian Meng's knowledge of physics, of course they know the importance of gravity to the human world. Once this power changes abnormally, it will be a devastating disaster.

All objects with mass will have a force that attracts each other, and this force of the earth on other objects is called gravity, and the direction of gravity on other objects is in any direction. According to Newton's law of gravitation, there is a gravitational force between any two substances that have mass. The Earth itself has quite a large mass, so it also exhibits gravitational pull on any objects around the Earth. Take a cup as an example, the earth shows gravitational pull on the cup at any time, and the cup also shows gravitational pull on the earth. The mass of the earth is too large, and the gravitational force on the cup is very large relative to its own mass, and the acceleration is relatively large, so the cup is attracted to the direction of the center of the earth, and this force is gravity.

Physically subdivided, gravity is not equal to the gravitational pull of the earth on an object. Due to the rotation of the earth itself, except for the poles, objects in other places on the ground are moving in a uniform circular motion around the earth's axis along with the earth, which requires a centripetal force directed perpendicular to the earth's axis, and this centripetal force can only be provided by the gravitational force of the earth on the object.

It can also be said that the two concepts of "Earth's axis" and "gravity" are eternal, and they are the foundation of all physics, chemistry, biology and other disciplines with the birth of the earth, which is the foundation of all physics, chemistry, biology and other disciplines. To put it more simply, without gravity, the human world would not even have the concept of "weight" and would live entirely in a floating state of gravity, the same as astronauts in spaceships.

In the laboratory, physicists decompose the gravitational pull of the earth on the object into two components, one component F1, which points to the earth's axis and is equal to the centripetal force required for the object to move in a uniform circular motion around the earth's axis; The other component G is the gravitational force experienced by the object, where F1 = mw2r (w is the angular velocity of the earth's rotation and r is the radius of rotation of the object), which shows that the magnitude of F1 is zero at the poles, increases with the decrease of latitude, and is the largest in the equatorial region. Because the centripetal force of the object is very small, in general, it can be considered that the gravitational force of the object is the gravitational force, that is, in general, the effect of removing the rotation of the earth can be ignored.

In Lin Xuan's cognition, he can also judge that when anyone reaches the position of the earth's axis, their time will be in a state of "zero" motion, and they will not age or die, and will move synchronously with heaven, earth, universe, time and space. In other words, the person has already taken the "time train", and as long as the train does not stop, there will be no change in the person's life, forever young, and forever healthy.

That is the super high realm of "living with heaven and earth" that the ancient emperors most longed for.

When talking about gravity, we can't talk about the great scientist Mr. Newton.

The scientist Isaac Newton once went to the countryside and rested under an apple tree, when suddenly an apple fell from the tree and smashed on Newton's head. He thought that if the apple tree kept growing until it was as high as the moon, then the moon would be the apple. He wondered why apples would fall from the top and not from the bottom. Why doesn't the moon go down? He returned home with this question in mind, and later he discovered through argumentation that the earth has a gravitational pull and can attract objects. Subsequently, the "Newtonian physical gravitational mechanics" appeared, which also became a new beginning in physics.

It was only from this doctrine that mankind reflected on how gravitational differences in various parts of the planet arise.

In fact, a person weighs himself in the coastal areas of India, while in the southern part of the Pacific Ocean, you will be heavier. The reason for this discrepancy is being studied, and the GRACE twin satellite, launched by NASA in 2002, made detailed measurements of the Earth's gravitational field, which may help scientists find the cause of this gravitational disparity as soon as possible.

The problem that Lin Xuan really considered was: "If you stand at the top of the Himalayas and feel the change of gravity, and increase, the mountain range will sink faster; decreases, and the mountain uplift increases. So, what is the power hidden behind this change? ”

If this phenomenon is simply explained by "the collision of the earth's major plates", it will be meaningless in space.

As he walked towards the plane, his mind was always full of doubts about the future, and he couldn't figure it out.

Lin Xuan walked towards the passenger plane, his eyes flashing, scanning the surroundings.

It seems that the technicians will not pose a greater threat, and the gunners led by Dekaf are also in a state of leaderlessness. Perhaps, the one who is about to have an impact on the situation on the scene will be the master of the 51 region who rushed to receive Tian Meng's message.

In recent years, Lin Xuan and his organization have more or less intersected with the 51 region, and there have been several secret non-frontal collisions, but the contradictions have not intensified, and the international media have not reported them.

Fundamentally, he was reluctant to cooperate with people in the 51 area, but Tian Meng belonged to that organization. Everything can only be attributed to the fact that God does not make beauty and makes people happy.

He walked up the gangway quickly, saw that there was no one near him, and stepped directly into the plane.

Boeing 747 is a large commercial wide-body passenger and cargo transport aircraft launched by Boeing under the leadership of the United States Air Force at the end of the sixties of the last century, and is also the world's first wide-body civil aircraft, since it was put into service in 1970, before the Airbus A380 was put into service, Boeing 747 held the record of the world's highest passenger capacity aircraft for 37 years. The aircraft is the latest model of the Boeing 747, the 747-8, which officially entered service in 2011, and its mechanical performance is not in doubt.

Modern equipment is designed based on physics, electricity, and dynamics, and after countless reforms and innovations, and experimental summaries, it should be a fairly reliable combination of products, and there are very few fatal unexpected failures.

When the magic and metaphysics act at this time, the above scientific things will be greatly reduced, and all kinds of unbelievable problems will appear.

For example, the mid-air hovering of a jet cannot be achieved because that is a mechanical action that only a propeller helicopter can do. However, under the influence of some mysterious external force, the plane really achieved "hovering in the air and landing without a runway", and landed on the top of the mountain, making the technicians who rushed to the rescue helpless.

Therefore, after Lin Xuan boarded the plane, the muscles of his whole body tensed, ready to deal with all kinds of unexpected emergencies at any time.

There was an inexplicable smell in the cabin, as if someone had burned a large number of ancient documents in a closed office.

Lin Xuan covered his nose and walked to the cab.

"Hey, Lin Xuan, what are you doing here?" The magician sat in the cab and called.

Lin Xuan walked over without hesitation and looked at the magician.

"I don't have time yet, I still have a little time to think about. There are some twists in life that cannot be controlled by humans, they are quite complicated, and they are quite sad. The magician said to himself.

"Need help?" Lin Xuan asked.

The magician paused heavily with the pencil in his hand and poked a hole in the center of the stack of white paper on the table. With such force he used, the pencil pierced through the white paper, plunged into the small plastic table, and stood diagonally.

Lin Xuan noticed that the magician had scribbled a lot of lines on the paper, as if he was drawing a complicated maze of lines.

In the last moments of his life, the magician's state looks precarious.

"Help, help? You don't even know how complicated the situation is, how can you help? The magician sighed heavily, and there was a mournful resentment evident in his tone.

"It's man-made, no matter how difficult it is, you have to move forward, don't you?" Lin Xuan smiled and comforted the other party.

"That's you, not me." The magician shook his head.

This is not a contradiction, man is not God, and he cannot do the work of creation, starting point, tracing and so on that God did, but can only do everything to the best of his ability under the existing environment and conditions. Other than that, nothing can be done. The ancients said that it is up to man to plan things and to achieve things in heaven, isn't this exactly the truth? Lin Xuan asked.

"Haha-" The magician snorted gloomily, laughing from his mouth, but there was no smile on his face.

"You don't agree with me? What do you mean? I would like to hear about it. Lin Xuan said with a friendly smile.

"Area 51 is coming—" the magician sighed, "everything will be drawn into a deeper maelstrom, and this is a real battle, a battle of earth-shattering and jade-shattering. ”

"You're worried about that?" Lin Xuan asked.

The magician replied, "Isn't that enough?" Because I've personally been to the Nevada Air Force Base, and the layout inside is quite complex and quite clever. ”

Lin Xuan nodded, agreeing with the magician's words.

The organization has given Lin Xuan some information related to the 51 region, which is briefly excerpted below:

Located about 120 kilometers northwest of Las Vegas, about a two-hour drive, Area 51 covers an area of 144 square miles and is a dry riverbed in the Nevada desert. On the surface, the area looks like an ordinary air force test site consisting of aircraft hangars, storage warehouses and runways, but the satellite photos revealed and further observation show something clearly unusual.

In the photo, several mysterious craters can be clearly seen, some of which look as if they were formed by the impact of objects from outer space. What stands out in the photo is a runway more than three miles long in the southern part of the area, flanked by several hangars, several of which are very large in shape, with white-painted roofs that look like open white umbrellas from the air. Notable additions include a massive air traffic control antenna with a rectangular base that is 400 feet long, while the antenna itself is 150 feet high, so it can be seen from up to 12 miles away in clear weather. All in all, the above two points make this Air Force bomber base look more like a typical virtual scene in a science fiction movie than a typical military base. In the photo, the main branch road in some areas mysteriously disappeared at the edge of the cliff, suggesting that there is an underground transportation network at the base. In addition, almost all sensitive parts of the base and warplanes were covered, indicating that the US Air Force knew that spy satellites of other superpowers would definitely fly over its bases.

When it comes to the 51 region, there is a lot of sensitive content, and I am afraid that even hundreds of pages will not be able to explain its true meaning. In short, Area 51 is a special unit independent of the military, political, judicial, and civilian of the United States.

Since the magician was so jealous of Area 51, Lin Xuan had already reached the point where he couldn't help but speak.

This book was first published from 17K, the first time to see the genuine content!

#includevirtual="/fragment/6/3236.html".qrcode{width:590px; margin:0auto; background:#fff; border:1pxsolidc; padding:15px20px; overflow:hidden; }.qrcodeimg{float:left; }.qrcodeul{margin-left:120px; font:14px/1.5"MicrosoftYahei"; padding-left:15px; }.qrcodeli{list-style:square; margin-bottom:5px; }

Scan the QR code to pay attention to 17K's official WeChat, and the latest chapters can also be seen on WeChat! Click on the + sign in the upper right corner of WeChat, select Add Friends, and search for the official account "wap_17K" to follow us. Reply to "Grand Prize + Your QQ Number" to participate in the event. 10 iphone6, 10,000 QQ members are waiting for you!