Then Mordin didn't know what kind of magic he had made, and the Void Sword suddenly became as small as an embroidery needle, and was held in the palm of his right hand by Mordin: "And it has become so small, but it is as light as a feather! Where is its mass? This is not scientific! It violates the laws of physics!"

"You noticed that it got bigger, so it got heavier, it got smaller, so it got lighter, didn't you?" said the Qingxu Dao Chief, still keeping that posture unchanged.

"Yes, I tossed and turned all night, and I didn't figure it out, its size can change at will, I can understand this, but the mass of an object is conserved, and it can't change its mass to be lost!" said Mordin indignantly.

"It's not necessarily a good idea. Qingxu Dao Chang raised his head, the plaster on his face was gone, but his hair and eyebrows would not grow for a while, and the short braids were tied behind his head, which still looked a little funny.

Qingxu Dao Chang reached out and took the needle-like Void Self Sword from Mo Ding's palm and put it on the table, smiled at Mo Ding and said, "You pick it up again and try it." ”

Mordine didn't know why, and stretched out his right hand to take the embroidery needle, but the embroidery needle didn't move!

"Forget it, you can't pick it up like this, so you might as well lift the table together. The Qingxu Daoist on the side said to Mordin with a smile.

Mordin looked at his master, his hands on the edge of the table, and with a strain of his arms, he tried to overturn the table. But to his surprise, the legs of the table seemed to have taken root, nailed to the ground, and no matter how much strength he tried, the table could not be lifted at all!

"Now it's 2 tons, and your law of invariance is back!"

Mordin: ......

Due to the excessive force, a grain of Venus appeared in front of his eyes.

"Don't expect the master to tell you why, you can take it back and think about it yourself!"

In nature, the mass of an object is constant, and when it changes from a solid state to a liquid or gaseous state, the mass does not change. Even if the shape of an object changes due to chemical reactions such as combustion, rust, and weathering, all of its atomic mass will not disappear for no reason.

The law of conservation of mass is the basis for the existence of this world, and without this most basic law of physics, the operation of the entire universe will be chaotic, the planets will no longer exist, the solar system will no longer exist, the Milky Way will no longer exist, and human beings will not exist.

Even when there is a nuclear reaction such as fission of heavy nuclear matter and fusion of light nuclear matter, a very small amount of material mass is converted into so-called energy, such as light energy and high-energy particles, but in fact, in essence, only the form of matter has changed, and the mass has been transformed from the form of macroscopic objects to the form of microscopic particles, and the law of conservation of mass still holds.

The basis for the stable functioning of our world is a number of conservation laws. Although change is an eternal and unchanging truth, the relatively stable laws of nature are the basis for our survival. If a mountain weighing billions of tons suddenly loses its mass and becomes lighter, and when a gust of wind blows, it will fly like a feather in the sky, what a terrifying sight it will be! If a container cargo suddenly becomes very heavy, then the 10,000-ton ship carrying it will sink to the bottom of the sea in an instant.

And now, these laws of nature, in the hands of cultivators, have become Rubik's cubes that can be changed at will. The shape of an object can be changed, the size can be changed, the weight can be changed,

A sword weighing several tons can be suspended in mid-air without any support, without any external force.

Its speed can change from zero to rapid speed, or it can suddenly come to a standstill, and all these changes come from the mind of the cultivator alone, and with the mind can drive away, can break the law of conservation in nature, is there anything more incredible than this?

From the cultivation of the Taixu Exercise to the present, Mo Ding has experienced many incredible things, but none of them have caused Mo Ding to fall into such chaos. For example, visualization, such as the knowledge of the sea, such as the appearance of the god of breath, in Mordin's view, all belong to a kind of spiritual cultivation, a kind of virtual category. Later, he changed the genetic structure through his mind, and modified his muscles, heart, blood circulation and other body structures, so that he obtained far more power than ordinary people, which also belongs to a mode of action of the brain and nervous system to control changes in the body, and does not go beyond the basic scope of material forces.

Mordin, a teenager who grew up with a modern scientific education, learned physics knowledge that taught him that the basic structural unit of an object is the atom, and the structure of the atoms is extremely stable, they constitute molecules, and the forces between molecules constitute a stable structure of matter.

Without the action of external forces, it is impossible to change the shape, size, velocity, temperature and other physical quantities of objects, and these physical laws have been certified by countless scientific experiments and tested by life practice, which are correct and should not be subverted.

Looking at the Void Self Sword suspended motionless in mid-air, Mordin fell into confusion.

At this time, the Void Self Sword was about 1 foot long, and if it was not controlled by the mind, it should weigh about 300 kilograms, which was much heavier than an ordinary steel sword. The sunlight outside the window shone on the crystal like the sword, reflecting the colorful light. If you push it lightly with your hand, the blade will move slowly, and it will stop when it hits the wall, and if the tip of the sword is facing the wall, it will leave a deep insertion mark on the wall.

"Why does the mass change, and where does the kinetic energy that drives it to produce displacement come from?" Mordin imagined countless possibilities, and even thought of the drive of dark matter and dark energy, and did all kinds of experiments, but in the end there were no results. It seems that the cultivator's methods are very understandable, and Mo Ding decided to put these problems aside for a while, and when he breaks through to the Yuan Shen Realm, when the time comes, the cultivation will naturally solve all the mysteries.

The next step is to consider how skillfully you can drive the Void Self Sword.

In his sea of consciousness, the Void Self Sword was suspended in mid-air, and he could use his mind to drive the Void Self Sword back and forth. But he soon discovered a problem, that is, the brain's thinking could not keep up with the changes in the sea of knowledge, resulting in a sense of orientation in the sea of knowledge that was inconsistent with the direction of the real world.

Although the direction of east, west, north and south can also be artificially defined in Zhihai, Zhihai is moving with the change of Mordin's figure, just like the navigation map in the car, the top of the screen is specified as the north, but in the actual driving process, the direction of the front of the car is constantly changing, which will lead to a sense of confusion in the direction.