The game is a pile of cards placed on the ground, slapped down with the palm of your hand, and then quickly lifted, and when you lift it, the palm of your hand slightly concave brings out the suction, and the paper on the ground is overturned. See who flips the cards the most.

In elementary school, it is not uncommon to see a group of boys lying on the ground with their dirty palms on the ground during recess. The principle is that after lifting the palm, the palm is concave to form a low-pressure area, and then it is suddenly lifted to lift the paper on the ground. (If the young masters who have been accompanied by the handheld computer since childhood may think this is a bit mysterious, please understand the childhood of civilians.) ）

The analysis of the physical phenomenon of this little kid slapping on the ground with his flesh involves very complex knowledge, which sounds very high-end and looks very inconsistent. But the laws of physics are just as Zhuangzi said: "The Tao is in the rubble"

The physical laws in the small phenomena should not be ignored because of the magnitude of energy, when the magnitude of energy is raised to the point where it deserves anyone's attention, it will be found that those inconspicuous phenomena and magnificent phenomena actually follow a physical law.

Throwing a stone and splashing ripples on the water surface, and the one-meter-high water wave set off by the side of the 10,000-ton giant ship is two orders of magnitude.

The flames burning on the lawn at the entrance and the flames of the forest fire instantly boiling the high-pressure water pump into a flame of high-heat steam are two orders of magnitude.

And now Lu Jiuzhong is trying to shoot a pop, and his "hands" are much bigger than those of children.

On Lu Jiuzhong's face, a very sci-fi holographic glasses were added to the bridge of his nose, and Lu Jiuzhong started to operate under the information prompting on the upper shadow of the glasses lens.

At first, he just created a disorderly wind on the ground. It is clear that the initial attempt was a failure.

But then this disorderly wind became shorter and shorter. The time is getting shorter and shorter, and the wind is getting faster and faster. Lu Jiuzhong made more than 20 attempts, and each attempt of holographic projection would show that his gravitational operation had some shortcomings in time, so that the air mass he dragged with gravity disintegrated under the action of external air pressure due to the long time of force, or the uneven force, and the consequence of the disintegration was that the low pressure area below the air mass caused a wave of rapid turbulence and strong winds.

Air has mass, and one cubic meter is 1.29 kilograms, but air is different from solids, it is a fluid, and the fluid is very easy to collapse under the external force when it is subjected to uneven external force.

Lu Jiuzhong had never tried to change the gravitational effect of the air and the earth before, because when he changed the gravitational strength and direction of a piece of air, the air would quickly collapse into the surrounding air, which made him feel like picking up a piece of fine sand, and he couldn't use force, so he had been projecting rocks, metals and other massive solids all along. However, the gravitational force that his superpower can change can only reach a maximum of 5 g when exploding, and only two g when projecting huge rocks. Although Lu Jiuzhong's super energy can almost achieve a salvo of thousands of trebuchets, the output of energy is not violent enough.

And now Lu An is now providing Lu Jiuzhong with a glasses device, unlike Li Xingji's majestic armor, this glasses look sci-fi like a motorcyclist's windproof glasses. But the unprecedented holographic projection of the opposite in front of this spectacle would give Lu Jiuzhong a reminder of the deformation effect of the air when his super energy acts on a large area of air. Air is fluid, but for a very short period of time, air can be seen as a spring.

When the gravitational pull of a large area of air changes suddenly, every cubic meter of air will inevitably be deformed by the gravitational change. Although the elastic potential energy contained in each cubic meter of air is very weak, as long as all the air points the direction of the elastic potential energy rebound, the rebound time is as short as possible. This creates an air explosion.

Blow the milk bag full of air and stomp on it to make a snapping sound. It is the concentrated release of the air in the milk bag at the location of the breach.

After Lu Jiuzhong twenty-one times, a bang sounded on this uninhabited beach.

The ground looks like a white light flashes on the relatively flat ground, but in fact there is no light, this is a strong shock wave of two hundred meters per second hitting the ground, which is a steel body relative to the air, and a large amount of dust on the surface is reflected by the sudden appearance of the shaft.

300,000 cubic meters of air, 300 tons of work done by 0.3g (opposite to natural gravity) in 0.2 seconds, in the form of a shock wave to the ground with a radius of 20 meters, and then the shock wave scraped off a layer of sand and gravel particles on the ground, and then this shock wave carrying a large amount of sand and gravel particles expanded into a prototype range with a radius of 150 meters. In this circular area, the dust on the ground that has not yet dissipated appears as a radiating line from the center to the periphery.

In terms of energy, it is actually not stronger than the destructive power of a boulder smashed past, but from the perspective of effective destruction, most of the energy after each boulder hits the ground is acting on the ground, just like the shelling of World War I, a large amount of energy is smashed on the ground outside the trench, and shrapnel consumes kinetic energy in the air. If a thermobaric bomb goes down, the energy acts on the air and can shock a soldier on a street into internal injuries.

Human beings live in air, not in stone. The energy of the trebuchet is to smash a hole into the ground, and the energy is used to smash the ground, and the shockwave effect is to polish the ground. Gives all targets in the air a tearing force that is nothing for solid metal stone, but obviously lethal to flesh and blood.

With Lu Jiuzhong's success this time, Lu An walked to the sand and gravel test site and checked the results of the destruction. All rats in cages in the caves on the ground were exterminated. There are no scars on the outside, but there is blood from the nose and mouth. transcribing the data,

At this time, Lu Jiuzhong flew to the sea six hundred meters away and continued to try. He seemed to have discovered a fresh game. (A game of paper film.) Although Lu Jiuzhong didn't say anything, judging from his performance, he was very interested in this new thing. Although his operation was still very rusty, he often only created chaotic air currents nine times out of ten, and did not make a sound. But his interest led him to continue experimenting on the beach.

He repeatedly debugged the video of his success recorded by the holographic glasses, and carefully recalled his just right operation when he succeeded. If the people of the Xuanniao Department saw this scene, they would definitely be surprised that Lu Jiuzhong and Lu An were so compatible.

In the Xuanniao Department, one department after another was afraid that Lu Jiuzhong might get bored, and they were very conservative when designing the way to use the super. It's like a doctor who treats the emperor, because he can't take responsibility, so when he prescribes medicine, he tries to be as decent as possible, and he doesn't dare to take drastic medicine.

In fact, the glasses that Lu An made for Lu Jiu to remake that could detect the direction of vortex currents in the air were not very powerful technology. Just to show the situation when the air is forced, it can be developed by changing to other super departments. Lu Jiu is important to do the current scene is mostly to rely on himself to contact, and the reason why no one developed it for Lu Jiuzhong before is because all the scientific researchers consider that after making this thing, if Lu Jiu tries it a few times and says: "This thing is useless to me", it is equivalent to doing useless work.

The premise that researchers are interested in research has become a setting in the eyes of many people that "if scientists don't do research, they will panic". However, the reality is that scientists are also ordinary people, and if they do not have enough money and fame, they will not invest their limited energy in research directions that will not be rewarded.

No one wants to do unused work, just like most people don't want to do their homework when they are children. Only when adults know that doing homework is useful and force children to do it, will they do it. Of course, when you grow up, if you have children, you will definitely force the next generation to do it.

However, no one can force Lu Jiuzhong, and now this kind of super energy operation method of "using the atmospheric pressure of 1,000 pascals as the bow body, using the 300 tons of compressible air covered by the super energy as the bowstring, pulling the bow apart with gravitational super energy, and then creating an inward focused shock wave," is not difficult to say, easy to say, just like ordinary people learn to ride a bicycle and learn to swim, they always have to fall a few times and choke a few mouthfuls of water to succeed.

However, because of this setback, no one in the Xuanniao Department dared to design this plan for Lu Jiuzhong, and all the researchers focused on the topic of "how to make the influence of gravity superenergy on gravity higher". They didn't know how Lu Jiuzhong's superpowers were in terms of how they felt about it. And with Lu Jiuzhong's own knowledge, he can't complete the more detailed use design of his superpower. Of course, if Lu Jiuzhong hadn't been plotted by the gunsmoke once and had been a vegetative person for a year, Lu Jiuzhong would not be so active and proficient in this kind of operation that was several times more difficult than his previous stone-throwing operation.

The camera pulls back to the surface of the sea

A muffled sound of "collapse" exploded on the sea surface, and the sea surface stirred up a circle of white water waves under the effect of the shock wave. The surrounding birds that were predating in the waves collectively pulled up the angle and fled towards the surroundings. In the middle of the waves, a high-speed jet rises from the surface of the sea (Zhao Mingyi's gravitational control has just acted on the seawater, creating a low-pressure cavitation in the seawater)

Lu Jiu looked at the waves on the sea again, looked at his hand again, and said secretly in his heart: "If the proficiency increases every time you can create a high-speed shock wave, then the attack efficiency is many times higher than before." Thinking of this, Lu Jiuzhong took off the holographic glasses full of science and technology, without the prompt of the glasses projection, Lu Jiuzhong raised his hand, and tried again, "poof" is like a fart, this is a very rapid air flow formed on the sea surface, and the entire air flow formed a small tornado.

This air current sucks the splash of the waves up more than ten meters into the sky, forming a rainbow under the sunlight. But there was no explosion. It was a failure.

Obviously, Lu Jiuzhong's proficiency is not high enough. Without the prompting of the lines and numbers of the glasses lenses, Lu Jiuzhong could not operate successfully.

Just as Lu Jiuzhong was about to put on his glasses again and continue practicing, he suddenly raised his head and looked at the sea in the distance, where a steamer with the symbol of the tiger was sailing through the waves. Feeling that there was something on the ship that made him uncomfortable, Lu Jiuzhong frowned, and couldn't help muttering to himself at the sea: "What is on the ship?" ”