Recently, some foreign netizens discovered that water did not float out of the cup during space lectures on the Chinese space station , and suspected that this was not taken in the space station environment.
The reason for foreign netizens is: objects should be weightless in space . However, when teaching in space on the Chinese Space Station, the water is still the same as on the ground. It is stable in the water cup and does not float out. Some foreign netizens even spread it. Conspiracy theories, doubting whether China has not launched a space station at all, and " Tiangong " is just a "prop" filmed on the ground.
Foreign netizens’ bold questioning of the Chinese space station is equivalent to saying that the earth is not round but flat.
It can be seen from the video that when the astronauts carefully poured water into the container, due to the effect of surface tension , the water would not float, and the ping pong balls in the water would not float, but would sit quietly. The container is in a state of equilibrium. But when the astronaut 'pressed down' the ping pong ball with a straw, the buoyancy of the water disappeared and the ping pong ball did not float to the surface. This unreasonable phenomenon could not happen on the ground.
If this experiment was done on the ground as foreign netizens questioned, then I have to say that China must have created a new level of human technology, anti-gravity device ? Even anti-gravity and anti-buoyancy devices? That would be even more astonishing, but all of this is the "aversion" of foreign netizens.
Under normal circumstances, liquid in space will form a ball because of the absence of gravity and the existence of surface tension. Surface tension is essentially a kind of van der Waals force. The mutual attraction between molecules acts on the surface of water. The spherical shape will be the lowest. potential energy state. In fact, the most important thing is why the water in the water glass is in the same state as on the earth, instead of being spherical?
It is not difficult to explain. This mainly depends on the infiltration ability of the liquid into the solid surface. Different liquids have different infiltration abilities into different solid surfaces. The larger the angle is, the smaller the wettability is. The smaller it is, the greater its infiltration ability.
Since water wets the glass, the contact surface between the water and the glass will be "adsorbed" together, so that the fixed glass containing water will look the same as on the earth. If the water is replaced by mercury , It may indeed become a ball, rather than adsorbed in the vessel.
Astronauts on the International Space Station once did a coffee cup experiment. The demonstration process included shots of some aqueous solutions rushing out of the cup and then spontaneously retracting. If you want to question it, isn't this experiment more affected by 'gravity'? It's amazing, because after pushing the coffee out of the cup, it can actually 'fall' back into the cup by itself.
All of these are actually liquids, especially the tension experiment of water at work.
This is also the core knowledge of this lecture: without gravity, buoyancy will disappear!
How terrifying are the doubts from foreign netizens?
According to the doubts of foreign netizens, if the Tiangong Space Station is faked, then mankind will directly enter the era of free shuttle in the universe!
Because all objects in the lens are to be weightless , including the astronaut’s hair, then this is equivalent to creating an anti-gravity laboratory, which is incredible!
Moreover, this laboratory needs to be able to accommodate 3 people. The shooting space alone is about an anti-gravity area of more than 20 square meters. At the same time, it can ensure normal air and temperature conditions, and synchronize sound transmission with the outside world in real time.
Or, you have developed a material with a density that is mysterious under normal air conditions (because astronauts are still breathing). This material can be made into table tennis balls, cups, and can also be in a liquid state. Only in this way can It will float again and half float in the liquid. It will float in the air without the liquid spilling out.
One is the anti-gravity and anti-buoyancy area, and the other is the mysterious anti-gravity and anti-buoyancy material. Good guy, this is not a question. This directly pushes China's technology to the top of the next century and directly enters the era of universal space travel. , if this is the case, I would be even more excited.
It's just that the scientific truth is that foreign netizens are jealous, that's all. If their doubts are to be taken seriously, then the title of the next article may become: "Shocking! Under the ancient city wall of Hengdian Film and Television City , actually hides China’s anti-gravity laboratory.” It’s getting more and more dreamy.
In fact, instead of believing that "there is an anti-gravity laboratory underground in Hengdian", I still believe in the innocence and sheer unwillingness of foreign netizens to think.
For example, as long as you make a little change, the power of cognition will change dramatically:
Finally, let me show you a set of data.
According to a 1999 Gallup poll, 6% of the people in the United States did not believe that the United States had ever landed on the moon. By 2013, another survey said that this proportion had reached 37%.
Americans question the book about the moon landing
Today, the birth of the Chinese space station is like a dream to many "cute" foreign netizens, as if it appeared out of thin air. To them, China's speed is not just Questioning, but simply not understanding.
The photo on the left is from Earth, and the photo on the right is from China's Tiangong Space Station (TSS). The water in the cup is obviously tilted. This tilt becomes more pronounced when you lower an object into water in a weightless environment.
We want to thank the nine-year compulsory education. There are still a majority of people in the world who have failed physics or have never studied physics. When we look at modern Western technology, we need to learn from and catch up with it, but we must also understand that the West also has a lot of weird things. There are not a few netizens who fail just by relying on their knowledge of daily life experience and intriguing IQ.
I personally have a feeling that foreign netizens are increasingly unable to understand our technology, which just proves that our technology is advancing by leaps and bounds. I feel happy when faces the "sourness" of foreign netizens!
