Mizukawa brought two cartons of milk and threw one of them out. Then glue the empty box under the full box and forcefully pierce the bottom of the full box. Then, let the upper and lower boxes be connected. At this point, suck the milk through a straw. The question is whether the direction in which the milk flows above or below?

Liuzifeng looked at the milk carton: If you don't suck the milk with a straw, then the milk must go down. The reason is simple, the water flows lower.

When there is as much milk below as there is milk above, the atmospheric pressure up and down is the same. Therefore, there is no pressure difference. So, you can't drink milk anymore. However, this is also easy to solve. Just gently shake the milk carton on top and the pressure balance will be broken. With the pressure difference, you can continue to drink milk.

When the box on it is empty, you can remove it. If you don't want to drink the rest of the milk, use a straw to blow into it constantly. Until the gas is full, the gas in your mouth is expelled. At this point, turn the milk carton upside down. Don't worry about the milk coming out. Because the gas floats upwards and the atmospheric pressure on the milk carton is small. So, both of these will cause the milk in the carton to move upward.

But Dueñas said, "No! There is air in the empty box, and none of it can be vented. Therefore, the atmospheric pressure in the empty box is always stronger than the atmospheric pressure in the human mouth. The huge pressure difference causes the milk to only flow into the person's mouth, not into the box below. Unless a small hole is made in the box underneath to create a weak pressure difference between the outside and the empty box. Otherwise, the milk from above will never flow to the bottom. If you really want the milk to flow into the empty cartons, simply gently shake the box underneath.

Mizukawa looked at them: if there was an infinite minus one empty box, then what would happen?

Margarita said: "It's like dominoes, there will be a chain reaction." Of course, when it comes to infinity, there are many variables. Any small variable can turn into a huge outcome.

It doesn't make sense for you to say that! If the amount of air in each empty box is different, what do you think will happen to the top milk? I can't imagine that I could get into a kind of entanglement. And this entanglement, like quantum entanglement. At this time, the milk may be in a variety of different states at the same time, making it difficult to distinguish between them.

Mizukawa said again: If there is lotus root flour in the box, can the lotus root flour be sucked up? We all know it's impossible. Why? Because milk is fluid, it is fluid. But I want to verify it.

So Mizukawa took lotus root flour and put it in a box, and he actually sucked lotus root flour. He turned pale in an instant, and it turned out that he didn't need liquidity. Any object can be sucked up, it's just different.

Mizukawa looked at the sky: Do you say that there is the same amount of air everywhere? Isn't there a pressure difference in nature? If so, how is it that the upward movement of the object is not seen? Or is it that the lower the height, the lower the pressure? I thought about it, it seems so. But that's not right. Doesn't it say that the higher the altitude, the thinner the air? In that case, why isn't there any upward movement?

Both the milk carton and the person's mouth are confined spaces, not open. Although there is very little air in the sky, it is often replenished from below. In this way, I want to be white.

Life is endless, exploration is endless. On this path of physics, you and I continue to move forward.