As described in the previous articles, the day of the stones is the teaching of physics by secondary school students. All light bulbs, generators, electric light bulbs, sliders can be made on their own。
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The theme of the current period is another magical point of knowledge — iris。
In the show, the chiba team went out looking for tungsten. In the course of the ore, thousands and marguma were trapped in deep wells. I can't help it. The rescue was carried out using a pipe under the direction of krom. The physical knowledge involved in this section is the principle of “wine-blowing”。
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Explanation of the rationale
The so-called "wine sucking" can be described as the continuous flow of liquids into lower positions through the rainbow straw after they are filled with a penetrating tube structure, with an open end in a container filled with liquids。
The rationale for iris is mainly based on “atmospheric pressure”. As shown below, the liquid column in the left tube is longer and the right side is shorter. An analysis of the top point of the tube shows that the pressure on the left side is smaller than on the right side, so the water moves to the left, and then flows from the right side。
On the surface, the liquid is indeed “crawl first and land later”, but on the whole it is found that the liquid surface of the right cup is higher than that of the other tube, so that the liquid as a whole is downstreamed and its gravity decreases and does not run counter to the logic of “water flows down”。
Life applications
There are many examples of work using rainbows in life, and here are three amazing examples:
1. Water exchangers for fish tanks
The airbag is used to pump water from one side of the fish tank to the highest point, and no external force is required, and the water from the fish tank is automatically pumped out。
2. Rainbow-sucking toilets
Rainbow-sniffing toilets are also used in the same way. As illustrated, the toilet sewer is an external rainbow straw. Under normal circumstances, a part of the water remains at the bottom of the sewer, blocking the rise in the smell of the sewer. When the toilet is flushed, the liquid surface on one side of the toilet reaches the other side above the upper point of the rainbow straw, at which point the toilet produces a significant “sorture” and removes objects such as poop from the toilet due to the difference in height on both sides。
Three, a glass of justice
The magic of a glass of justice is that it pours a small amount of water into it, and it can be used normally, but as long as the liquid surface is above a certain height, the water in the cup flows out of the bottom and almost emptys it。
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In fact, the justice cup is similar to the toilet, except that the “wine straw” of the justice cup is embedded, and the latter is external。
Do it yourself. Make a simple glass
The glass that killed the pig in the ultimate challenge is the same thing as the toilet
