Hello, i'm jae-dong, a dreamer。
What's a rainbow
What's a rainbow? "water flows down" is almost universal physical law. As the figure shows, can the water from the a cup go up to the b cup? The answer is yes, the catheters in the picture, which we call the rainbow straw, are actually following a certain physical pattern behind a phenomenon that seems to run counter to natural common sense。
Use of rainbow straws: insert one end into the a cup sink, suck hard on the other and release the water into the b cup when it reaches the b port at its highest point。
Here is a story that the novelist himself experienced: the village's family, when they were small, made “gap powder”, and one of the processes was the water washing the broken melon, which had to be released after the water had been used, using the iris principle. However, the time taken to open his mouth was not well-managed, the early release of the rainbow would fail and the delayed release of the water would flow into his mouth. Anyway, that water is really bad。
Why the rainbow
With regard to the interpretation of the principle of iris, there were different views, and how did everyone think about it
Liquid height difference theory: the essence of iris is generated by liquid pressure and atmospheric pressure。
Discussion:
Because h1
Old gh2 = p2, so the pressure at the left end of a is greater than the pressure at the right end of a, and the water moves in one direction under a combination of atmospheric and liquid pressure。
Special reminders:
(1) this is not a kind of connector, the concept of which is an instrument to connect at the upper and lower levels
(2) there is a liquid pressure, and there is also an atmospheric pressure, and if there is no atmospheric pressure, only a liquid pressure, then the water in the tube is bound by point a, with a left flow, a right flow, and a vacuum layer in the middle。
This theory comes from encyclopedia, and, of course, i do not approve of this interpretation。
Gravity connector theory
Discussion:
Theories of iris are conceived from iris, i. E. The physics-teached connectivity, i. E. I. E. I. E. I. E. I., i. E. I., i. E., i. E., i., i. E., i., i. E., i., i. E., i., i., i. E., i., i., i., i. E., i., i., i., i., i., i. E., i., i., i., i., i., i., i. E., i., i., i., i., i., i., i., i., i., i., i., i., i., i., i., i., i., i., i., i., i., i., i., i., i., i., i., i., i., i., i., i., i., i。
This theory comes from the dog-searching encyclopedia, and, of course, i do not agree with that interpretation, but i cannot go on with the example of the bricks that were sent, and today we focus on my point。
If there is anything wrong, let's get it right:
Pressure is the measure, i. E., as mass, a quantity without direction, such as temperature, air density, etc., which corresponds to "vectors", i. E., the amount of direction, such as speed, power, etc. Thus, there is no suggestion that the upper left side of the rainbow straw is the pressure that is strong on the right side, but we can analyse it with a high difference。
Analysis:
We have a maximum pressure of p0, which is less than the pressure of the atmosphere, and which is related to the flow speed of the pipe. Considering the persistence of quality, i. E., the quality of water flowing from the a and the flow from the b ends, it is possible to assume, without taking into account compression (and without taking into account compression), that the amount of water flowing in any cross-section unit time in the tube is equal, so that we do not have to consider the speed item in the bernouli equation. In the above scenario, a pressure p1 = p0-+1, b pressure p2 = p0-+2 because h1
P2, allowing water to flow within the rainbow straw. Note:
If p0
Life is full of science, and the simple thing is that an experiment with rainbows is enough a hose to be used as a small family experiment to expand children's horizons。
I'm jae-dong, a man with dreams。
