Dragon Boat Festival, as one of the important traditional folk festivals, has spread the patriotic stories and local games of poets since ancient times. The customs of this festival include eating zongzi, rowing dragon boats, inserting Pu Ai, wearing sachets, drinking realgar wine and taking water at noon. In the game, "laying eggs" and "floating needle" are the most popular.
The so-called "standing eggs" and "floating needles" mean that at noon on the day of the Dragon Boat Festival, eggs that are not easy to stand up on weekdays can stand upright on the ground at this time because of their extremely masculine height. Similarly, it can be proved that embroidery needles can also float on the water.
One said it was spring, and the other said it was Dragon Boat Festival.
In fact, if confirmed by scientific principles, it can be seen that because the sun shines in the northern hemisphere on the Dragon Boat Festival, the gravity of the sun and the gravity of the earth pull each other at noon, which makes it easy for eggs standing on the ground to stand up in balance. Therefore, laying eggs has become one of the best play items for children on the Dragon Boat Festival. [ 1]
Every spring equinox, tens of millions of people all over the world are doing "vertical egg" experiments. It's hard to prove why this toy, which is called "made in China", has become a "world game". However, the game is simple and interesting: choose a smooth and symmetrical fresh egg that has just been born for four or five days, gently stand it up and put it on the table. Although there are many losers, there are also many winners. The vernal equinox has become the best time for vertical egg games, so there is a saying that when the vernal equinox arrives, the eggs will be beautiful. The eggs that stand up are very beautiful.
Why do eggs stand easily at the vernal equinox? Although there are many sayings, there are many scientific reasons. First of all, the vernal equinox is a day with the same length of day and night in the northern and southern hemispheres. The inclination of the earth's axis is 66.5 degrees, which is in a relatively balanced state with the earth's orbital plane around the sun, which is beneficial to vertical eggs. Secondly, the vernal equinox is in the middle of spring, which is lukewarm, colorful, comfortable, quick-thinking, agile and easy to succeed in laying eggs. More importantly, the surface of the egg is uneven and there are many protruding "hills". The height of "mountain" is about 0.03mm, and the distance between peaks is 0.5-0.8mm. According to the principle that three points form a triangle and a plane is determined, as long as three "mountains" and the triangle formed by these three "mountains" are found and the center of gravity of the egg passes through this triangle, the egg can stand upright.
There is a saying in China that beginning of spring lays eggs. Beginning of spring, why do eggs stand up? Is there any principle in this? In addition, in some places, people also like to call the soul of frightened children by laying eggs. What happened?
Recently, the challenge of erecting brooms has exploded in the circle of friends, and many netizens tried to erect other things while the iron was hot. In fact, a broom can stand up every day, but it is not so easy for an egg to stand up without any external force.
Therefore, there is another folk saying about laying eggs, that is, it is easier to lay eggs on the vernal equinox. As for why there is such a statement, it is said that on the day of the vernal equinox, the sun shines directly on the equator, and the gravity of the earth will change accordingly. The gravity of raw eggs will change with the change of gravity, so it is easier for eggs to stand up at this time.
However, I don't know that the gravity of the earth on eggs is different at different times of the day, so there is no scientific basis for it to stand up more easily at the vernal equinox. In other words, whether an egg can stand has nothing to do with when it stands, but mainly depends on whether the person who stands the egg can find a good balance.
In some rural areas of our country, if children are always sick, feverish and listless, family members will blame this phenomenon on being scared. If the child is frightened, parents and elders at home also like to "call the soul" to the child by laying eggs.
The specific method is to draw a cross on the ground first, then stand the egg in the middle of the cross and gently call the child's name while standing the egg. At this time, we should also pay attention to the need to open the door at home. While calling the child's name, put an egg in the center of the cross. If the egg stands, it means success. The frightened soul of the child has been called back. Although this statement sounds superstitious, many rural areas still rely on this method.