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Why erect eggs on the equinox? What is the principle of erecting an egg

Why does the vernal equinox erect an egg? What's the principle of erecting an egg? The vernal equinox is a day with the same length of day and night in the northern and southern hemispheres. The earth's axis tilted 66.5 degrees is in a state of relative balance with the earth's orbit around the sun, which is conducive to erecting an egg.

On the Equinox Day every year, thousands of people around the world are doing the experiment of erecting eggs. It is still difficult to find out why this "Chinese custom" has become a world game. But it's easy and fun to play: choose a smooth, well proportioned, fresh egg that has just been born for four or five days, and gently stand it up on the table. Although there are many losers, there are also many winners.

In fact, standing egg has nothing to do with the vernal equinox. Whether an egg can stand up depends on the gravity of the earth and the conditions of the egg itself. The impact of the vernal equinox on the gravity of the earth is negligible, and the yolk composition plays a great role in standing an egg. The sinking of the yolk will reduce the center of gravity of the egg. In addition, the egg shell itself is uneven. As long as three salient points are found, the egg can stand up after balance.

However, why can oval eggs be erected? In fact, although the eggshell is curved, the part where it contacts with the desktop is not a point. The curvature of the big end of the eggshell is relatively small, so that for a very small area, it is similar to a plane, and this minimal plane is enough as a supporting point to make the egg stand stably. And someone once did a similar experiment, put an egg standing up on the carbon paper, and then observed the contact surface between the egg and the carbon paper. It was found that the tips of at least three protruding points on the eggshell surface were stained with the color of the carbon paper, which is also the so-called 'tripod theory' of scientists.

In fact, eggs can stand up any day of the year, experts say. And the public can try it at home: take a fresh egg, make it big head down, gently put it on the table, carefully find the balance point, and don't let go until it doesn't fall. And standing eggs in the absence of external interference, can keep more than ten days.

According to Shi Lixue, a folklore expert, "erecting eggs on equinox" has a history of 4000 years in China, and the inheritance of folklore culture needs more people's participation.

On the Equinox Day, you might as well try erecting an egg, choose a smooth and symmetrical egg, and put it on the table to see if it can stand up, or compare with your friends who have more eggs to add some fun to life. Why not?

It's easy and interesting to play 'vertical egg': choose a smooth and well proportioned fresh egg that has just been born for four or five days, and gently erect it on the table. Although there are many losers, there are also many winners. Spring is divided into the best time of the egg game, so there is a saying that when the equinox comes, the eggs are pretty. The egg that stands up is not beautiful.

Why are eggs easy to stand up on the equinox? Although there are many arguments, the scientific truth is not long. First of all, the equinox is a day with the same length of day and night in the northern and southern hemispheres. The 66-50 tilt of the earth's axis and the earth's orbit around the sun are in a state of relative balance, which is conducive to the erection of eggs.

Secondly, the vernal equinox is in the middle of spring. It's neither hot nor cold. It's red and green. It's easy to set up an egg.

What's more, the surface of the egg is uneven, with many protruding hills. The height of the 'mountain' is about 0.03 mm, and the distance between the 'peaks' is between 0.5 mm and 0.8 mm. According to the principle that three points form a triangle and determine a plane, as long as we find three 'Hills' and the triangle formed by the three' Hills', and make the center of gravity of the egg pass through the triangle, then the egg can stand up. In addition, it is better to choose the egg after 4-5 days, because the yolk band of the egg is loose, the yolk sinks and the egg is heavy The drop of 100% is beneficial to the erection of eggs.

The smooth curve of the egg is the reason why it is difficult to stand up, and it is also the charm of the egg. Leonardo da Vinci, a famous Renaissance painter in Europe, once spent more than two years in painting egg curves, which laid a solid foundation for his later success in shaping Mona Lisa's mysterious smile.

The face is called "face" by Chinese people, and the shape of the face is taken as the standard of beauty, which fully shows the Chinese people's superb aesthetic appreciation level and the aesthetic attribute of the shape of the egg.

However, in a long period of time, people have been unable to find the mathematical expression of the egg curve, even mathematicians can only rely on the ruler and compass to approximate the egg curve. No wonder artists as like as two peas of twenty thousand eggs have said that no two are exactly alike. Until modern times, mathematicians found the mathematical equation of egg curve, and finally solved the puzzle of egg curve drawing which puzzled generations.

Today, egg shaped cars, airships, bridges, tunnels, gymnasiums, concert halls and other buildings can be seen all over the world. They perfectly combine science and culture, science and art, science and aesthetics.

Perhaps the popularity of these egg shaped objects and buildings is the inspiration given by the folk custom of erecting eggs in ancient China.