What do humans learn from eggs? What was invented?

People invented cupola and thin-shell roofed houses through eggshells.

Because the shape of the eggshell is oval, when the egg is pinched in the palm of the hand, the pressure on its surface is equal; This pressure is not enough to break the eggshell, so the eggshell does not break. Because the force is first absent or transitive, when pinched, it acts and transmits the force to the rest of the egg through the liquid in the egg. The egg shell is made of calcium carbonate, which has a certain degree of solidity, in fact, the stone is mainly composed of calcium carbonate.

An egg shell is a thin, uniform shell that is fully enclosed. When holding an egg, the grip force exerted on the eggshell around the egg evolves into a uniform distributed force through the adaptation of the eggshell, which is like applying uniform pressure to the whole surface of an object, and as a result, the object becomes more compact, and of course it is not easy to break. From the point of view of physical mechanics, this method of applying pressure in an all-round way, the increase of force can only make the object smaller, and eventually develop towards the Sun like Wu Zixing.

But if there is a small hole in the eggshell, even if it is very small and very regular, of course, it must be enough to destroy the closed structure of the eggshell, then the egg is easy to crush.

The internal structure of the eggshell of the boiled egg is destroyed, the calcium is decomposed and lost, the eggshell changes from liquid to solid, the tension of the liquid, the dispersion and absorption of force is stronger than that of the solid, and the membrane that wraps the egg white in the egg loses its effect when cooked, so it is easy to crush.

The inspiration from eggs was the invention of the thin shell structure.

The reason why a thin eggshell can withstand a lot of pressure is that it is able to evenly distribute the pressure to all parts of the eggshell. Based on this "thin-shell structure", the architect designed many buildings that were both light and economical. The Great Hall of the People, the Beijing Railway Station and many other famous buildings have this "thin shell structure" on the roof.

The thin shell structure is a thin-walled structure of the curved surface, which is divided into cylindrical shell, dome thin shell, hyperbolic flat shell and hyperbolic parabolic shell according to the form of curved surface generation, and the materials are mostly steel and concrete. The housing can make full use of the strength of the material, while at the same time combining the two functions of load-bearing and enclosure into one.

People invented the thin shell structure from the eggshell.

A person holds an egg and squeezes it vigorously, no matter how hard he pushes, he can't crush the egg. The reason why the thin eggshell can withstand so much pressure is that it is able to evenly distribute the pressure applied to all parts of the eggshell.

Based on this "thin-shell structure", the architect designed many buildings that were both light and economical. The Great Hall of the People, the Beijing Railway Station and many other famous buildings have this "thin shell structure" on the roof.

Summary. 3In October 1879, by chance, Edison tried to use carbonized cotton thread to put the bulb in, after the power was turned on, the bulb emitted a golden glow, illuminating the entire laboratory, after 13 months of hard work, tried more than 6,000 kinds of materials, tested more than 7,000 times, and finally made a breakthrough. 4 The lamp was left on for 45 hours before the filament was burned.

This is the first electric light with practical value in mankind. Later, October 21, 1879 was designated as the day of the invention of electric light, marking the birth of the usable electric light.

Edison invented the table lamp.

Leonardo da Vinci taught people to draw eggs.

British scientists David and Faraday invented the arc lamp. This type of electric lamp uses a charcoal rod as a filament. Although it can emit bright light, the light is dazzling, consumes a lot of power, and is very impractical.

Therefore, Edison secretly decided: "We must invent a kind of electric light with soft light, so that thousands of households can use it." 2 He began to work on the material of the filament:

From traditional carbon bars to metal ruthenium, chromium, platinum, etc., in this way, Edison experimented with more than 1,600 materials, but Edison did not retreat in the face of repeated failures, and he firmly believed that failure is the mother of success.

3In October 1879, by chance, Edison tried to use carbonized cotton thread to put the bulb in, after the power was turned on, the bulb emitted a golden glow, illuminating the entire laboratory, after 13 months of hard work, tried more than 6,000 kinds of materials, tested more than 7,000 times, and finally made a breakthrough. 4 The lamp was left on for 45 hours before the filament was burned. This is the first electric light with practical value in mankind.

Later, October 21, 1879 was designated as the day of the invention of electric light, marking the birth of the usable electric light.

But Edison was not satisfied, he wanted to prolong the life of the bulb, and then he tried to use the carbonized bamboo wire as the filament, the test results showed that the use of bamboo filament as a filament works very well, the filament is durable, and the bulb can be lit for 1200 hours. So the electric light began to be mass-produced, and after that, the electric light began to enter the homes of ordinary people.