Application of compressed air (first, second, third)

ç’§ ç’§ ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( The bigger the pressure, the smaller the pressure. Pressing air into the container becomes compressed air. Compressed air is a "powerhouse" and it has many applications.

In the ball, the tire is filled with compressed air. The more gas is filled, the harder the ball is, and the more the tire is. Of course, the air can't be filled too much, otherwise the "Hercules" will break through the "bubble beer in the beer can be sprayed out of the pipe, which is also the credit of compressed air. In the steel cylinder with beer, use the pump to score The air, so much air crowded in a small place, the air molecules are certainly not reconciled, they have collided outwards, so there is a lot of pressure, so that the beer is sprayed out of the pipe.

George of the United States created the first compressed air brake in the summer of 1866 based on the fact that compressed air can generate a lot of force. It was called "The Seven Fairies" in October 1868.

When the magic glass is empty, nothing can be seen. When you sip the wine, the cup immediately shows a vivid figure of the fairy. The following is the correct reason for the formation of the fairy figure: compressed air can also build a house. In the frame-shaped trachea, there is sufficient compressed air. It is not possible to "blow" out the structure of a house. Then, a layer of film is placed on the frame to form a house. A small house that can accommodate two people, with a normal pump, can be "blowed" in three minutes, the entire building is about 70N heavy. It is also very convenient to "demolition" the house. Pull out the air, let go of the compressed air, fold the film, and take it away. In this way, it is also possible to "build" a large house of up to 500 m2, which is called a "framed inflatable building" and is a good home for field trips and mobile workers. There is also a large house that is blown out directly with a soft film material like a soap bubble. This kind of building is called “air-bearing inflatable building”, and the stadium built by gas-bearing construction method is as large as 3,500 m2, which can accommodate 80,000 spectators.

In the 1980s, the former Soviet Union had appeared "inflatable furniture." This kind of furniture is a balloon with a diameter of 40cm and a height of 80cm. It can be equipped with a sofa chair with 4 airbags, a table with 5 airbags, a sunshade with 7 airbags, and a special airbag with 78 airbags. The jacket can be assembled into an inflatable boat.

Inflatable parachutes are now very popular, and shortly before it floats in the air, scientists have begun to develop a "soft-winged flying frame", which is an inflatable aircraft. Scientists envision filling compressed air into the "wings" of a plane made of a soft material. It is certainly light and convenient to fly with this light and hard wing. Hovercrafts and air bearings that have appeared in recent years are also practical applications of compressed air.

(A) may be the liquid level reflection of the wine, appearing in the wine (b) may be the image magnified at the focus of the cup bottom convex lens. Yun Deng Tie may be a chemically developed picture of the wine. It may be that the focal length of the convex lens of the cup is increased after the alcohol is used, so that the picture is enlarged within a focal length. (02 Huanggang) Analysis According to the analysis, there is a sandwich at the bottom of the cup, a small picture is embedded in the bottom of the sandwich, and the bottom of the cup above the small picture is made into a convex lens. After the wine is applied, the liquid forms a concave lens that has a diverging effect on the light. The liquid concave lens and the cup bottom convex lens work together for the light, which is equivalent to making the focal length of the cup bottom convex lens larger, so that the picture becomes a magnified virtual image within a focal length of the convex lens, and the fairy figure can be seen. I chose (D).

Ningbo Beilun Huari Metal Products Co., Ltd. is a manufacturer (ISO 9001:2008) of high pressure aluminum and Zinc Die Casting, located in Beilun Ningbo, China.

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