When the plane crossed the sky, at a certain moment, I suddenly heard a loud noise in the air, like an explosion, and a mass of white material followed. This makes people wonder, how did this sound come from? What is white material?
Before answering questions, let's understand two concepts. When all objects, including sound, propagate in the air, they will be subjected to certain air resistance, and the faster the object moves, the greater the resistance. The speed of sound propagation in the air is about 340 meters per second. However, when the propagation speed of an object in the air is close to the speed of sound, the air resistance will increase sharply, which will cause the object to vibrate strongly and the speed will be attenuated. Therefore, this phenomenon that the speed of an object is close to the speed of sound, which leads to the obstruction of the growth of the object, is called the sound barrier.
However, when the speed of an object breaks through the sound barrier, the object will pierce the hard expansion force formed by high-pressure air, and the powerful shock wave will produce a huge sonic boom. This kind of sound is called sonic boom, which is mostly produced when the aircraft flies at supersonic speed. In this process, after the air around the plane is compressed by high pressure, the boiling point of water rises, and the water vapor in the air precipitates into liquid water, thus forming a fog-like sonic boom cloud, which is the white material mentioned at the beginning.
In fact, the phenomenon of sonic boom first appeared on the X 1 plane piloted by Americans in 1947, which was the first time that human beings broke through the sound barrier. At that time, he was flying at the speed of 1278 kilometers per hour, when suddenly there was a loud noise in the sky, accompanied by a cloud, and a hug appeared. However, in addition to the supersonic flight of aircraft, there are many things that can produce sonic booms.
The first is space jump. 201210/5, Austrian extreme athlete Felix baumgartner jumped from an altitude of 39,000 meters with the world's largest helium balloon, reaching an amazing speed of 1 173 meters per hour. There is also the Falcon heavy rocket, which is one of the most powerful rockets launched by Space X. It is 69.2 meters high and weighs 1.420 tons, which can provide 2,280 tons of takeoff thrust.
This powerful support can easily break through the speed of sound and send out a thunderous sonic boom. Although the emergence of hugs has witnessed the development of science and technology, its negative effects are also obvious. When the plane flies at low altitude and supersonic speed, people and animals on the ground will hear deafening sounds, which will seriously affect people's life, work and health.
According to the reaction of the Palestinian people, when Israeli air force fighters fly at low altitude and supersonic speed, they have a great influence on the Palestinian people, such as a large number of women having miscarriages, and huge vibration waves cause cracks in walls and broken windows. Therefore, as early as the 1970s, the United States federal air transport issued relevant regulations prohibiting supersonic flight over the United States. However, with the increase of aircraft altitude, this effect will gradually weaken, and countries also stipulate that supersonic flight is not allowed at the altitude of 654.38+100000 meters. This shows the great power that should be reported.