Many do not make sense about the story about sonic booms or explosions. Columbia Encyclopedia 5th edition (1993) says, "An object like an airplane, for example, produce sounds. When the sound of it reaches or exceeds the speed of sound, the object is caught up with the noise itself. "
On the other hand, many people believe there is something called "sound barrier" or the sound barrier, also that when the plane flew past him he issued a loud bang, as if he had hit an invisible glass wall. It is also wrong.
Everyone must tergiring to such thinking by the use of the term "obstacle" or barrier. This term was never meant to imply physical obstacles in the sky there, but only that the speed of sound to present obstacles to the development of faster aircraft lebh.
The definition of sound barrier is a barrier in aeronautics design context, not a physical obstacle. However, when the plane "bypass" the sound barrier, it is clear there are a number of physical stress experienced by the aircraft due to the shock wave (shockwave).
Real obstacle to supersonic flight posed by the speed of sound itself. (And of course supersonic means faster than the speed of sound, while the ultrasonic refers to the sound with higher frequencies than humans can hear.) In fact a lot of unique things happen when the object approached the speed of sound in air.
The plane flew through the air with a speed of several hundred km / hour. The speed is low enough this allows air molecules to stay relaxed when it should be brushed to give way; the situation is more or less like when someone is walking slowly lifted the crowd.
But when the speed of the aircraft to be proportional to the speed of the molecules, the molecules could not escape, they piled on the edges of the front of the plane and driven with him.
Rapid buildup of pressurized air is produced "air shocks" or shock waves, which form the explosion. The sound waves radiate in all directions and can be heard sebaga an explosion by the people down there.
What does all mentioned with the speed of sound? Well, the sound is nothing but a series of air compression and expansion.
If the air molecules around a certain speed, then there is a limit to how fast air can be compressed and dimuaikan, because molecules can not be compressed and dimuaikan faster than the motion of each against the other. That is why the speed of air molecules put limits on how fast sound can travel it.
The sound will propagate faster in warm weather ketimabng in cool air and the sound is also progress faster in dense high-pressure air.
That's why supersonic aircraft operate best at very high altitude cold areas, because they do not need to be going too fast to exceed the speed of sound. At an altitude of 9 km above sea level, the air cool and thin enough so that the sound speed is only 1100 km / hour.
On the other hand, many people believe there is something called "sound barrier" or the sound barrier, also that when the plane flew past him he issued a loud bang, as if he had hit an invisible glass wall. It is also wrong.
Everyone must tergiring to such thinking by the use of the term "obstacle" or barrier. This term was never meant to imply physical obstacles in the sky there, but only that the speed of sound to present obstacles to the development of faster aircraft lebh.
The definition of sound barrier is a barrier in aeronautics design context, not a physical obstacle. However, when the plane "bypass" the sound barrier, it is clear there are a number of physical stress experienced by the aircraft due to the shock wave (shockwave).
Real obstacle to supersonic flight posed by the speed of sound itself. (And of course supersonic means faster than the speed of sound, while the ultrasonic refers to the sound with higher frequencies than humans can hear.) In fact a lot of unique things happen when the object approached the speed of sound in air.
The plane flew through the air with a speed of several hundred km / hour. The speed is low enough this allows air molecules to stay relaxed when it should be brushed to give way; the situation is more or less like when someone is walking slowly lifted the crowd.
But when the speed of the aircraft to be proportional to the speed of the molecules, the molecules could not escape, they piled on the edges of the front of the plane and driven with him.
Rapid buildup of pressurized air is produced "air shocks" or shock waves, which form the explosion. The sound waves radiate in all directions and can be heard sebaga an explosion by the people down there.
What does all mentioned with the speed of sound? Well, the sound is nothing but a series of air compression and expansion.
If the air molecules around a certain speed, then there is a limit to how fast air can be compressed and dimuaikan, because molecules can not be compressed and dimuaikan faster than the motion of each against the other. That is why the speed of air molecules put limits on how fast sound can travel it.
The sound will propagate faster in warm weather ketimabng in cool air and the sound is also progress faster in dense high-pressure air.
That's why supersonic aircraft operate best at very high altitude cold areas, because they do not need to be going too fast to exceed the speed of sound. At an altitude of 9 km above sea level, the air cool and thin enough so that the sound speed is only 1100 km / hour.
What causes a sonic boom?
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