more drag is created because the air molecules are not moving out of the way of the airplane
Sound velocity in steel - 5960 m/s Sound velocity in Stainless steel - 5760 m/s
As altitude increases (to about 35,000 ft) air density, pressure and temperature all drop. As density decreases speed of sound increases, but with drop in pressure it drops; these two practically cancel each other out. As temperature drops, speed of sound drops. Thus at 15,000 ft the speed of sound is slower than at 6,000 ft so plane X is flying faster than plane Y.
The speed of sound changes only with temperature. The altitude and the atmospheric pressure has no influence. Usually the temperature goes down with higher altitude. Notice: The speed of sound changes with temperature and a little bit with humidity − but not with air pressure (atmospheric pressure). The words "sound pressure at sea level" are incorrect and misleading. The temperature indication, however, is absolutely necessary. The speed of sound in air at 20 degrees Celsius (68 degrees Fahrenheit) is 343 metres per second. That is 1126.547 feet per second.
Brass players make sound by buzzing their lips into a mouthpiece attached to the instrument. The vibration of the lips creates sound waves that resonate through the instrument, producing a rich tone. By changing the tension and speed of their buzzing lips, players can produce different pitches and dynamics.
Sound is a change of energy status from one type to another , but of a physical nature. when a jet aeroplane flies fast enough to break the speed of sound it causes shock waves in the air by compression, and changes this into a sound wave / noise . so this is a physical change , not chemical.
If accelerating to the speed of sound, the subsonic.
We call them ultra sonic planes. There is a sonic boom it is traveling when this speed.
Because the speed of sound travels at +- 1300 km/h and the car that is approaching isn't that fast. So u first hear the sound before the car reaches u.
The Concorde was one such flight which can make out a mac no of 1..thereby defeating the speed of sound..
It was referred to as breaking the sound barrier.
The end of a whip, when cracked.
The sound moves through the air at 740 mph, regardless of the speed of the source. The sound ofthe siren passes you at 740 mph.However, since the source is approaching you, more waves pass you each second than leavethe source each second. That's why the pitch of the sound from an approaching source soundshigher than its actual pitch.Also ... since the sound doesn't move away from the source any faster than 740 mph no matterhow fast the source is moving, that's why the pressure of the sound waves piles up in front ofthe source when the speed of the source approaches 740 mph, forming what's popularly calledthe "sound barrier".
There was not a special name for the first flight that went faster than the speed of sound. However, when a plane does go faster than sound, it said to be traveling at supersonic speeds.
The speed of sound flying varies depending on the altitude, temperature, and humidity. On average, the speed of sound at cruising altitude ranges from approximately 660 to 720 miles per hour.
I honestly don't see anything in that list of choices that comes anywhere close to an adequate description.
The first flight at faster than the speed of sound occurred on 14 October 1947. The aircraft was the Bell X-1 and the pilot was Captain Charles Yeager.
The word you are looking for is "subsonic." This term describes speeds that are slower than the speed of sound.