the echo to determine how fast something is going. It is therefore possible to create a "sound radar," and that is exactly what sonar is.Submarinesand boats use sonar all the time. You could use the same principles with sound in the air, but sound in the air has a couple of problems...
Hypersonic speed is five times the speed of sound. Scientists measure speeds this fast with a Mach number, named for Austrian physicist Ernst Mach. Sound has a speed of Mach 1 and anything Mach 5 or above is considered hypersonic. While the speed of sound changes depending on temperature and...
NASA engineer Laura O'Connor inspects a supersonic ramjet (scramjet) engine model at Langley Research Center in Hampton, Virginia. © Corbis Key Takeaways A ramjet is a type of air-breathing jet engine that operates on the principle of compressing incoming air without the need for rotating...
This lack of friction and the trains' aerodynamic designs allow these trains to reach unprecedented ground transportation speeds of more than 310 mph (500 kph), or twice as fast as Amtrak's fastest commuter train [source: Boslaugh]. In comparison, a Boeing-777 commercial airplane used for ...
The Bell X-1 rocket plane was the first plane in recorded history to break the sound barrier. What causes a sonic boom? Pressure waves, aka sound waves, propagate at the speed of sound. When an aircraft is moving faster than the speed of sound (breaking the sound barrier), the pressure...
How fast does a supersonic aircraft fly compared with the speed of sound? Supersonic Aircraft: Supersonic aircraft is an aircraft that has the ability to fly faster than the speed of sound. Some example of a supersonic aircraft are Douglas F4D Skyray , and the Lockheed Martin F...
Sound is the energy things produce when they vibrate (move back and forth quickly).If you bang a drum, you make the tight skin vibrate at very high speed (it's so fast that you can't usually see it), forcing the air all around it to vibrate as well. As the air moves, it ...
How fast must a truck travel to stay beneath an airplane that is moving 139km/hr at an angle of 25 to the ground?Components of a velocityVelocity is the ratio of displacement and time interval to cover the displacement. In 2-Dimensional motion,...
In fact, we are in Namibia, a roughly Texas-sized country at the southwest corner of the African continent. Walvis Bay is one of the Atlantic’s great natural harbors, but it’s surrounded by emptiness: 31,000 square miles of desert. The dunes march right into the sea, setting up an ...
from the aircraft at the speed of sound, which is about 1,200km/h(750mph). If the plane accelerates to the speed of sound or faster, then the sound waves can no longer move fast enough to get out of the way of the aircraft. The waves bunch up and combine to...