Air and hydrogen have nearly the same elastic properties, but the density of hydrogen is less than that of air. Sound travels faster (about 4 times as fast) in hydrogen than in air. Although the density of air is much less than that of iron, the elasticity of iron is very much ...
NASA and Russia later used a modified Tu-144 as a flying laboratory for studying supersonic flight [source: NASA]. The Suborbital Shuffle The Dream Chaser under development in February 2011 Bill Ingalls/NASA via Getty Images The problem with fast flying is that disturbances can propagate ...
and we've also seen that we can use the Doppler effect of 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...
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 form a shock wave. ...
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 waves do not propagate in front of the aircraft, but rather create a wave — similar to the ...
What Is Hypersonic Speed? 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 ...
The Supersonic Future: 500 routes flown twice as fast Explore the travel possibilities aboard Overture, across more than 500 supersonically-viable routes. Sep 8, 2020 In Boom Supersonic by Boom Supersonic How exactly do you “break” the sound barrier? Is the sound barrier an invisible wall...
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Many of today's designs wouldn't look out of place in the 1960s. Though packed with vastly improved technology, the new Boeing 737 MAX is similar in appearance to the 737-700 of 50 years ago. Getty Images We live in an era of fast technological change: self-driving cars, drones, arti...
The fast-acting fuse ignites first, propelling the shell into the air, and then the time- delay fuse ignites to cause the aerial shell to explode when it is high in the sky. If the timing of the fuses is not just right, the shell can explode too close to the ground, injuring people...