Some analysts believe the technology could reach Mach 15-24, but air travel at hypersonic speeds means overcoming forces unlike those faced by even the fastest supersonic craft. In short, we have a long way to go before we can commute from New York to Los Angeles in 12 minutes [sources:...
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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...
Rocket-powered and shrouded in secrecy, X-planes helped pave the way for the US space programme: Now they have another mission – taking the boom out of supersonic travel.以火箭为动力,高度保密的X系列飞行器为美国太空计划铺平了道路,现在,它们有了另外一项任务:实现超音速旅行 In 1947, the first ...
Therefore, the sound of the echo will have a higher pitch than the original sound you sent. If you measure the pitch of the echo, you can determine how fast the car is going. Sonic Boom While we're here on the topic of sound and motion, we can also understand sonic booms. Say the...
What does a flight test engineer do? A flight test engineer is responsible for the planning, execution and reporting of a flight test event through a close collaborative process with the test pilots. Depending on whether they work with the military, government or private industry, they can spend...
How far away can a sonic boom be heard? The intensity of a sonic boom can vary depending on several factors, including the size and shape of an aircraft, exactly how fast it is moving and whether it makes turns along its trajectory. But the altitude of the aircraft is key, sin...
Deadly Nadders are extremely fast both on land and in the air. Astrid's dragon, Stormfly, rivaled even Toothless in speed. Astrid discovered that, when put on a diet of chicken, the Nadder's speed increases greatly, but it is implied to only be temporarily and Stormfly isn't still ...
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 wake of a boat — that follows along with the aircraft. A sonic boom is that sound wave passing by the observer...
How fast can the high-speed bullet trains in China travel? A. 60% faster than typical aircraft. B. Over 400 kilometers per hour. C. Less than 1, 000 kilometers per hour. D. 1.4 times the speed of sound.Which word is similar to the underlined word "propel" in the last paragraph...