13.A) Why airplane windows used to be rectangular. B) Why windows in the home are rectangular. C) Why the windows on airplanes are round. D) Why windows can cause airplanes to crash. 14.A) When two commercial airplanes crashed within months. B) When the speed of commercial airplanes gr...
Human flight has become a tired fact of modern life. At any given moment, roughly 5,000 airplanes crisscross the skies above the United States alone, amounting to an estimated 64 million commercial and private takeoffs every year [source: NATCA]. Consider the rest of the world's flight act...
Human flight has become a tired fact of modern life. At any given moment, roughly 5,000 airplanes crisscross the skies above the United States alone, amounting to an estimated 64 million commercial and private takeoffs every year [source: NATCA]. Consider the rest of the world's flight act...
Human flight has become a tired fact of modern life. At any given moment, roughly 5,000 airplanes crisscross the skies above the United States alone, amounting to an estimated 64 million commercial and private takeoffs every year [source: NATCA]. Consider the rest of the world's flight act...
Actually, the word and concept aren't new. Neal Stephenson made up the term in his 1991 science-fiction book Snow Crash,in which people use avatars(分身)to explore an online world. A number of small metaverses have since developed, where people can do many real life things—like working ...
In addition to those activities, airports must also provide the resources necessary to care for a fleet of commercial aircraft. Airlines need space for airplanes, facilities for routine maintenance, jet fuel and places for passengers and flight crews while on the ground. Air-freight companies need...
Before 9/11 many of the fear of flying classes visited or took place on actual commercial airplanes. However, with increased post-911 security, it's more difficult to organize these types of practical field-trips. With this, psychologists have come up with a new form of exposure therapy. Yo...
Despite the fears that many people have about flying, airplanes are one of the safest ways to travel. Constant improvements in airplane design and the way pilots are trained make flying safer every year. It’s okay to be a little nervous, but arming yourself with knowledge can keep you from...
"Airplanes are mystical — albeit commonplace — machines. Theymake strange noisesand provide unique sensations. They're complex. And they operate in a system with few parallels to what people know and understand," says Franke. So comfort yourself by learning how planes are designed to withstand...
Most commercial airplanes fly at 30,000 feet, which is 5.7 miles, so imagine $100 bills reaching thirty times higher than the clouds and you'll be getting somewhere close to $275bn. And now imagine what sum of money could make these mega-billionaires look like paupers. Yes, today, we ...