Please try again later. Watch this video to properly learn how to rethread your Safety 1st Alpha Omega car seat harness. Also applies to the Cosco Alpha Omega, Safety 1st Alpha Omega All in One, Able 65, Aquos 65 and All in One Sport car seats.atch this video to properly learn how to rethread your Safety 1st Alpha Omega car seat harness.
Story highlights. 1  Chuck Yeager was the first test pilot to break the sound barrier. 2  In 1947, he flew past Mach 1 after being dropped from a B-29 bomber at 45,000 feet. 3  Yeager said he laid down a pretty good sonic boom over Edwards Air Force Base.
In dry air at 20 Â°C (68 Â°F), the sound barrier is reached when an object moves at a speed of 343 metres per second (about 767 mph, 1234 km/h or 1,125 ft/s). The term came into use in this sense during World War II, when a number of aircraft started to encounter the effects of compressibility, a number of unrelated aerodynamic effects that struck their aircraft, seemingly impeding further acceleration.