Excuse me. Could you keep the noise down please? I'm trying to do an important talk. Builder: Well yeah alright mate but I've got to get this fixed, you know what I mean? Scientist: Sounds are of ...

When planes exceed Mach 1 (the speed of sound, or about 767 miles per hour—1,234 kilometers/hour for those using the metric ...

A person fires a starting pistol. A distant observer stood 200 metres away (measured using a 20 m tape measure or trundle wheel) records the time between seeing the flash of light from the ...

"supersonic speed is the speed of an object that is faster than the speed of sound, measured at about 768 miles per hour at sea level." Aircraft speed is measured by a Mach number, which is ...

During the demonstration flight on January 28, 2025, the XB-1 broke the sound barrier three times, but not one of those ...

High above a barren California desert on Tuesday, a privately developed aircraft broke the sound barrier for the first time when Boom Supersonic's XB-1 demonstrator reached Mach 1.122.