Sound waves travel at approximately 750 mph at sea level, but slow down at higher altitudes. The speed of sound is called "Mach 1." Supersonic refers to speeds from Mach 1 to Mach 5 (1 to 5 times ...

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 ...

As an airplane flies faster than the speed of sound, it "pushes" on the sound waves in front of it. But sound waves obey the speed limit—they can't travel faster than the speed of sound.

As the aircraft flew in front of the sun, NASA’s team documented the changing air speeds as speeds over Mach 1, the speed of ...

Although sound travels quite fast, it is still possible to measure its speed in air. To do this, you need to measure the time it takes a sound to travel a measured distance. To reduce errors ...

Boom Supersonic, the company aiming to create commercial planes that can travel faster than the speed of sound, have ...

Venus Aerospace has completed the inaugural test flight of a drone fitted with its "rotating detonation rocket engine" (RDRE) — accelerating it to just under the speed of sound. The company ...

Pilots have been exploiting the augmented jet stream to coast across the Atlantic Ocean at speeds of up to 840 mph — which is faster than the speed of sound, the outlet reported. The planes didn ...