Current is measured in Amperes (usually just referred to as âAmpsâ). An ampere is defined as 6.241*10 18 electrons (1 Coulomb) per second passing through a point in a circuit. Amps are represented in equations by the letter âIâ.
The X-1, piloted by Chuck Yeager, was the first manned airplane to exceed the speed of sound in level flight and was the first of the X-planes, a series of American experimental rocket planes (and non-rocket planes) designated for testing of new technologies and often kept secret.
Fastest plane in the world. NASA's X-43 is the fastest aircraft in the world. On 16 November 2004, the X-43 reached Mach 9.6 (7,000 mph or 11,265 km/h) according to NASA. The X-43 is an unmanned aircraft, which launches not from the ground but from a B-52 at about 40,000 feet (12.2 kilometers) in the air.