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.
Gen. Charles Yeager straps into an F-15D for a re-enactment flight commemorating his breaking of the sound barrier 65 years ago on Sunday. NELLIS AIR FORCE BASE, Nev. (AP) â Sixty-five years after becoming the first human to fly faster than the speed of sound, retired Air Force Brig.