Unit Imaginary Number. The unit Imaginary Number (the equivalent of 1 for Real Numbers) is â(â1) (the square root of minus one). In mathematics we use i (for imaginary) but in electronics they use j (because i already means current, and the next letter after i is j). Examples of Imaginary Numbers i
8 Things You Must Do When Your Flight Is Cancelled Or Delayed. 1  Fly in the morning. You can almost stop reading here, this one is so key. 2  Avoid regional jets flying out of hub airports. Hub airports depriorize small regional planes because bumping them affects fewer passengers and costs airlines less money than rerouting an AirBus.
During the past six years, millions of passengers have been on at least 65,000 U.S. airline flights that shouldn't have taken off because planes weren't properly maintained, a six-month USA TODAY investigation has found. FAA FINES TELL TALE: Number, total show extent of problem.