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.
Basically, the cheaper the airline, the more delays and cancellations youâll experience. Hereâs a list of airlines with the most delays: 1  Delta Airlines (28.5% of flights cancelled or delayed) 2  Alaska Airlines (32.7% of flights cancelled or delayed)  United Air lines (35.3% of flights cancelled or delayed)