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. 2  Avoid regional jets flying out of hub airports. 3  Before booking, check a routeâs on-time performance.  Donât check bags.
Contrary to what the screaming voice in the back of your mind told you during your last delayed flight, airline service in the U.S. is actually improving. In 2016, 7 percent fewer flights arrived late, fewer bags were lost per passenger, and the number of canceled flights dropped 21 percent â all despite last summer's major technical glitches at Delta and Southwest Airlines.