I am not the master of my electronic items and believe me, I have many. I am lucky enough to have a son that went to college and works on computers for the state and also is an IT technician for another company part time on the side. He is also an MS Certified Engineer, which I think is just a typical computer guru with a fancy title. Whenever I have problems, I call him. When I was at the airlines, they gave all pilots their own Apple iPad. Of course, I had issues almost right away. I was sitting at the gate in Denver trying to process the weight of the luggage, freight, fuel and passengers and use the formula that we use to calculate our takeoff speed using the wind speed as part of the calculation. I couldn't get the right answer. I kept getting anywhere from 80 -400 for takeoff speed, which both numbers are absurd, so I called him and he guided me through it. We have an on-board system that figures it, but we are supposed to use the iPads as backups, so I was attempting to gain some knowledge by figuring it out on the iPad. I had numbers all over the place and none of them were right. Thank goodness for the on-board system.
Here is a little interesting fact. If you would take the engine off of a Boeing 767 and put it on a typical automobile, you could go from 0-60 m.p.h. in about a half of a second. That's only true if your car could hold to the road and not spin its wheels. I figured that out one day by just fooling around with the iPad.