Well, there are some airplanes these days that have plugs for use so people can power their electronics.
No. Even if a laptop has internet, it does not work while flying on an airplane, because there is no Wi-Fi on an airplane, or in the sky.
yes you may
The only authorized means of using a laptop for airplane travel is to disable the wireless transmitter (done through your operating system or a button/toggle switch on the laptop itself).
sleep or get a laptop.
Well on AirFrance you can take a hp laptop. I don't know about others.
jet
Yes, you will need to take the laptop out of your carry on when you go through security.
Every laptop has a different power rating.
Polaroid PDV-0700 Portable DVD Player is a cheap laptop you can purchase to watch DVDs on an airplane. You can read its review at shira.net/tech-portabledvd.htm.
There are some power adapters that are designed for use on airplanes, but they are expensive and only offer a short addition to battery life.
An airplane is a VEHICLE. It's power is provided by a MOTOR.
power