It will "use" as much as you can give it. For a desktop installation, you will need at least 128 MB of RAM.
P.S. Ubuntu 5.10 is long obsolete. There is absolutely no reason to use it other than historical curiosity.
Yes, if it has high enough specs (fast enough proccessor, ram etc...) For small screens like that, you should use Ubuntu Netbook Remix
to much
Use a calculator, comes standard on Windows. 252x2=504 pretty much 252+252
The RAM that is used for a laptop is not the same as the RAM that you would use in a desktop PC. The RAM that is used for a PC is much too big to be used in a laptop, so a laptop has to use a much smaller RAM card which is called SD-RAM.
Ubuntu 11.04 has not yet implemented the Gnome 3 interface, but the next version of Ubuntu, 11.10, will use Gnome 3.
4GB of RAM
You can use the Ubuntu operating system as you would use any other operating system! Unlike MS Windows, which is propriety and has to be paid for, Ubuntu is a free, open-source operating system that can be downloaded for free, and copied and given away as much as you like! I recommend searching Google for more info.
Regular ubuntu font family.
3 GB of ram can use for core 2 duo
The microprocessor determines how much RAM your computer can use
512 to 1gb ram are recommended
Ubuntu uses the Linux kernel, which is a monolithic kernel with loadable modules.