The size of a computer monitor has no bearing on the performance capabilities of the machine.
Most Mac monitors run on 1080p.
About the size of a moderaly sized apple. Perhaps 2-3 inches in diameter.
The size of an average apple is about the size of an adult Male's fist.
The size of an apple seed, or pip, can vary, but on average, it is about 1/4 to 1/2 inch long. It is typically brown and oval-shaped.
It is an All-In-One computer made by Apple. The computer and monitor are one piece.
The resizing button changes the size of the screen that is seen on the computer monitor. It can be adjusted to any size with the maximum size being the size of the monitor.
19 inches is the largest size car monitor that you can buy.
Apple has quite a few monitor stands to choose from at it's store. http://store.apple.com/us/question/answers/product/TY173LL/A?pqid=QKJCJJ79TXC2JYTFK9H7CAYTXJJ9T9C2K
apple size
Most desktops come with a built in screen (all in one piece) but if you get a Mac Mini, which doesn't have a built in screen, you can use any monitor, it doesn't have to be Apple.
It would depend on the particular unit, the monitor and their connection options; but generally yes they can usually be combined - sometimes requiring an adapter to connect one to the other.