I'm not sure what the most recent method is, but most computers use heat sinks and cooling fans to keep them cool however there are other methods such as liquid cooling, complete submersion in mineral oil, and even liquid nitrogen cooling. Extreme methods, such as liquid nitrogen, are usually used when overclocking a computer.
The fan, usually. Some models don't have one, but if they don't have one, they won't need one.
electric fun
Motherboard connects every component of a computer and so its AKA "backbone of PC"
A component located inside the computer chassis / case.
a very complex arena
Tucker
define "cool"
A good enough video card, high RAM, processors, and from time to time a case that keeps it cool with good ventilation etc...
The CPU
pc,cables,hub,
Sell the PC to a junk dealer and buy new PC
hard drive
They're COOL things That Do Cool Stuff.
On my 1997 maxima I had to replace it and found it in the air intake to the fan. this was under the dash. Its on a PC board and the air passing overit keeps it cool. Bob.