I don't know, you tell me!
No, the speed of the hard drive depends on the rpms the hard drive runs at. RAM has nothing to do with it.
no
The capacity of the hard drive has no bearing on performance. The rotational speed of the drive, as well as the size of it's cache, however, do often have a noticeable impact.
For Raid 5 all the hard drives have to be of the same speed.
It is likely to depend on the speed of the external hard drive, although most newer external hard drives have a reasonable speed, so it is likely you will be fine wi th using an external hard drive.
Only as fast as its CPU. Doesn't matter the size of the hard drive - the hard drive does not determine processor speed.
capacity type and speed of the hard drive
A larger hard drive will increase the overall speed and performance of your computer.
Well it can vary between high speed SATA or high speed IDE hard drives. They all link into a port on the side or middle of a motherboard. an IDE hard drive is a hard drive with a long rectangular outlet or hookup to the motherboard. A SATA hard drive is a small but reliable plug to the motherboard about half an inch long.
That is entirely dependent upon the speed of the hard drive, if the other hard drive has a higher RPM, or read/write time, then yes it will.
Cleaning your hard drive will speed up the speed of it, and make your computer read information better. Cleaning can help your computer as a whole not just one part.
The RPM of your hard drive. A 7000RPM drive is faster than a 5000RPM drive, and an SSD is faster than all Platter hard drives.