Computer Parts!!

Motherboard
There is something called a thermal compound which prevents the CPU from getting hot>Also the fan which comes attached to certain kinds of CPU. If nothing was there to cool it then the CPU would break down.
Theres a battery installed in the motherboard which controls the BIOS. If this battery is removed all your settings will get erased and your computer will be back to its old settings.
CD-ROMS
-CD-ROM is a storage device
-The information on the CD is stored in little dots called pits. They follow binary 0-is no pit 1-is the actual pit
The CD's we use have three layers 1) its the writable part its very thin here u can put a label. 2) the middle layer which consists of all the pits there. This part is delicate. Lastly a layer of plasctic covers it here you shouldn't be touching. This is what covers the delicate layer.
A CD holds 700MG and a DVD holds 4.7GB.
Optical Storage: This is something which is used to store and read with the help of the laser.
You should be very careful with both the upper and lowest layer of the disc by not writing with pen which contains acid and damages your pits. If by anychance there is a scratch in your CD which will mean the laser in your CD player will to mistrack> there are two ways of recovery:
1) There are CD-cleaning fluids that are available which you can buy
2) Toothpaste can also be used which you rub it on the scratch from the centre to the outer portion.
Magnetic Part
A magnet has two poles as we know> north & south. The magnet is used like a switch on & off representing binary.
One magnet is one bit
A hard drive disk is a metallic magnetic disk with loads of magnetic receptors.
One thing to remember is that unlike CD's, HDD's use magnets not pits.
Incase you don't know BUT NEVER!! PUT MAGNETS NEAR YOUR HARDDRIVE-THEN SAY GOODBYE!! TO IT.
The other Parts of the Motherboard
Controller Card which consists of:
1) power input
2) IDE which attaches the HDD to the CD-ROM by a long wide cable
3) jump switch (something movable and creates a circiut)
A capacitor- an elctronic device that holds charge
A laser which located on the arm inside the CD-ROM. While the disc spins the laser slides back and forth to read information from the center of the drive.

By Ardavan.z