The hole in the CD is where the machine you put it in "grips" the CD so the disk can be spun and thus read and used.
15mm (1.5cm).
There is a small hole in the front of the drive, just small enough for a paper-clip wire. Straighten a paper clip and push it in the hole until the drive opens.
Some of them have a tiny pin-hole on the front, near the door. Stick a pin in this and it should release the door. Failing this you may have to open up your computer disconnect the drive, unscrew it from the casing, take the top off and the CD should be exposed underneath.
If the CD is a CD-R it is only "Writable," and cannot have songs added to it after its initial burn. If the CD is a CD-RW you should be able to "Rewrite" songs onto the CD and reburn them.
optical disls
tecnolgy
So they don't fall out of the CD player
The little circle in the middle, push it down and pull the CD out.
it is 5 .5 centermeters long exactly
The small hole at the center of a CD is called the "spindle hole" or "hub hole." This hole allows the CD to be securely attached to the spindle of a CD player or drive so that it can be properly read and played.
there is a little hole under the CD door, push something thin there and the door will open. Gently push the end of an opened (unbent) paper clip into the small hole on the front of the door. It doesn't take much pressure.
Optical drives have a little hole in the front. Typically a paper clip is un bent and stuck in this hole to manually open the drive.
No British coin is minted with a hole in the middle. You may have a privately minted coin, token or medallion. A little more detail would be helpful.
On the face of the cd player, look for a small hole. With the power off, insert a paperclip in the hole, turning the gears to push the cd out of the player.
most CD drives have a tiny hole near where the CD goes in, just stick something in the hole, like a paperclip or something. Push it into the hole and it will force the CD out. It might not have the hole, I think only computer style CD drives have it.
CD's have a diameter of 5.5 centimeters;)
No