I move this section from the
rpm page:
- The theory of relativity sets limits to rotational speed for an object of a certain diameter. When the rotational speed or diameter increases, a point on the perimeter will move faster, but cannot move faster than the speed of light. If the rotational center is made to move faster, the rotating object will deform so that the perimeter moves at its allowed speed. This effect can be noted on computer hard disks.
The last sentence: "This effect can be noted on computer hard disks" must be wrong. If a hard disk is rotating with 10000 rpm, then the diameter of the disk need to be several hundred kilometer for the velocity of the perimeter to approach the speed of light. Or am I wrong? --css
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