[Wolfman77]

Inigma, I believe you are confusing force with acceleration. Not hard to do in this context. The "force" being refered to in this thread is similar to gravity, which is technicaly an acceleration, m/s^2. Force, as you are refering to, would be like Newtons, which is Kg*m/s^2. If you work the math out with their label on you will find that it makes more sense.

On that note however, if the ring were 1,000Km it would need the outside of the ring spinning at 2213m/s to achieve 9.7947m/s^2, approximately 1g. Also 1Km in from the surface would still have approximately 9.756m/s^2, less than 1/2 percent difference.

Don't ask me how you could get it to stay together at those speeds though.

I've also found out that about 4 inches (9cm) of water will block gamma rays, 3ft (1m) will block about 20% UV.