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It has been suggested that rotating cylinders about 13.5 mi long and 4.23 mi in diameter be placed in space and used as colonies. What

It has been suggested that rotating cylinders about 13.5 mi long and 4.23 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall acceleration on Earth?

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