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Q. A solid copper ballwith a diameter of 3m at sea level is placed on the bottom of the ocean, at a depth of 10 km. If the density of sea water is 1030kg/m^3,how much does the diameter of the ball decrease when it reaches bottom?

Q. A rotating cylinder about 25.00 km long and 9.00 km in diameter is designed to be used as a space colony. with what angular speed must it rotate so that the residents on it will experience the same acceleration due to gravity as on earth? In radians per second.

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