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A Ping-Pong ball with mass 6 g is attached by a thread to the bottom of a beaker. When the beaker is filled with water so that the ball is totally submerged, the tension in the thread is 0.031 N . Determine the diameter of the ball. The density of water is 1000 kg/m^3 and the acceleration of gravity is 9.81 m/s^2 Answer in units of cm

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