An aluminum ball of radius R = 50 mm is suspended from the end of a homogeneous rod with mass m = 4.0 g on a thread. The rod is placed on the edge of a glass of water, achieving an equilibrium position in which half of the ball is immersed in water. Determine the ratio in which the length of the rod is divided by the fulcrum. Density of aluminum p1 = 2.7 • 103 kg/m3, density of water p2 = 1.0 • 103 kg/m3.
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