In a high glass vessel poured oil (density of 0.9 x 10 3 kg / m ^ 3). Directly above the oil hold a lead ball of 1.5 mm, which was then released without shock. Ball Density 11.3 x 10 3 kg / m ^ 3. At the end of its movement the ball speed becomes equal to 14.6 cm / s. Find viscosity of the oil.
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