A sphere of diameter D and density ps falls at a steady rate through a liquid...

 

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A sphere of diameter D and density ps falls at a steady rate through a liquid of density p and viscosity u. If the Reynolds number, Re = pDU/u, is less than 1, show that the viscosity can %3! be determined from u = gD2(os - p/18 U. A sphere of diameter D and density ps falls at a steady rate through a liquid of density p and viscosity u. If the Reynolds number, Re = pDU/u, is less than 1, show that the viscosity can %3! be determined from u = gD2(os - p/18 U.