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A spherical particle of calcium carbonate with a diameter of 100 m and of density 2800 kg. m-3 settles freely in water. Determine the

 

A spherical particle of calcium carbonate with a diameter of 100 m and of density 2800 kg. m-3 settles freely in water. Determine the time it takes for the particle to reach 90% of the terminal velocity. The density and viscosity of water may be taken as 1000 kg. m-3 and 0.001 N.s.m-2

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