The porosity of intermediate packing factor is given by ______

Civil Engineering : Soil Mechanics - Quiz(MCQ)

n = (1-cosÎ±)*( âˆš(1+2cosÎ±) )

n = 1-[Ï€/(6*(1-cosÎ±)*(âˆš(1-2cosÎ±))]

n = 6*(1-cosÎ±)*(âˆš(1-2cosÎ±))

n = 1-[1/(6*(1-cosÎ±)*( âˆš(1-2cosÎ±) )]

Correct Answer : n = 1-[Ï€/(6*(1-cosÎ±)*(âˆš(1-2cosÎ±))]

Explanation : The formula was given by Slichter. In an intermediate packing, the centres of any 8 spheres, originally arranged in a cubic packing form the corners of the rhombohedron, with an acute face angle α.

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