In studying sand transport by ocean waves, A. Shields in 1936 postulated that the bottom shear stress τ required to move particles depends upon gravity g, particle size d and density ρp, and water density ρ and viscosity μ. Express this relationship in dimensionless form using the first principle (dimensional analysis).

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In studying sand transport by ocean waves, A. Shields in 1936 postulated that the bottom shear stress τ required to move particles depends upon gravity g, particle size d and density ρp, and water density ρ and viscosity μ. Express this relationship in dimensionless form using the first principle (dimensional analysis).

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