A centrifuge with rotational speed of 1440 rpm is used for separating oil from a dispersion in which oil is present in the form of spherical globules of $47 \mu \mathrm{m}$ diameter. The density of oil is $886 \mathrm{~kg} \mathrm{~m}^{-3}$. Separation occurs at an effective radius of 4 cm. Viscosity and density of water are $0.705 \mathrm{cP}$ and $1000 \mathrm{~kg} \mathrm{~m}^{-3},$ respectively. The velocity of oil through water, in $\mathrm{mm} \mathrm{s}^{-1}$ is_______________

A centrifuge with rotational speed of 1440 rpm is used for separating oil from a dispersion in which oil is present in the form of spherical globules of $47 \mu \mathrm{m}$ diameter. The density of oil is $886 \mathrm{~kg} \mathrm{~m}^{-3}$. Separation occurs at an effective radius of 4 cm. Viscosity and density of water are $0.705 \mathrm{cP}$ and $1000 \mathrm{~kg} \mathrm{~m}^{-3},$ respectively. The velocity of oil through water, in $\mathrm{mm} \mathrm{s}^{-1}$ is_______________

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