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Spherical dust particles of $50 \mu \mathrm{m}$ are settling under gravity in air at $21^{\circ} \mathrm{C}$ and normal atmospheric pressure. Density of particles is $1250 \mathrm{~kg} \mathrm{~m}^{-3}$ and density of air is $1.2 \mathrm{~kg} \mathrm{~m}^{-3}$. Considering viscosity of air as $1.81 \times 10^{-5}$ Pa s, the settling velocity of dust in $\mathrm{mm} \mathrm{s}^{-1}$ will be________________


Question ID - 156776 | Toppr Answer

Spherical dust particles of $50 \mu \mathrm{m}$ are settling under gravity in air at $21^{\circ} \mathrm{C}$ and normal atmospheric pressure. Density of particles is $1250 \mathrm{~kg} \mathrm{~m}^{-3}$ and density of air is $1.2 \mathrm{~kg} \mathrm{~m}^{-3}$. Considering viscosity of air as $1.81 \times 10^{-5}$ Pa s, the settling velocity of dust in $\mathrm{mm} \mathrm{s}^{-1}$ will be________________

1 Answer - 5876 Votes

3537

Answer Key : (94 to 94) -

94 to 94



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