An oil drop falls through air with a terminal velocity of `(5xx10^(-4))/(sec)` viscosity of air is `1.8xx10^(-5)(N-s)/(m^(2))` a

An oil drop falls through air with a terminal velocity of `(5xx10^(-4))/(sec)` viscosity of air is `1.8xx10^(-5)(N-s)/(m^(2))` and density of oil is 900 kg `m^(3)` neglect density of air as compared to that of oil.
A. `2.5 xx 10^(-5) m`
B. `2 xx 10^(-4)`
C. `3 xx 10^(-6)m`
D. `4 xx 10^(-4)m`

An oil drop falls through air with a terminal velocity of `(5xx10^(-4))/(sec)` viscosity of air is `1.8xx10^(-5)(N-s)/(m^(2))` and density of oil is 9

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