A Spherical ball of radius 1mum and dens...

A Spherical ball of radius `1mum` and density `10.5g/sec` is dropped in spherical of visctivity `9.8` pouse and density `1.5g/c`.Wicrous force on the ball when it attains constant velocity is `3696times10^(-10)N`.The value of `x` is (Given, `g=9.8m/s^(2)` ) and `pi=22/7)

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