Fluid Dynamics

Q: the drag force acting on a sphercal droplet of radius 10¯⁵ m moving with a velocity of 1 cm/sec in a fluid of viscosity 5.31*10¯⁷ (SI unit) comes out to be

(a) :  10¯¹⁶ N
(b) :  10¯¹⁴ N
(c) :  10¯¹² N
(d) :  10¯¹⁰ N
(e) :  None of the Above
Answer:  10¯¹² N
Explanation:  

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