question_answer

A liquid of density \[\rho =1000kg/{{m}^{3}}\]and coefficient of viscosity \[\eta =0.1Ns/{{m}^{2}}\]is flowing down in vertical pipe of large cross section. A small ball of density \[{{\rho }_{0}}=100kg/{{m}^{3}}\]and \[r=5cm\]will be at rest in flowing liquid, if velocity of flowing liquid is 10 k m/s. Then find the value of k.

Answer:

5.00