An iron ball of radius 0.3 cm falls through a column of oil of density 0.94 gcm ^(-3) .It is found to attain a terminal velocity of 0.5 cm s ^(-1) . Determine the viscosity of the oil. Given that the density of iron is 7.8 gcm^(-3)

An iron ball of radius 0.3 cm falls through a column of oil of density

1.	An iron ball of radius 0.3 cm falls through a column of oil of density 0.94 gcm ^(-3) .It is found to attain a terminal velocity of 0.5 cm s ^(-1) . Determine the viscosity of the oil. Given that the density of iron is 7.8 gcm^(-3)
Answer» SOLUTION :` ETA = 2a^(2)(rho - sigma )g//9v = 2xx ( 10 ^(-2) ) ^(2) xx (0 - 1.47 xx 10 )^(3)xx 9.8 //9 xx (-0.21 xx 10 ^(-2)) ~~ 152 .44 NS m^(-2)`