for calculating the viscosity how to get density of steel ball,liquid,acceleration due to gravity and velocity in same units.
density of liquid(caster oil)= 0.961 gm/cm cube
density of ball(steel)=7.9gm/cm cube
length of tube=100cm
velocity=9.99
r=0.221
formula for viscosity=2 rsquare(difference of density of liq and ball)acc due to gravity/9*velocity