In the Viscosity experiment, a steel spherical ball of radius 1.55 mm is dropped into the liquid column, and the velocity is measured as 6.3 cm/s. Calculate the Viscosity of the liquid ?. Density of the steel ball-7.83 g/cm Density of the liquid-0.88 g/cm /2 3. During the experiment of a rotational motion using the equipment given as in the figure, a mass of 90g is dropped from a height of 50cm. The mass drops with a velocity of 14 cm/s to the ground. The platter's mass is 990g with a radius of 12.5 cm, while the smart pulley has 2cm. Verify this experiment obeys the principle of conservation of mechanical energy ?. If not, give the possibility of energy losses in this experiment. Spindle platter Pulley Smart Pu Hanging Mass