1. 12 steps to determine viscosity

2. Step No. 1 Select the spherical object and liquid for this measurement.

3. Step No. 2 Calculate the density of the sphere. The formula for density is d=m/v, so you will need to determine the sphere's mass and volume in turn.Measure mass by placing the sphere on a balance. Determine the volume of the sphere. Volume of a sphere is calculated by using the formula V= (4/3) x Π x r x r, where V=volume and r=the radius of the sphere. You can find the radius by measuring around the sphere to get its diameter and then dividing the diameter by 2 to get the radius.

4. Step No. 3 Calculate the density of the liquid you are measuring. The formula for determining density is d=m/v, where d=density, m=mass, and v=volume.Measure the mass of the liquid by first weighing the empty graduated cylinder. Pour your liquid into the graduated cylinder and then weigh it again. Subtract the mass of the empty cylinder from that of the cylinder with the liquid in it to obtain the mass of the liquid. To find volume of the liquid, simply determine the amount of liquid you poured into the graduated cylinder by using the scale on the side of the cylinder. Record the volume in millimeters (mm). Use the formula d=m/v and your measurements to find the density of the liquid.

5. Step No. 4 Fill the graduated cylinder with the liquid to be measured.

6. Step No.5 Make a mark at a fixed position near the bottom of the graduated cylinder, around 2.5 cm (1 inch) or 5 cm (2 inches) from the bottom.

7. Step No. 6 Make a mark at a fixed position at the top of the cylinder, somewhere below the top of the liquid, around 2.5 cm (1 inch) or 5 cm (2 inches) from the top of the liquid.

8. Step No. 7 Measure from the top mark to the bottom mark to get the distance between them, using the meter stick.

9. Step No. 8 Drop the ball into the liquid.

10. Step No. 9 When the bottom of the ball reaches the mark at the top of the cylinder, start the stop watch.

11. Step No. 10 When the ball reaches the mark you made at the bottom of the cylinder, stop the stop watch.

12. Step No. 11 Calculate the velocity of the sphere by using your measurements and the formula v=d/t, where v=velocity, d=distance, and t=time.

13. Step No. 12 Plug the information you have obtained into the formula for viscosity, viscosity=[(∆p)ga]/9v, where ∆p=the density of liquid subtracted from the density of the sphere, g=the acceleration of gravity ( a fixed value of 9.8 m/s.s), a=the radius of the sphere, and v=velocity.