What is the solution Results

PROCEDURE - Fill the three tubes with the liquids under test to a level of just below the exit from the capillary tube as shown in Figure 1. - Use three balls of different diameters with each liquid; measure diameters of the balls. Nominal size of balls supplied: 1.59mm,2.38mm, and 3.175mm. - Choose any two distance points in the tube to count the time of the fall of the ball. The distance points can be chosen as 2200,2000,1750 or other, making it convenient to count the time for each liquid (strictly the chosen points must be same for all the test liquids and tubes). - Allow the ball to fall through the capillary tube into the test liquid (in between two chosen points) and simultaneously count the time by using a stop watch. - Using the universal hydrometer, obtain the specific gravity of each liquid. - Record all the data and Final calculations in Table 1. NOTE: - Since glycerol absorbs moisture easily from the atmosphere, a small amount of cotton wool should be placed in the top of the capillary tube if the tube is left full for any length of time. - With the engine oil, since it is considerably less viscous than either castor oil or glycerol only, the 1.59mm ball can be used. With a larger size ball the time to fall 75 mm is too short. If a smaller size ball is used it cannot be seen falling through the oil. Further, because the time is so short, the accuracy must be suspect. RESULTS - Barometric pressure: ___ mmHg - Temperature: C - Measured diameter of balls (2r):1.590mm_,2.380mm_,3.175mm - Specific gravity of steel (s):7.8