# Ball bearing glycerol experiment. EXPERIMENT TO DETERMINE THE VISCOSITY OF GLYCERINE. 2019-01-12

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## An Investigation into the terminal velocity of steel ball bearings in Glycerol. The human reaction time coupled with the accuracy of the basic stop watched used could see a variation of almost ±0. Do this before the lesson. Analysis A has a sphere ball that falls down along a tube containing the sample liquid to be measured, and this tube is surrounded concentrically by a tubular jacket for thermal control. So, if we count the average speed as the terminal velocity, we can show the following relationship. It is the ratio of mass to volume, and is a measure of how much matter is packed into a space.

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## Experiment to find the terminal velocity of a ball travelling in glycerol Essay Collect a selection of liquids of differing viscosity and put each of them in turn into a pipette. The graph shows that there is an inverse relationship between the time taken and the diameter of the steel ball. Record your calculation in a second data table, like Table 3. If you have specific questions about your science fair project or science fair, our team of volunteer scientists can help. . From my calculations, the unknown mass is 0.

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## The Science Experiment Which Took Off Like A Rocket On another note, what were the units of the viscosities you calculated. Remember, the average speed is equal to the distance traveled, divided by the time it took to travel that distance. But we should also have subtracted off a buoyancy force, which would get this closer to 4. From these results I concluded that the ball bearings of radius 3. If your liquids got dirty or contaminated somehow during the experiment, you will need to dispose of them properly. This means the cylinder must be sufficiently long enough for this to occur. ChetI think the problem was with the length of my tube, and the heavier balls where not reaching terminal velocity.

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## schoolphysics ::Welcome:: Replace the water with liquids of different thicknesses, such as corn syrup or a mixture of glycerin and water, and repeat the experiment. The position from which the ball is dropped should be measured, and kept the same each repeat. If the ball diameter is on the same order as the cylinder diameter, the relationship you used will not be as accurate. Ask an adult for help cleaning up and disposing of the liquids if necessary. The results obtained were within the limits of experimental error. This is an internal property of the fluid that offers resistance to the movement of particles through it. The ball is also a constant variable in this experiment and this improves the accuracy of the collected results as it would not be affected by changes due to the use of different balls which could have slight changes in diameter and weight.

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## Stokes' Law, Reynolds Number, and Measuring Liquid Viscosity I am going to carry out an experiment to find the terminal velocity of steel ball bearings in glycerol. The vertical height, h, of the ramp should be no less than 7 cm. Think of a 1-inch cube of bread. These are typically based on one of three phenomena—a moving surface in contact with a fluid, an object moving through a fluid, and fluid flowing through a resistive component. Every fluid has a property called viscosity. Another cause of the outlier could be that from the previous test, the glycerol was not wiped off properly and so it affected the speed of the ball.

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## The Science Experiment Which Took Off Like A Rocket Experiments to compare the relative viscosities of different liquids involve timing the fall of an object through a cylinder of the liquid. Since the ball bearing must leave the table horizontally, make sure that the horizontal part of the ramp is level with the surface of the table. Introduction In this piece of coursework, The subject of terminal velocity is going to be discussed, and a terminal velocity experiment will be performed. We can determine this smoothness by calculating Reynolds number: where Re is Reynolds number, is the fluid density, V is the characteristic velocity, d is the characteristic flow length, and is the fluid viscosity. As the marble passes the starting point, which was marked in the previous section, the person holding the stopwatch should start the stopwatch.

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## Viscosity Science Experiments Vertically, in the above illustration, the projectile's initial velocity equaled zero, since it was launched straight forward. Despite this, the experiment should be valued for inspiring thoughts about how we can take advantage of the different conditions of outer space now space travel is possible. This solution would also help reduce the effect the wall boundaries have on the viscosity, as I have shown using the Ladenburg corrections — these have quite a significant effect. Viscosity seams an ideal area to look into, and with the experimental data I have it seems possible to work out a value for its coefficient. The length of the tube was only 20cm.

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## Viscosity Science Experiments There was a human element involved in the measuring of the velocity that decreased accuracy and precision. This is where I am getting most confused. This table shows the Reynolds No for each different radius of sphere. However, as the experiment is being carried out over two weeks, I shall monitor the temperature closely. Procedure a Set up the measuring cylinder or tall glass tube, filled with the viscous liquid, so that it is illuminated from above by a bright source. I am going to carry out an experiment to find the terminal velocity of steel ball bearings in glycerol.

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