fluids

Measuring the Surface Tension of Water using the Pendant Drop Method

Student Manual

This experiment involves a simple method to determine the surface tension of a liquid, which in our case is water, by analyzing a drop formed at the edge of a tube containing the liquid. This technique is called the Pendant Drop Method since the liquid drop assumes a pendant shape under the influence of gravity. In this experiment, we will learn what surface tension is, its implications and how the dimensions of the pendant drop allow us to estimate its value. What is fascinating in this experiment is that the shape and form of the drop can provide quantitative insight about an important physical property.

Experiment Code1.20
VersionJune 25, 2018 V1

Further Readings and References


Pictorial Procedure

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Dynamics of Water Discharge from a Cylinder

Student Manual

This experiment demonstrates the dynamics of water owing out of a tank. Using the rate change of mass for an emptying cylinder, we investigate the application of Bernoulli’s equation and the resulting Torricelli’s theorem. We also observe the effects of constriction on the parcel of water owing out of the tank. Students will investigate fluid dynamics, pressure and will relish how a phenomena as simple as water owing out from a tank can lead to rich dynamics that can be explored mathematically.

Software CodeDownload
Sample ResultsLinear relationship between the square of velocity and height
Experiment Code1.18
Version13 April 2016

Further Readings and References

  • Physics for Scientists and Engineers with modern Physics , Raymond A. Serway, John W. Jewett, Jr. 465-483 , (2010).

Pictorial Procedure

By Azeem Iqbal | Lab 1
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