PIRA 2A20.20 - Surface
Photo Shows the Apparatus Used at U.T. Austin
Instructions / Notes:
Start by rotating the circular handle to lift the labjack such that the surface tension ring is fully submerged in the water. Record the force measured by the dynamometer.
Slowly lower the labjack until you see a lamella form (a raised portion if the water that hugs up against the tension ring - pictured below).
Once the lamella breaks, measure the force.
- Display the strength of surface tension.
- Determine the amount of energy contained in the lamella.
Close up of the lamella. It appears as a bubble just below the ring.
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