Code Number: 2A10.28
Demo Title: Surface Tension - Lotus Effect
Condition: Good
Principle: Surface Tension
Area of Study: Fluids
Equipment:
Maze toy with mercury drop, PIRA and Halloween templates, food coloring, water.
Procedure:
The object of the toy is to guide the mercury drop through the maze to the space in the center.
NOTE: Do not open or break the toy in such a way as to release the mercury.
The templates are coated with a hydrophobic layer the will allow you to fill the letters and objects with colored water to a high level.
References:
- Peppino Sapia, "Inflating/Deflating Drops", TPT, Vol. 62, #8, Nov. 2024, p. 701.
- Said Shakerin, "Lotus Effect Toy", TPT, Vol. 49, # 6, Sept. 2011, p. 346.
- F. Behroozi, "Determination of Contact Angle From the Maximum Height of Enlarged Drops on Solid Surfaces", AJP, Vol. 80, # 4, April 2012, p. 284.
- Herb Strongin, “Investigating Red Drop - Green Drop“, Science on a Shoestring, p. 2.