ERIC Number: EJ723659
Record Type: Journal
Publication Date: 2004-Nov
Reference Count: N/A
Forces and Holes in Liquid Surfaces and Soap Films: A Simple Measurement of a Not-So-Simple Effect
Gratton, Luigi M.; Oss, Stefano
Physics Education, v39 n6 p509-513 Nov 2004
In this article we show how to verify that in a fluid surface or film the value of the surface tension (i.e. the free energy per unit area) does not depend on the area of the film itself. The experimental evidence discussed can be obtained extremely simply yet with great accuracy. This experiment is important in that it leads to a deeper understanding of the actual microscopic nature of the fluid state of matter and to its comparison with the solid state, as well as to a practical example of a differential (zero) measurement procedure.
Descriptors: Foreign Countries, Physics, Science Education, Science Experiments, Mechanics (Physics), Energy
Institute of Physics Publishing, Dirac House, Temple Back, Bristol, BS1 6BE, United Kingdom. E-mail: firstname.lastname@example.org; Web site: http://journals.iop.org.
Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Authoring Institution: N/A
Identifiers - Location: Italy