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Try this Physics Central feature to see an activity that illustrates the Raleigh-Taylor instability--the creation of ripples at the surface between two fluids with the higher-density fluid on top. The ripples become growing fingers, and the fluids mix. You can do this activity with easily obtainable materials, chilled tap water and hot, dyed tap water.
Subjects Levels Resource Types
- General
- Statics of Fluids
- High School
- Instructional Material
= Activity
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Additional Information
Physics To Go This resource was a Physics To Go feature from March 1, 2007 until March 16, 2007. View the feature here!

Access Rights: Free access
Restriction: Has a copyright or other licensing restriction.
Keywords: density, fluids, surface tension
Record Creators: Metadata instance created June 2, 2006 by Ed Lee
American Physical Society
Record Updated: Apr 26, 2009 by Lyle Barbato
Last Update
when Cataloged:
January 5, 2001
ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
, WWW Document, (
My Cup Runneth Down, <>.
APA Format
My Cup Runneth Down. (2001, January 5). Retrieved May 29, 2024, from
Chicago Format
American Physical Society, and American Physical Society. My Cup Runneth Down. January 5, 2001. (accessed 29 May 2024).
MLA Format
My Cup Runneth Down. 5 Jan. 2001. American Physical Society, and American Physical Society. 29 May 2024 <>.
BibTeX Export Format
@misc{ Title = {My Cup Runneth Down}, Volume = {2024}, Number = {29 May 2024}, Month = {January 5, 2001}, Year = {} }
Refer Export Format

%T My Cup Runneth Down %D January 5, 2001 %U %O text/html

EndNote Export Format

%0 Electronic Source %D January 5, 2001 %T My Cup Runneth Down %V 2024 %N 29 May 2024 %8 January 5, 2001 %9 text/html %U

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Citation Source Information

The AIP Style presented is based on information from the AIP Style Manual.

The APA Style presented is based on information from APA Electronic References.

The Chicago Style presented is based on information from Examples of Chicago-Style Documentation.

The MLA Style presented is based on information from the MLA FAQ.

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