Demonstrations

Granular Segregation - Rising Stones

Code Number :	2C60.20
Disclaimer:	Reprinted by permission of Dick Berg, University of Maryland, for use on this website. The demonstrations contained and referenced herein are listed for the purposes of cataloging and describing physics demonstrations which should be conducted only under the direction of a trained instructional support professional or physicist. These demonstrations are not presented for the purpose of being conducted by persons unconnected to this Facility and/or persons not consulting with or being supervised by the recognized instructional support professional or physicist and his/her staff. The University is responsible only for those demonstrations carried out using its own equipment using established safety and scheduling policies, and bears no responsibility for those choosing to use this source material for their own purposes. All demonstrations described and contained herein are public domain, and can also be found in reference materials in libraries, bookstores, and electronic sources. Further information regarding legal liability in use of demonstrations and labs will be found on the web site Injuries in School/College Laboratories in USA. The University of Iowa Disclaimers: University of Iowa Disclaimer All Rights Reserved..
Condition :	Excellent
Principle :	Granular Mixing and Segregation
Area of Study :	Heat and Fluids
Equipment :	Centrifuge bottle with salt or fine sand, steel nut, plastic stick pins.
Procedure :	Lay one of the containers on its side. As you shake the container from side to side the nut will sink to the bottom and the light weight pin will come to the top. The upright container can be shaken in an up and down manner. The light pin will sink to the bottom and the steel nut will float to the top.

References

David Miller Raybin, "The Stones of Spring and Summer", TPT, Vol. 28, # 7, Oct. 1990, p. 500.

Rolf G. Winter, "On the Difference Between Fluids and Dried Beans," TPT, Vol. 28, # 2, p. 104, February 1990.

Robert B. Prigo, "Liquid Beans," TPT, Vol. 26, # 2, p. 101, February 1988.

Paul Hewitt, "Figuring Physics", TPT, Vol. 25, # 6, p. 398, Sept. 1987.

Paul B. Umbanhowar, Daniel I. Goldman, "Low Density Fragile States in Cohesive Powders", AJP, Vol. 74, # 8, p. 720, August 2006.

James Kakalios, "Resource Letter GP-1: Granular Physics or Nonlinear Dynamics in a Sandbox", AJP, Vol. 73, # 1, Jan. 2005, p. 8.

F-125: "Cartesian Diver Analog - Beans," DICK and RAE Physics Demo Notebook.

Steve K. Blau, "Stone Cold: Patterned Ground in Alpine and Artic Regions," Physics Today, April 2003, p. 23

Janice VanCleave, "A Rising Ball," Chemistry for Every Kid, p. 16-17.

Troy Shinbrot and Fernando J. Muzzio, "Nonequilibrium Patterns in Granular Mixing and Segregation," Physics Today, p. 25- 30, March 2000.

Mail Questions and Comments to: Dale Stille