Demonstrations

Radian Disk

Code Number :	1A50.10
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 :	Good
Principle :	Measurement of the Radian
Area of Study :	Mechanics
Equipment :	Radian disk, Screwdriver shaft.
Procedure :	The radian disk can be used in several ways. One way is to measure the radius and compare them to the outer arc. The disk can also be set on the screwdriver shaft through the hole in the middle so that it may be set up in a vertical fashion for easy turning.

References

Mel Buchanan, Mark Graham, and Tom Hunter, "A Nostalgic Demonstration of the Radian," TPT, Vol. 37, # 4, p. 253, (April 1999).

Robert C. Hilborn, "Puzzle Solved", TPT, Vol. 34, # 1, Jan. 1996, p. 69.

John M. McKinley, "The Mil and the Military", TPT, Vol. 34, # 4, Apr. 1996, p. 197.

Robert A. Morse, "Whence the "Grade"," TPT, Vol. 33, # 2, p. 70, Feb. 1995.

Robert J. Whitaker, "Whence the "Radian"?", TPT, Vol. 34, # 7, Oct. 1994, p. 444.

Gordon J, Aubrecht, II, Anthony P. French, Mario Iona, and Daniel W. Welch, "The Radian - That Troublesome Unit", TPT, Vol. 31, # 2, Feb. 1993, p. 84.

E. S. Oberhofer, "r-r-r!", TPT, Vol. 31, # 4, Apr. 1993, p. 196.

Bruce L. Scott, "It's Obvious - Now", TPT, Vol. 31, # 5, May 1993, p. 262.

E. S. Oberhofer, "What Happens to the "Radians"?," TPT, Vol. 30, # 3, p. 170, March 1992.

Anthony P. French, "What Happens to the "Radians"?," TPT, Vol. 30, # 5, p. 260, May 1992.

M-16a, Wallace A. Hilton, "Physics Demonstration Experiments."

Mail Questions and Comments to: Dale Stille