The Physics Teacher, Vol. 41, No. 1, pp. 42–44, January 2003
©2003 American Association of Physics Teachers. All rights reserved.
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About the Author

Charles Sawicki has been a member of the physics faculty at North Dakota State University since 1979. He received a B.S. from the California Institute of Technology and a Ph.D. from Cornell. Physics Department, North Dakota State University, Fargo, ND 58105-5566; charles.sawicki@ndse.nodak.edu.

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