Contents of the July/August 1997 issue of Quantum
Colder Means Slower
by Henry D. Schreiber
The elegant and wide-ranging Arrhenius equation tells us how much slower.
All Sorts of Sorting
by P. Blekher and M. Kelbert
An introduction to the comparatively young science of pattern recognition theoryspecifically, a look at various classification methods.
Can You See the Magnetic Field?
by Alexander Mitrofanov
How to use your TV in a new and enlightening way.
Kaleidoscope: The Complete Quadrilateral
by I. F. Sharygin
Its a figure formed by four straight lines on the plane none of which are parallel and no three of which pass through the same point. This article examines some interesting properties of complete quadrilaterals.
Physics Contest: A Physics Soufflé
by Arthur Eisenkraft and Larry D. Kirkpatrick
In physics as in cooking, you can have too much of a good thing. When is a piece of information crucial, and when can you get by without it?
Math Investigations: Counting Problems in Finite Groups
by George Berzsenyi
In his last column for Quantum, Dr. Berzsenyi presents a problem from the Research Experiences for Undergraduates program.
At the Blackboard I: Whirlwinds over the Runway
by Albert Stasenko
A look at the vortices created by large planes near the ground.
Cowculations: Out Standing in the Field
by Dr. Mu
How to divvy up the championship purse in a storm-shortened season of baseball: the Holsteins vs. the Jerseys.
At the Blackboard II: Remarkable Limits
by M. Crane and A. Nudelman
Two sequences created by two different types of means (arithmetic, geometric, or harmonic)repeatedly taking the means of the means obtainedconverge to a common limit. This article presents various ways of finding that limit.
Fundamentals: Internal Energy and Heat
by Alexey Chernoutsan
Why does Q appear in the reference tables and not delta U?
Feedback: Caution: No Air Brakes on This Planet!
by David P. Stern
A response to A Planetary Air Brake (Quantum, March/April 1997).
How Do You Figure?: Challenges in Physics and Math
Brainteasers: Just for the Fun of It!
The Quantum Bulletin Board.
Scientific crossword puzzle.
Answers, Hints & Solutions
Copyright © 1997 National
Science Teachers Association