Contents of the September/October 1995 issue of Quantum
by Nikolay Vasilyev and Victor Gutenmacher
A look at the intriguing figures found by Chandler Davis and Donald Knuth and the mathematics behind them.
On the Nature of Space Magnetism
by Alexander Ruzmaykin
Untangling the turbulent source of the hydromagnetic dynamoin outer space.
by John Adam
An amusing collection of so-called Fermi problems(order-of-magnitude estimates).
Clarity, Reality, and the Art of Photography
by Mark L. Biermann
How depth of field affects the blurrinessintentional or notin photographs.
At the Blackboard: The Quadratic
by Vladimir Boltyansky
A refresher course in this staple of the high school curriculum.
In the Lab: A tell-tale trail and a chemical clock
by N. Paravyan
Two simple experiments with alternating current.
Follow-up: Life on an Accelerating Skateboard
by Albert A. Bartlett
What was wrong with figure 1 in the March/April Physics Contestproblem? And what is weight anyway?
Kaleidoscope: All Bent out of Shape
A look at the many forms of deformation.
Physics Contest: Split Image
by Arthur Eisenkraft and Larry D. Kirkpatrick
What happens to an image when you slice a lens in two?
Math Investigations: Problems Beget Problems
by George Berzsenyi
A review of readers replies, including a visit from a Quantumfounding editor.
Toy Store: Winning Strategies
by Vladimir Dubrovsky
Detailed solutions to the game problems offered in the July/AugustKaleidoscope.
How Do You Figure?: Challenges in Physics and Math
Brainteasers: Just for the Fun of It!
Scientific crossword puzzle.
Answers, Hints & Solutions
Copyright © 1995 National
Science Teachers Association