Contents of the September/October 1998 issue of Quantum
Flexible Polyhedral Surfaces
by V. A. Alexandrov
Do closed, flexible polyhedrons (without self-intersections) exist?
Why Dont Planes Fly with Cats and Dogs?
by V. Mescheryakov
Two friends contemplate the physics behind their flight delay.
by I. Sabitov
Whats true locally according to Euclid may not remain valid as we travel afield.
by O. V. Rudenko and V. O. Cherkezyan
The nature and uses of intense acoustic waves.
Kaleidoscope: Do You Really Know Vapors?
Its not just the heatits the humidity. What physical facts underlie this common summertime refrain?
Physics Contest: Up, Up and Away
by Larry D. Kirkpatrick and Arthur Eisenkraft
Fire up your hot-air balloon and rise to the challenge.
At the Blackboard I: High-speed Conservation
by A. Korzhuyev
Tackling problems dealing with bodies moving at near the speed of light.
At the Blackboard II: Auxiliary Polynomials
by L. D. Kurlyandchik and S. V. Fomin
Constructing helper equations is sometimes the best way to get to the root of the problem.
At the Blackboard III: In Focus
by A. Dozorov
A sharp glance at the optics of eyesight.
In the Lab: Magnetic Fieldwork
by D. Tselykh
How to measure the energy stored in a magnetic field.
Musings: I Can See Clearly Now
by David Arns
Cowculations: Fly Zapper
by Dr. Mu
Dr. Mu pilots an ultralight plane to zap black flies with bolts from the blue.
How Do You Figure?: Challenges in Physics and Math
Brainteasers: Just for the Fun of It!
Scientific crossword puzzle.
Thoughts from our readers.
Answers, Hints & Solutions
Copyright © 1998 National Science Teachers