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Contents of the July/August 1999 issue of Quantum 


Feature articles

Arithmetic obstacles

by N. Vaguten

Can you get there from here?
Arithmetic obstacles | Art by Sergey Ivanov
Art by Sergey Ivanov

Vacuum

by A. Semenov

Making something out of nothing. 

The new Earth

by A. Stasenko

We must approach global construction with the utmost care. 

2-adic numbers

by B. Becker, S. Vostokov, and Y. Ionin

Employing Hensel's rational insights. 

Departments

Physics Contest: Image charge

by Larry D. Kirkpatrick and Arthur Eisenkraft

Electrostatic inquiry. 


 

Kaleidoscope: The pointed meeting of a triangle's altitudes

by I. F. Sharygin

Various ways of proving a well-known theorem.

At the Blackboard I: A cardioid for a mushroom picker

by S. Bogdanov

The curvy path of a lost forager. 

At the Blackboard II: Electric currents on coulomb hills

by E. Romishevsky

The ups and downs of a circuit. 

At the Blackboard III: Completing a tetrahedron

by I. F. Sharygin

A geometrical trick of the trade.


Looking Back: Light in a dark room

by V. Surdin and M. Kartashev

History of the camera obscura. 

Cowculations: Contented cows

by Dr. Mu

Finding all ways to sum the digits in a number to zero. 

How Do You Figure?: Challenges in Physics and Math


Brainteasers: Just for the Fun of It!

Check out this sample!

Crisscross Science

Scientific crossword puzzle. 

Happenings

Bulletin Board. 

Answers, Hints & Solutions


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