December 01, 1989 Filed in: Demo Corner
Peter Scovil, Waterford District High School
Have you had difficulties explaining to students the complexities of the D.C. motor? Read More...
Tags: Electricity, Magnetism
October 01, 1989 Filed in: Demo Corner
George Vanderkuur, Ontario Science Centre
The heart is a mechanical pump that is used to move an incompressible fluid (i.e., blood) through a very elastic closed network of tubes. With each cycle of the “pump,” the whole system expands and contracts. Read More...
Tags: Fluids, Pressure
May 01, 1989 Filed in: Demo Corner
Gyula Lorincz, University of Toronto
Many of our old favourite electrostatics demonstrations can be improved using ping pong balls painted with graphite to replace pith balls. In particular, a simple but very sensitive electrostatic torsion balance can be used to demonstrate both the attraction of opposite charges and the repulsion of like charges. Read More...
March 01, 1989 Filed in: Demo Corner
Bill Konrad, Kent County Board of Education
The demonstration described in this column is one I learned as a teacher in summer school at the beginning of my teaching career. It is one that I have found to be very useful in teaching a number of concepts related to waves. Read More...
Tags: Waves and Sound