December 01, 1989 Filed in:
Demo CornerPeter 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 CornerGeorge 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 CornerGyula 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...Tags: Electricity
March 01, 1989 Filed in:
Demo CornerBill 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
