Teacher Demo: Limiting Reagent – Is More Better?

This demonstration/activity introduces students to the concept of limiting reagent in a chemical reaction. Too often, students think that one can produce more product by using larger quantities of reactants. This demonstration/activity is specifically designed to...

Teacher Demonstration: The Doppler Effect

The Doppler Effect, when applied to light from a star, can be used to determine if the star is approaching or receding. This is the basis for the generally accepted theory that the universe is expanding. This demonstration shows the Doppler Effect applied to sound....

Teacher Demo: Double Ball Drop

A head on elastic collision between an object with mass M and an object with mass 3M traveling with equal speeds results in all the kinetic energy of the system being transferred to the smaller mass. In this demonstration we try to follow this arrangement to produce a...
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