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CENTRIPETAL FORCE:
SPARKS FROM A GRINDING WHEEL








EQUIPMENT
    redball.gif (326 bytes) Motor Driven Grinding Wheel
    redball.gif (326 bytes) Gadolinium Rod
   


NARRATIVE
            A gadolinium rod is applied to a motor driven grinding wheel producing sparks. As the sparks fly off, they do so in a straight line tangent to the wheel's circumference.