Al Tobias (wat4y) - Office: Gibson S123 & Physics 218, (434) 924-0538
Demonstrations are cataloged according to PIRA Bibliography
PLEASE REQUEST DEMOS WELL IN ADVANCE
Due to Physics Building renovations, the lead time to set up demo requests has increased due to the need to transport equipment across campus. Please be kind and let me know well ahead of time what you need.
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video - Thermal Conductivity
Purpose:To demonstrate thermal conduction along a metal rod.
Attach four steel balls to each of three different rods with modeling clay. The rods are made of COPPER (left), ALUMINUM (front right) and STAINLESS STEEL (back right) in the video above. Light the burner and wait a few minutes. As the rods heat up, the balls will begin to fall as the clay softens and loses grip. Discuss the different rates of thermal conductivity between the copper, aluminum, and stainless steel rods and why the steel balls fall off one rod before another. NOTE: Only one or two of the balls will fall from the stainless steel balls. Don't wait for them all to drop. Turn off the burner after all the balls have dropped from the copper and aluminum rods.
Thermal Conductivity (W/mK)