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Liquid Nitrogen Show
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===Ball and Hoop=== # Show the Ball and Hoop to the audience, and how the ball currently cannot fit through the hoop. # Place the ball into the Liquid Nitrogen. While it is cooling, use the blowtorch to heat the hoop. Remind the audience of the Bimetallic plate, and how the metal expands and contracts slightly. # After heating the ball for at least 30 seconds, turn off the blowtorch. Quickly take the ball out of the liquid Nitrogen, and show that it now fits through the hoop!
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