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UPEF A3 Movie 1: Interaction between magnets in a vacuum (no air)

UPEF A3 Movie 2: Magnetic carts separated by different distances—a demonstration of magnetic potenial energy (MPE)

UPEF A3 Movie 3: Interaction between a B-tape and a T-tape

UPEF A3 Movie 4: Interactions between two charged plastic coffee stirrers