Watched some energy theater this afternoon--year one students trying to represent a body pushing a chair, beginning and ending in motion. Both groups I observed wanted to have energy-particles in the body be simultaneously chemical energy and kinetic energy. The second group said, "Well, how do we represent being two kinds of energy at the same time?" Wesley started trying to rub his belly and pat his head and said, "Can you walk doing this?" The group quickly realized they couldn't be both at the same time.
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