Baking powder submarine

A Baking powder submarine is a plastic toy submarine that dives and surfaces with the addition of baking powder. Baking powder submarines are sometimes misidentified as baking soda submarines, however baking soda alone does not react when placed in water. In 1953 Benjamin and Harry Hirsch, two brothers in a cosmetics company discovered that the ga...
Found on http://en.wikipedia.org/wiki/Baking_powder_submarine
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