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http://www.youtube.com/watch?v=PXoDeyybpx0 A video explaining Isaac Newton's 1st Law of Motion Music: Miss Sarajevo by U2 & Luciano Pavarotti
http://www.youtube.com/watch?v=Vais8pL0w8U 5 grams of sodium polyacrylate is poored into a dish, then 100 mls of water is added. notice how much it absorbs