From A Beautiful Mind of Cikgu Dayang. A wide range of mathematics. Construct interactive mathematical models ranging from basic investigations about shape and number to advanced,. Animated illustrations of complex systems. Like many computer programs, Sketchpad. Files have their own file extension. Files are denoted as .

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Friday, January 28, 2011. What does cryolite do to the melting point of bauxite? The alumina must be molten for electrolysis to work,. Since the ions are not free to move in the solid state. Unfortunately, alumina has a high melting point. And it is not practical to do electrolysis at such a high temperature. In the middle of the nineteenth century. It was found that alumina dissolved in cryolite. Cryolite is sodium aluminium fluoride. Saturday, January 8, 2011.