document.write( "Question 1209182: Four cubes of ice with an edge of 4 centimeters each are left to melt in a cylindrical glass with a radius of 6 cm. how high will the water rise when they have melted? \n" ); document.write( "
Algebra.Com's Answer #847781 by ikleyn(52781)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "Interesting fact from Science is that the volume of ice before melting
\n" ); document.write( "is GREATER than the volume of the water after melting.\r
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\n" ); document.write( "\n" ); document.write( "It is why the ice always floats on the surface of the water
\n" ); document.write( "and does not sink in water.\r
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\n" ); document.write( "\n" ); document.write( "Usually, school students learn this fact when they are 6th or 7th grade.\r
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\n" ); document.write( "\n" ); document.write( "The difference in volumes is not so small. The ratio of the ice density
\n" ); document.write( "to the water density at normal conditions is about 0.92;
\n" ); document.write( "so the difference of volumes is about 8.7%.\r
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\n" ); document.write( "\n" ); document.write( "Again, although the chemical formula of water in fluid state and in solid state
\n" ); document.write( "is the same H2O, their phase states are different.\r
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\n" ); document.write( "\n" ); document.write( "There is no any logical or physical reason to assume that their volumes
\n" ); document.write( "before melting and after melting are the same.\r
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\n" ); document.write( "\n" ); document.write( "We make this assumption with the only reason to solve the problem,
\n" ); document.write( "but physically and logically we have no solid base for making this assumption.\r
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\n" ); document.write( "\n" ); document.write( "                    Physically, this assumption is wrong.\r
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\n" ); document.write( "\n" ); document.write( "        Physically, at the phase change, the mass conserves, \r
\n" ); document.write( "\n" ); document.write( "              but the volume does not necessary conserve.\r
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