http://phet.colorado.edu/en/simulation/soluble-salts
http://wearenotflash.com/samples/water-hardness-interactive/
http://indianapublicmedia.org/amomentofscience/soap-hard-water-mix/
http://www.popularmechanics.com/home/interior-projects/how-to/a150/1275126/
No comments:
Post a Comment