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Science Expiriment Video

I found this really cool science experiment on You Tube so I wanted to share it with you.

 

This experiment is about fake snow.

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  1. October 5, 2011 at 8:43 pm

    Hi Stefan!
    I really liked this video. I always wanted to see snow in Thailand and now when I make this, I might have a chance to see snow in my house too!!
    Thank-you for sharing, Vicky

  2. Melis
    October 6, 2011 at 5:17 pm

    I wonder what the white powder is, but thanks for showing this video!

    • Mr. Sam
      October 6, 2011 at 5:37 pm

      He said it was some kind of “absorbent polymer”. What does that mean?

  3. October 10, 2011 at 6:24 pm

    Superabsorbent polymers (SAP) (also called slush powder) are polymers that can absorb and retain extremely large amounts of a liquid relative to their own mass.[1]

    Water absorbing polymers, which are classified as hydro gels when cross-linked,[2] absorb aqueous solutions through hydrogen bonding with water molecules. A SAP’s ability to absorb water is a factor of the ionic concentration of the aqueous solution. In deionized and distilled water, a SAP may absorb 500 times its weight (from 30–60 times its own volume), but when put into a 0.9% saline solution, the absorbency drops to maybe 50 times its weight. The presence of valence cations in the solution will impede the polymers ability to bond with the water molecule.

    The total absorbency and swelling capacity are controlled by the type and degree of cross-linkers used to make the gel. Low density cross-linked SAP generally have a higher absorbent capacity and swell to a larger degree. These types of SAPs also have a softer and more sticky gel formation. High cross-link density polymers exhibit lower absorbent capacity and swell, but the gel strength is firmer and can maintain particle shape even under modest pressure.

    The largest use of SAP is found in personal disposable hygiene products, such as baby diapers, adult protective underwear and sanitary napkins.[3] SAP was discontinued from use in tampons due to 1980s concern over a link with toxic shock syndrome. SAP is also used for blocking water penetration in underground power or communications cable, horticultural water retention agents, control of spill and waste aqueous fluid, artificial snow for motion picture and stage production. The first commercial use was in 1978 for use in feminine napkins in Japan, disposable bed liners for nursing home patients in the USA.

    • October 10, 2011 at 6:25 pm

      Got this information from Wikipedia 😛

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