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    whatevaxd's Avatar
    whatevaxd Posts: 26, Reputation: 1
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    #1

    Aug 12, 2009, 05:28 AM
    Which is the best Insulator?
    Which 1 will be the best insulator?

    Aluminum foil, cotton wool shredded paper or foam.

    Put it in order from best to worst would be nice
    whatevaxd's Avatar
    whatevaxd Posts: 26, Reputation: 1
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    #2

    Aug 12, 2009, 05:30 AM

    If possible can you explain why it was so effective?
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #3

    Aug 13, 2009, 10:33 AM

    Ok, here it is:

    Foam, shredded paper, cotton wool, aluminium foil.

    An insulator is one which prevents heat from being transferred.

    Foam traps air in the form of bubbles, and air is a good insulator.
    Shredded also traps air, but the air can escape, carrying heat away, even if that's really small.
    Cotton traps air less than the above materials.
    Aluminium foil is a good conductor, and hence, bad insulator.

    Hope it helped! :)

    PS- Remember that air is the real insulator in each case, and it is used in many ways, in 'thermos', between the walls in cold countries, etc.

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