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    3. why a glass bowl kept in another big glass bowl of vegetable oil is invisible
    why a glass bowl kept in another big glass bowl of vegetable oil is invisible

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    0  Views: 683 Answers: 1 Posted: 11 years ago
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      Read here...http://www.abc.net.au/science/surfingscientist/pdf/teachdemo27.pdf

      11 years ago. Rating: 4
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