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Tuning-fork and a card

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Szczepan Bia�ek

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Dec 7, 2009, 1:03:55 PM12/7/09
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I have come across on the descriptions of the experiments with the
tunig-forks and a cards: http://www.wbabin.net/science/dinu7.pdf (pages 7 -
11)
They attracted in XIX century. Is the same today?
What about the water waves? Do they attract large obiects?
S*


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