index card over a glass of water stays put when you turn the glass over, why?

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2007-03-02 04:56:58 · 2 answers · asked by RDubs 2 in Science & Mathematics ➔ Other - Science

All the card does is disallow air from entering the glass. Without the air, a vacuum holds the card in place and the card holds the water.

2007-03-02 05:12:53 · answer #1 · answered by H.C.Will 3 · 0⤊ 1⤋

A vacuum is created that holds the card in place

2007-03-02 13:01:24 · answer #2 · answered by Dice 3 · 1⤊ 0⤋