Showing posts with label WHY ? The card doesn't fall down because of the difference in air pressure (the pressure on the card is greater than that of the air in the glass) AND surface tension and adhesion hold the card up.. Show all posts
Showing posts with label WHY ? The card doesn't fall down because of the difference in air pressure (the pressure on the card is greater than that of the air in the glass) AND surface tension and adhesion hold the card up.. Show all posts
Monday, 7 April 2014
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