schoolscienceproject.blogspot.in
Weight of air
on paper
Lay a cigar-box
lid over the edge of a smooth table. Spread an undamaged sheet of newspaper and
smooth it firmly on to the lid. Hit the projecting part of the lid hard with
your fist. It breaks, without the paper flying up. The lid is only slightly
tilted when it is hit. In the space formed between the lid, newspaper and
table, the air cannot flow in quickly enough, so that there is a partial
vacuum, and the normal air pressure above holds the lid still as if it were in
a screw clamp.
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