The Paper Wad That Won't
Go Into the Bottle
No great effort is required to put a small wad of paper into a
bottle. So why won't this paper wad do what you ask it to do?
What to do: Place the bottle on its side on
a table.
Wad a small piece of paper into a ball
about the size of a green pea. Then place
the paper wad bottle's mouth as seen
here.
Blow hard and fast as shown by the arrow in the
drawing.
What happens: Instead of flying into the
bottle, the paper wad is more likely to fly
out of the bottle's mouth and come back
toward you.
Why: The fast-moving air goes past the
paper wad and strikes the bottom of the
bottle. This increases the air pressure
inside the bottle. As that compressed air
rushes out, it carries the paper wad out
with it.
YOU NEED
•small mouth bottle
•piece of scrap paper