schoolscienceproject.blogspot.in
Balloon in
the bottle
Do you believe
that it is always possible to blow an ordinary balloon right up! You will be
surprised: push a balloon into a bottle and stretch its mouth-piece over the
opening. Blow hard into the balloon. It is only possible to stretch the rubber
before your breath runs out. As the pressure of the air in the balloon
increases, so does the counter-pressure of the air enclosed in the bottle. It
is soon so great that the breathing muscles in your thorax are not strong
enough to
overcome it.
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