You will need:
- 2 good-quality rubber balloons
- Small piece of pipe or a tube (size should be slightly larger than the mouth of the balloon)
Bet your friends to get 2 balloons on a tube
of the same size. Try as they might, they can’t.
INSTRUCTIONS
- Take a balloon and attach it to one end of the pipe.
- From the other end of the pipe, blow into the balloon so that it may begin to stretch.
- Twist the mouth of the balloon so that the air may not escape.
- Ask a friend to help you attach the second balloon to the other end of the pipe while you hold the first inflated balloon in place.
- Once the second balloon has also been fitted on the
pipe, untwist the first balloon so that the air from this balloon may go into the second one. - Try getting the balloons to become of the same size.
RESULT
As soon as you untwist the mouth of the first balloon, the air from it travels into the second balloon just until the balloon is about to stretch. The second balloon does not stretch unless you squeeze the remaining air out of the first balloon. Balloons are shaped in such a way that their curvature leads to more tension in the rubber compressing the gas inside creating higher pressure in the balloon when it is smaller. Secondly, rubber is made of widely spaced randomly tangled molecules which are stiff initially until more pressure is exerted on it. As soon as it begins to get stretchy, it becomes less stiff. That is why no matter how hard you try, the pressure in one balloon will be greater than the other and you will not be able to maintain an equal amount of pressure in both balloons at the same time.
