BALLOONS AND PINS

WE NEED: 

• Balloons (2)
• Pins (20 )

HOW TO DO IT:

1. Take a pin and place it on the table.

2. Take your balloon and see what happens when you put it on the pin.

3. Next take the whole full of pins

4. Then, take another balloon and try doing the same thing and see what happens.

PREDICTIONS:

RESULTS:

This is because of pressure. You have a certain force that the gas particles, which are always moving, bouncing off the sides of the balloon exert to keep the balloon inflated. When you use a needle, it is a very very tiny area at the tip of the needle, so only a little force gives a lot of pressure (pressure = force/area).

The reason it does not pop with your finger is because it is not very much pressure as you have a much greater area, and as you can see from the equation above, the same force has considerably less pressure.

Once this hole is created, the particles in the air inside the balloon would much rather be at a lower energy (moving slower) than they are contained inside the balloon. They instantaneously rush out to an area of lower pressure (the surrounding), thus you have a pop!

OUR OPINION: