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"Under Pressure" Experiments

1. Air Pressure 1 (Balloon/Cup)  | 2. The Cartesian Diver  | 3. The Paper/Bottle Experiment  | 4. The Card and Glass Experiment

5. The Floating Ping Pong Ball | 6. Floating Ball in a Cup!  | 7. Make a Barometer

Air Pressure 6
(Bernoulli's Principle Exp. 2)

Experiment: To demonstrate Daniel Bernoulli's Principle - lower vs higher pressure!

Materials:

You will need:

Yogurt pot/Paper cup
1 straw
BlueTack
Scissors
1 ping pong ball
Lots of puff!
 

Method:

What you have to do: 

1) Poke a hole big enough for the straw to fit tightly at the bottom of the cup.

2) With the cup upside down, stick the straw into the hole, with only a little bit of the straw in the cup and secure it by sticking bluetack around it.

3) Put the ping pong ball on the table and put the cup upside-down over the ball, but hold the cup a little bit above the table so it's not touching the table.

4) Blow into the straw and see what happens ...

Result: When you blow, the ball should rise up into the cup.

Conclusion: When you blow, you are blowing moving air, which has lower pressure. Therefore, the higher pressure around and under the ball pushes the ball up into the cup!

Sixth Class Experiments