Experiment - beer bottle and ping pong ball

In summary, the experiment involving a beer bottle and ping pong ball demonstrates the effects of air pressure on objects. By heating the air inside the bottle, the pressure increases and causes the ball to be sucked into the bottle. When the bottle is cooled, the pressure decreases and the ball is pushed out. This experiment is a simple but effective way to observe the principles of air pressure and its ability to manipulate objects.
  • #1
Oomph!
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Hello.
I have a question about experiment. You know it. You need beer bottle, water and ping pong ball.
You completely fill the beer bottle with water and you take the ball on the top of the bottle. The ball will not fall, if you take the beer bottle upside down.
OK, the atmospheric force have same value but opposite direction than hydraulic force, it is right? So, the ball will not fall. However, what about buoyancy force? It depents on it?
And the most important question - why does the ball fall if the beer bottle is not full of watter? The hydraulic force is not attract, only gravitational force and atmospheric force attract. The gravitational force is bigger? It is right? Or why?

Thank you very much!
Oomph!
 
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FAQ: Experiment - beer bottle and ping pong ball

What is the purpose of the experiment?

The purpose of the experiment is to demonstrate the principles of air pressure and surface tension by using a beer bottle and ping pong ball to create a vacuum effect.

What materials are needed for the experiment?

The materials needed for the experiment include a beer bottle, a ping pong ball, water, and a flat surface.

How do you conduct the experiment?

To conduct the experiment, fill the beer bottle with a small amount of water, place the ping pong ball on top of the bottle, and then quickly turn the bottle upside down while holding onto the ball. The ball should stay on top of the bottle due to the vacuum created by the air pressure and surface tension.

What scientific principles are demonstrated by this experiment?

This experiment demonstrates the principles of air pressure and surface tension. The inverted beer bottle creates a vacuum, causing the air pressure inside the bottle to be lower than the air pressure outside. This, coupled with the surface tension of the water, allows the ping pong ball to remain on top of the bottle.

Can this experiment be modified or expanded upon?

Yes, this experiment can be modified by using different types of bottles or balls, changing the amount of water in the bottle, or altering the surface the bottle is placed on. It can also be expanded upon by incorporating other objects and testing their ability to remain on top of the bottle.

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