Experiment: Balloons & Pressure | Horizontal Displacement

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In summary, during an experiment for school, the relationship between horizontal displacement and the size of a hole in a cork was investigated. The manipulated variable was the size of the hole, while the responding variable was the water's horizontal displacement. It was found that a smaller hole resulted in less displacement, which is explained by Bernouli's principle and the effects of pressure and flow rate. This phenomenon was also observed in a water balloon experiment, where the volume of water did not affect the results as long as the total surface area of the balloon was greater than its initial surface area.
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boioboi
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I did this experiment for school.
A balloon is filled with water, and then a cork with a drilled hole is plugged into the end. I'm trying to find the relationship between horizonatal displacement and the size of a hole in a cork. Manipulated variable is the size of the hole in the cork. Responding variable is the water's horizontal displacement. It turns out that horizontal displacement is directly related to the diameter of the hole. In other words, the smaller the hole, the less the displacement. Why does this happen? For example if you take a hose and cover a part of it, the water will go further.
Thanks a lot everyone!
 
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  • #2
The displacement (velocity actually) is related to pressure via Bernouli's principle. Pressure is determined by many factors, but in a hose, the pressure is limited by the flowrate. To have a higher flowrate you need less resistance at the nozzle, making for lower backpressure. By putting your thumb over the nozzle, you restrict the flow, increasing the back pressure, and increasing the throw of the water stream.

A water balloon is more difficult because the weight of the water has as much effect on the pressure as the elasticity of the balloon itself. So it depends a lot on the geometry of the setup.
 
  • #3
Well I found that the volume in the balloon does not matter, as long as the balloon's total surface area is greater than its initial surface area. I supported the big ball of water with one hand, with the other I held the spout. Initially, water was coming out parallel to the ground.
 

1. What is the purpose of this experiment?

The purpose of this experiment is to investigate the relationship between the pressure of a gas and its horizontal displacement when released from a balloon.

2. What materials are needed for this experiment?

The materials needed for this experiment include a balloon, a ruler, a pump, and a pressure gauge.

3. What is the procedure for conducting this experiment?

To conduct this experiment, first inflate the balloon to a specific pressure using the pump and note its initial horizontal displacement. Then, release the air from the balloon and measure the distance it travels horizontally. Repeat this process for different pressures and record the results.

4. What conclusions can be drawn from this experiment?

Based on the results of this experiment, it can be concluded that as the pressure of a gas inside a balloon increases, its horizontal displacement also increases.

5. How can this experiment be applied in real life?

This experiment can be applied in real life to understand the behavior of gases under pressure. It can also be used in industries such as aviation and engineering to study the effects of pressure on different materials and structures.

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