Hydrostatic Pressure Explained: Why Does Water Flow & Stop?

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SUMMARY

The discussion centers on the principles of hydrostatic pressure and fluid dynamics, specifically how water behaves in a tube when subjected to external forces. When air is blown into one end of a tube submerged in a bucket of water, the pressure difference causes water to flow out of the tube. This flow ceases when the tube is raised due to the equalization of pressure, as the water seeks to maintain the same level as that in the bucket. The analogy of water acting like a spring effectively illustrates these concepts.

PREREQUISITES
  • Understanding of hydrostatic pressure principles
  • Basic knowledge of fluid dynamics
  • Familiarity with pressure differentials
  • Concept of equilibrium in fluids
NEXT STEPS
  • Research the principles of hydrostatic pressure in fluids
  • Learn about fluid dynamics and Bernoulli's principle
  • Explore the concept of pressure differentials in various fluid systems
  • Study the behavior of fluids in equilibrium and how it affects flow
USEFUL FOR

This discussion is beneficial for students of physics, engineers working with fluid systems, and anyone interested in understanding the behavior of liquids under pressure.

sameeralord
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I don't understand.

If there is a bucket of water and you put a tube inside the bucket and blow at one end and then release water flows out of the tube. Why does this happen. Also when you raise this tube water stops. Why? This is not homework or anything. :smile:
 
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sameeralord said:
I don't understand.

If there is a bucket of water and you put a tube inside the bucket and blow at one end and then release water flows out of the tube. Why does this happen. Also when you raise this tube water stops. Why? This is not homework or anything. :smile:

Because the water is acting like a spring. Push on one end of a spring , when you release it it springs back.

It's the water inside the tube tying to stay at the same level as that in the bucket - in the same way a spring will try to keep it's end at one position before you pushed on it.
 

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