Capillary Rise in Tube: What Happens if Length is Insufficient?

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    Capillary Rise Tube
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SUMMARY

The discussion centers on the phenomenon of capillary rise in tubes, specifically addressing the implications of insufficient tube length on water flow. It is established that the height of the water column (h) is directly related to the radius of the meniscus (R), as described by the equation hR = constant. When a capillary tube is shortened below the height of the water column, the meniscus radius must increase, affecting the water's ability to remain in the tube. The conversation emphasizes the relationship between the curvature of the meniscus and the adhesive forces between water and the tube material.

PREREQUISITES
  • Understanding of capillary action and meniscus formation
  • Familiarity with basic fluid dynamics concepts
  • Knowledge of surface tension and adhesive forces
  • Basic physics principles related to pressure and fluid behavior
NEXT STEPS
  • Research the mathematical relationship governing capillary rise, specifically hR = constant
  • Explore the effects of surface tension on fluid behavior in narrow tubes
  • Study the impact of tube diameter on capillary action
  • Investigate real-world applications of capillary action in various materials
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Students studying physics, particularly those interested in fluid dynamics, as well as educators seeking to clarify concepts related to capillary action and meniscus behavior in liquids.

Joel Jacon
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What happen when the capillary rise occur in a tube of insufficient length?

My teacher told me that hR = constant where h is height and R is radius of sphere of which the curved surface of meniscus firm a part.
She also told me that if h become less so R has to increase so radius of meniscus has to be large.

I didn't really get what she's meant.

If we take a capillary tube of height h and put it in water then, the tube become filled with water till height h. Now if we break a tube to make it of height less than h then will water flow out?
 
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This is homework.
Joel Jacon said:
radius of meniscus has to be large.
How large can the radius become? What does that imply?
Joel Jacon said:
will water flow out?
Work out the first question and the answer to this becomes obvious.
 
I told that I didn't understand what the teacher told. Any link on web that explain it would be helpful.
This is not a homework question.
 
I'll ask once more:
Bystander said:
How large can the radius become? What does that imply?
 
I told that's what my teacher said. If I had known the meaning I wouldn't have asked the question.
 
I can tell that someone has not explained this to you very well, or you were not listening!

All you need to know is that the curves of a meniscus are in effect pulling up the water, they are attracted to the glass. In a small tube the pulling area is a large proportion of the surface area and will be able to pull the water high and vice versa.
 

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