Surface tension mathematical formula.

In summary, the conversation discusses a U shaped wire with a movable wire fixed on it and a liquid bubble in between. The question is how much force is needed to move the wire a distance of l. The formula for surface tension is F=Sl, but the speaker is confused because they only see one surface. The technician clarifies that there are actually two surfaces - an upper and lower surface - due to a film of liquid. The issue is resolved and the speaker expresses gratitude to the technician.
  • #1
vkash
318
1
consider a U shaped wire piece. a movable wire is fixed on it and their is liquid bubble in between them. If we move wire through distance l what force we need to apply
surface tension basic formula is F=Sl. so it should Sl but it is 2Sl i cn't understand can you please help.
 
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  • #2
There are 2 surfaces
 
  • #3
technician said:
There are 2 surfaces
where are two surfaces. there is only one surface of liquid.
 
  • #4
Your wording sounds to me that there is a film of liquid so there is an upper surface and a lower surface.
 
  • #5
technician said:
Your wording sounds to me that there is a film of liquid so there is an upper surface and a lower surface.
Oh!
this was so simple
very very thanks technician.
 
  • #6
It is a pleasure...let's hope that all your problems are as easily sorted out as this one !
 

FAQ: Surface tension mathematical formula.

1. What is the mathematical formula for calculating surface tension?

The mathematical formula for calculating surface tension is γ = F/L, where γ is the surface tension, F is the force acting on the surface, and L is the length over which the force is acting.

2. How is surface tension related to intermolecular forces?

Surface tension is related to intermolecular forces because it is a measure of the cohesive forces between molecules at the surface of a liquid. The stronger the intermolecular forces, the higher the surface tension.

3. Can surface tension be measured experimentally?

Yes, surface tension can be measured experimentally using a variety of methods such as the drop weight method, the du Noüy ring method, or the capillary rise method.

4. What factors affect surface tension?

Surface tension is affected by factors such as temperature, the type of liquid, and the presence of impurities or additives. It is also influenced by the intermolecular forces between molecules and the geometry of the liquid's surface.

5. How does surface tension play a role in everyday life?

Surface tension plays a significant role in everyday life, from the formation of raindrops to the ability of insects to walk on water. It is also essential in activities like cooking, where surface tension helps to hold bubbles in dough or prevent oil from splattering. Surface tension is also crucial in the functioning of our lungs, where it helps to keep the alveoli from collapsing.

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