Okay so which question so the F(upward shown above) is the force that leads to a

Question

Okay so which question so the F(upward shown above) is the force that leads to a new 'h' as seen above. Using this how would I be able to find the pressure caused by this surface tension in the capillary tube? (I'm this that its like since P=F/A so the area would be the surface area of half a sphere)? What about the pressure difference to the atmospheric pressure and to the water inside the tube?

Capillary Action Capillary action occurs when the adhesion to the walls is stronger than the cohesive forces between the liquid molecules. The height to The height h to which which capillary action will take water in a capillary action will uniform circular tube is limited by surface lift water depends tension. Acting around the circumference, the upon the weight of upward force is water which the surface tension will lift T2rr upward NT The height to which the liquid can be lifted is given by Since it is 2T weight limited it will rise prg T surface tension higher in a Show calculation smaller tube. p density of liquid

Explanation / Answer

If the liquid -gas interface is concave towards the liquid side and the pressure drop across the interface will be (P-Patm)=2*T/r, where r is the radius of curvature of the interface. This pressure drop is called the capillary pressure drop. If the contact angle theta the liquid makes with the tube wall is zero (perfectly wetting), then r is equal to the radius of the tube (r_0), otherwise r.

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