Surface Tension Problems And Solutions Pdf May 2026

Δ P = r 4 γ ​

The pressure difference across the surface of a soap bubble is given by: surface tension problems and solutions pdf

where \(γ\) is the surface tension, \(θ\) is the contact angle, \(ρ\) is the density of the liquid, \(g\) is the acceleration due to gravity, and \(r\) is the radius of the capillary tube. Δ P = r 4 γ ​ The

Substituting the given values, we get:

h = ( 1000 k g / m 3 ) ( 9.8 m / s 2 ) ( 0.05 m ) 2 ( 0.03 N / m ) c o s ( 0° ) ​ = 0.012 m \(θ\) is the contact angle

Δ P = 0.1 m 4 ( 0.05 N / m ) ​ = 2 P a A liquid with a surface tension of 0.07 N/m is placed on a solid surface with a contact angle of 60°. What is the force per unit length exerted on the liquid by the solid surface?