A fluid has a density of 1 040 kg/m³.If it rises to a height of 1.8 cm in a 1.0-mm diameter capillary tube,what is the surface tension of the liquid? Assume a contact angle of zero. A)0.046 N/m B)0.056 N/m C)0.092 N/m D)0.11 N/m

Question

Quizplus · Accepted Answer

Using the capillary rise equation: 
h = (2T cosθ)/(ρgr) 
where h = height of fluid rise, T = surface tension, θ = contact angle (zero in this case), ρ = density of fluid, g = acceleration due to gravity, r = radius of capillary tube 
Plugging in the given values: 
1.8 cm = (2T)/(1040 x 9.81 x 0.0005 cm) 
Solving for T: 
T = 0.046 N/m 
Therefore, the surface tension of the liquid is 0.046 N/m.

A Fluid Has a Density of 1 040 Kg/m3

A Fluid Has a Density of 1 040 Kg/m³