Write down the expression for the rise of liquid column in a capillary tube ?
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Answer:
We =p ( pi D square /4 ) hg
Explanation:
The surface on the top liquid inside the capillary tube has a trough ( cup) like shape .Assume that angle of contact with the walls be ( fi ) . Surface tension is the contact force per unit length along the circumference of top surface. This force pulls the liquid vertically upwards
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