Science > Physics > Surface Tension >Change in Surface Energy In this article. we shall study numerical problems on the change in surface energy due to breaking of drop or coalescence of number of drops into a one drop. Example – 01: Two mercury drops one of radius 2 mm and the other of radius […]
Science > Physics > Surface Tension > Concept of Surface Energy In this article, we shall study the concept of surface energy, relation between the surface energy and surface tension. A molecule on the surface of a liquid experiences a downward pull due to surface tension. If a molecule deep inside the liquid is to […]
Science > Physics > Surface Tension > Angle of Contact When water is taken in a glass vessel, the free surface of the water near the walls is curved concave upward. If mercury is taken in a glass vessel, the free surface of mercury near the walls is convex upwards. When the liquid is in […]
Science > Physics > Surface Tension > Laplace’s Law of Spherical Membrane In this article, we shall study Laplace’s Law about the excess of pressure inside a drop or a bubble of a liquid. Excess of Pressure Inside a Drop of a Liquid and Soap Bubble: Due to surface tension, free liquid drops and bubbles […]
Science > Physics > Surface Tension > Numerical Problems on Capillary Action In this article, we shall study to solve problems on capillary action. Important Formulae: and Jurin’s law, hr = constant where h = height of liquid level in the capillary T = Surface tension ρ = Density of liquid r = Radius of […]
Science > Physics > Surface Tension > Capillary Action A capillary tube is a tube with a very fine bore. The phenomenon of a rise and fall of a liquid inside a capillary tube when it is dipped in the liquid is called capillary action or capillarity. When a glass capillary is immersed in water, […]