In this article, we shall study numerical problems to find surface tension of liquid. Science > Physics > Surface Tension > Numerical Problems on Surface Tension Example – 1: A needle 5 cm long can just rest on the surface of the water without wetting. What is its weight? Surface tension of water = 0.07 […]
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 > Surface Tension in Everyday Life In this article, we shall study different phenomena due to surface film formed on the liquid surface due to surface tension. Examples of Surface Tension (Due to formation of the surface film): When a glass rod is dipped in water and taken out […]
Science > Physics > Surface Tension > Surface Tension In this article, we shall study the concept of the surface tension, its characteristics and the factors affecting it. Intermolecular Forces: Between any two molecules, there exists a force of attraction. This force is called the intermolecular force. These intermolecular forces of attraction are of two […]
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, […]
In this article, we shall study the meaning of notice, actual notice, constructive notices, and instances where the Court presumes the knowledge of facts. Notice: A person is said to have a notice of a fact when he actually knows that fact, or when, but for wilful abstention from an inquiry or search which he […]
Science > Physics > Circular Motion > Angular Displacement, Velocity, and Acceleration Angular Displacement: For a particle performing a circular motion the angle, traced by the radius vector at the centre of the circular path in a given time is called the angular displacement of the particle at that time. It is denoted by ‘θ’. Its […]