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 […]
Science > Physics > Circular Motion > Introduction Concept of Circular Motion: The motion of a particle along the circumference of a circle is called circular motion. It is a translational motion along a curved path. Examples: The motion of the earth around the sun. The motion of a satellite around the planet. The motion of […]
Science > Chemistry > Everyday Chemistry > Mechanism of Action of Drug In this article, we shall study the meaning of the term drug, and the mechanism of actions of drugs. Drugs: The word dug is derived from a French word drogue which means a dry herb. Drugs are chemicals of low molecular mass which […]
Science > Physics > Communication > The Internet and Other Technologies The Internet: According to Webopedia, the Internet is a worldwide system of connected networks. Each network consists of millions of computers, servers, routers, and printers. The Internet is also called the Information Super Highway. The data move across the networks because all the service providers use […]
Science > Physics > Communication > Amplitude Modulation The first amplitude modulated signal was transmitted in 1901 by a Canadian engineer named Reginald Fessenden. He used a continuous spark transmission and placed a carbon microphone in the antenna lead. This transmission was very crude, signals were audible over a distance of a few hundred metres. The […]