Science > Physics > Force > Moment of Force In this article, we shall study the concept of moment of force, its characteristics, and applications in everyday use. Rigid Body: A rigid body is one whose geometric shape and size remains unchanged under the action of an external force. In the rigid body, the distance […]
Science > Physics > Force > Couple In this article, we shall study the concept of a couple, its characteristics, and applications. Parallel Forces: Forces which are not concurrent and their lines of action are not the same and parallel to each other then the forces are called parallel forces. Example: Children sitting on a […]
Science > Physics > Force > Centre of Mass and Centre of Gravity In this article. we shall study the concept of centre of mass and centre of gravity of a body and methods to locate them. Concept of Centre of Mass: The entire mass of a body is supposed to be concentrated at a […]
Science > Physics > Force > Law of Conservation of Momentum In this article, we shall study the law of conservation of momentum and its proof. Statement: When the resultant external force acting on a system is zero, the total linear momentum of the system is constant. OR When no external force acts on a […]
Science > Chemistry > Chemical Equilibrium > Physical Equilibrium There are two types of equilibrium: a) physical equilibrium and b) chemical equilibrium. In this article, we shall study physical equilibrium. State of Equilibrium: In many chemical reactions, it is observed that they do not proceed to completion when they are carried out in a closed […]
Science > Chemistry > Chemical Equilibrium > Types of Chemical Reactions In this article, we shall discuss only those types of chemical reactions which are linked to the topic of chemical equilibrium. Chemical Reaction: In a chemical reaction one or more substances, called reactants undergo a chemical change to produce new substances called products of […]
Science > Physics > Heat Transfer > Conduction Heat always gets transferred from the body and higher temperature to a body at lower temperature heat transfer can take place in three ways a) Conduction b) Convection and c) Radiation. In this article, we shall study the heat transfer by the conduction. Conduction: If one end […]
Science > Physics > Cathode Rays and X- Rays > Cathode Rays In 1859, Julius Plucker started the study of the conduction of electricity through gases at low pressure in the discharge tube. William Crooke, J. Perrin, J. J. Thomson did a further investigation in this field. In 1885, Sir William Crookes carried out several […]
Science > Physics > Cathode Rays and X- Rays > X-Rays Discovery of X- Rays: If a discharge tube is highly evacuated so that the pressure in the tube is of the order of 0.01 mm of mercury, certain rays are emitted by the cathode in the form of bluish streamers. These rays are called […]
Science > Physics > Heat Transfer > Convection and Radiation In this article, we shall study different modes of heat transfer. Convection: Convection is a mode of heat transfer through a material medium in which heat energy is carried from one place to another by actual motion “migration” of heated matter. Consider a beaker containing […]