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 […]
Some liquids like water Kerosene flow very easily while some liquids like honey, glycerine do not flow easily. The property by virtue of which a liquid or a fluid opposes the relative motion between two adjacent layers is called viscosity. The force which opposes the relative motion between two adjacent layers in a fluid is […]
Biology > Microbes in Human Welfare > Biofertilizers and BioControl Agents In this article, we shall study the use of microbes as biocontrol agents and biofertilizers. Microbes as Biocontrol Agents: Chemical insecticides and pesticides are toxic and extremely harmful, to human beings and animals. These chemicals pollute the environment (soil, groundwater), fruits, vegetables, and crop […]
In this article, we shall study the characteristics and examples of Division Thallophyta. (Greek – Thallus – plant body without root, stem, and leaves; phyton – a plant) Characteristics of Division Thallophyta: Members of division Thallophyta are the most primitive and simple plants. The plant body is not differentiated into root, stem, and leaves. They are […]