Posted inEnvironment

Environmental Pollution, Types , Water, Soil, and Air

Definition of pollution Pollution is defined as ‘an undesirable change in physical, chemical and biological characteristics of air, water, and land that may be harmful to living organisms, living conditions and cultural assets. It is the unfavorable alteration of our surrounding because of pollutant addition. The pollution may be due to human activities or natural processes. […]

Posted inPhysics

Electric Charge

The branch of physics which deals with the study of charges at rest, the force between them, fields and potential due to these charges. It is called Electrostatics or static electricity or frictional electricity. Electric Charge The charge is something possessed by a material object that makes it possible for them to exert electrical force […]

Posted inPhysics

Gravitation

Gravitation is defined as the non-contact force of attraction between any two bodies in the universe (no matter how far the bodies are). The earth attracts (or pulls) all the bodies towards its center. The force with which the earth pulls the bodies towards it is called the gravitational force of the earth or gravity […]

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Sources of Energy

Any system which is capable of providing useful energy in a convenient form at a steady rate over a long period of time. Classification of Sources of Energy Renewable Sources of Energy These are the sources of energy which are being produced continuously in nature. These are inexhaustible e.g., solar energy, wind energy, hydro energy, […]

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Energy

Energy is measured as the capacity to do a work. It is a scalar quantity having SI unit same as the work i.e., joule (J) and CGS unit is erg. A larger unit of energy is kilojoule. An object having energy can exert a force (and hence do a work) on another object. Where it […]

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Work

Work When a body is displaced by applying a force on it, then work is said to be done. Example., a girl pulls a trolley and the trolley moves through a distance. In this way, she has exerted a force on the trolley and it is displaced. Hence, work is done. If a body is […]

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Force

Any action which causes pull or push on a body is called force. Forces are used in our everyday actions like pushing, pulling, lifting stretching, twisting and pressing. Force produces any of the following effects on the body. A force can Move a stationary body Change the state of rest or motion Stop a moving body […]

Posted inPhysics

Transmission of Heat

As we know that heat flows from the body at higher temperature to the body at a lower temperature, this flow of heat is known as transfer of heat from one place to another. For that, we have to learn about conduction, convection, and radiation. Conduction, Convection, and Radiation Conduction In solids, heat is transmitted […]

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