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Energy
Definition energy can be defined as under;
Energy is an agent which is responsible to do work Or The capacity of doing some work is known as energy Or The capacity or ability of doing work is known as energy. • Units of energy are; Joule, Erg, Kilo watt Hour, British thermal unit volt, calorie. Different forms of energy 1. Kinetic energy The kinetic energy is that energy which is possessed by a body by the means of its motion or The energy due to the motion of a body known as kinetic energy. 2. Potential energy The energy which is possessed by a body by the means of its position or configuration is known as potential energy. 3. mechanical energy Mechanical energy is that energy, which possessed by a body by the virtue of its position, configuration, and change of its position. . Resources of energy Two main sources of energy Coal, wood, water Oil, gas, nuclear fuel is conventional or primary sources. And Solar energy, tidal energy, wind energy, and geothermal energy are non-conventional or secondary sources The energy sources again can be divided into two categories • Renewable resources include non-conventional sources of energy. • Non renewable resources Kinds of energy • Chemical energy Energy stored in compound is known is chemical energy • Coal, petroleum are the sources of chemical energy. • Heat energy Heat energy is used in many purposes as in household for cooking, in industries as a source of energy and for power generation. Now a day’s electrical energy is produced by solar energy. Solar energy It is the largest source of energy. It is used automatically for photosynthesis and production of glucose and fruits and natural products Mechanical energy The energy is produced by means of any other energy • Electrical energy coverts into washing machine in houses Hydro power energy The energy of flowing water is called hydropower energy. Nuclear energy Nuclear energy is being used in producing electricity, moving heavy machines, and it is used in nuclear bombs. Light energy Light energy is used in place of solar energy at night Some important terms Power rate of doing work is called power , when a man have done same work consuming less time then other, means he has power Pressure force per unit area is called pressure Work when a force applies or applied on an object and object moves in the direction of force is called work ......... |
The Following 2 Users Say Thank You to alihashmatkhoso For This Useful Post: | ||
memon bilal (Friday, August 17, 2012), NoorMBA (Monday, July 16, 2012) |
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