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Energy

From The SAGE Glossary of the Social and Behavioral Sciences
A system's capacity to do work. While energy is not visible, it is essential to all daily activities and takes on several different forms. The two main forms are known as kinetic and potential energy. Kinetic energy, sometimes referred to as movable energy, refers to the energy a moving object has from its motion. Some of the common known forms of kinetic energy include electrical and thermal energy and sound. Potential energy is energy that is stored in an object. Its name is derived from its ability to change into other forms of energy. Common types of potential energy include chemical and nuclear energy. The two primary sources of energy are renewable and nonrenewable sources. Renewable sources, such as solar energy, are easily replenished, whereas nonrenewable sources, such as petroleum, are limited. These two sources of energy are converted to provide essential secondary sources of energy. The supply and use of both chemical energy and nuclear energy are politically contentious in…
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From The Penguin Dictionary of Physics
Symbol: E . The quantity that is the measure of the capacity of a body or a system for doing WORK . When a body does work, W , its energy decreases by an amount equal to W . The energy of the body upon which it does work increases by exactly the same amount so the total energy of the system does not…
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From Philip's Encyclopedia
In physics, capacity for doing work . It is measured in joules (J). Power , the rate at which energy is produced or consumed, is measured in watts (W). Potential energy is an object's ability to do work because of a change in the object's position or shape. Kinetic energy is the energy an object has…
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From Astronomy Encyclopedia
Ability of a body to do work (that is, to induce changes to itself or to other bodies). The unit for energy is the joule (J), defined as the work done by a force of one newton moving through a distance of one metre. Energy takes many forms: the energy stored by a body by virtue of its position, …
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From The Penguin Dictionary of Mathematics
Symbol: E . A measure of the capacity of a body or system to do work , i.e. to change the state of another body or system. Energy is measured in joules. Anybody or system that is subject to a conservative force , such as gravitation, has two forms of energy: kinetic energy due to its motion and…
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Full text Article ENERGY

From The Essentials of Philosophy and Ethics
Although nowadays scarcely mentioned in philosophy, energy has a central role to play in the understanding of the universe. And the notion that energy can be measured by linking matter and motion can be found as early as ARISTOTLE . Not until the seventeenth century were philosophers of nature ready…
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From International Encyclopedia of Human Geography
Percentage of gross electricity...
© 2020 Elsevier Ltd. All rights reserved. Glossary Energy landscape A landscape whose physical, functional, and symbolic characteristics have been significantly altered by energy developments and infrastructures Energy poverty A situation in which a person or household is unable to attain energy…
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From Encyclopedia of World Trade: From Ancient Times to the Present Full text Article A-Z Entries
New and existing energy technologies have been catalysts of change in global trade since the Industrial Revolution. Since the advent of the steam engine and the Industrial Revolution, energy technologies and the search for new fuel sources to generate energy have been one of the catalysts of changes…
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From Dictionary of Energy
In the mechanical sense, energy is the ability to do work where work is the action of a force acting on an object undergoing a displacement. Matter in motion is said to have kinetic energy because of its ability to change the motion of another object. Matter in a favorable position, such as water…
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From QFinance: The Ultimate Resource
Energy is the lifeblood of any economy, and global demand for energy has risen inexorably in the last 150 years in step with industrial development and population growth. Most global energy needs are supplied by coal, oil, and gas—the “fossil fuels” that formed long ago from the carbon-rich remains…
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From Gaither's Dictionary of Scientific Quotations
English physicist and chemist Should the research worker of the future discover some means of releasing this [atomic] energy in a form which could be employed, the human race will have at its command powers beyond the dreams of science fiction; but the remote possibility must always be considered…
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