And as in the Olympic Games it is not the most beautiful and the strongest that are crowned but those who compete (for it is some of these that are victorious), so those who act win, and rightly win, the noble and good things in life. For the state of mind may exist without producing any good result, as in a man who is asleep or in some other way quite inactive, but the activity cannot for one who has the activity will of necessity be acting, and acting well. But it makes, perhaps, no small difference whether we place the chief good in possession or in use, in state of mind or in activity. With those who identify happiness with virtue or some one virtue our account is in harmony for to virtue belongs virtuous activity. These are terms of ethical philosophy, not science. Aristotle argues that virtue stems from actions and not merely from existence.
In the Nicomachean Ethics, energeia was contrasted with hexis ( εξις), which meant to "possess" or "to be in the state of". Energeia literally means "in work" or "to contain work", en+ergon ( εν+εργον). Aristotle's sense of the word is often translated as "activity" or "being at work". Its contemporary meaning has diverged significantly from Aristotle's original meaning. Aristotle of Stagira (384–322 BCE) Greece: first use of the word energeia ( ενεργεια) in the Nicomachean Ethics.unitĪtomic and nuclear units Energy equivalents from atomic and nuclear physics Note:Īll values are exact by definition or calculation except for the atomic mass unit which is accurate to the number of digits displayed. ‡ Quad is the shortened form of "quadrillion Btu". † Btu is the abbreviation for "British thermal unit". Richard Feynman, 1965 (paid link) Energy units discussed in this book * The kilocalorie is also known as the kilogram calorie, dietetic calorie, food calorie, and Calorie (with an uppercase "C"). Largest nuclear bomb tested (Tsar Bomba, 1961)įor those who want some proof that physicists are human, the proof is is the idiocy of all the different units which they use for measuring energy. ⎡Īpproximate energy of selected events (smallest to largest) energy (J) Types of potential energy (classified by type of field) force fieldĮnglish brewer and scientist James Joule (1818–1889) who determined the mechanical equivalent of heat. potential energy - position or arrangement.Radio waves, microwaves, infrared, light, ultraviolet, x-rays, gamma rays Household current, AC and DC circuits, lightning, …ĭisturbance propagating through electric and magnetic fields (classical physics) or the motion of photons (modern physics) Random motion of microscopic particles of matter (molecules, atoms, ions)īulk flow of charges (electrons, protons, ions) Machines, muscles, projectiles, wind, flowing water, ocean waves, sound, … Types of kinetic energy (classified by type of object) type radio, microwaves, infrared, light, ultraviolet, x-rays, gamma rays.electromagnetic radiation - disturbance of electric and magnetic fields (classical physics) or the motion of photons (quantum physics).thermal energy - motion of particles of matter.mechanical energy - motion of macroscopic systems.Is kinetic energy "used up energy"? kinetic energy Energy can be stored in motion just as well as it can be stored in position. The energy associated with position is called potential energy. The energy associated with motion is called kinetic energy. All forms of energy are either kinetic or potential. abstract and cannot always be perceivedĮnergy can exist in many different forms.
A system possesses energy if it has the ability to do work.Įnergy is transferred or transformed whenever work is done.
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