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The current theoretical model of the atom involves a dense nucleus surrounded by a probabilistic "cloud" of electrons. Atomic theory is the scientific theory that matter is composed of particles called atoms. The definition of the word "atom" has changed over the years in response to scientific discoveries.
Aristoteles. Salinan Romawi (dalam marmer) dari perunggu Yunani patung dada Aristoteles oleh Lysippos ( c. 330 SM ), dengan mantel pualam modern. Aristoteles ( bahasa Yunani: ‘Aριστοτέλης Aristotélēs ), ( 384 SM – 322 SM) adalah seorang filsuf Yunani yang menjadi guru dari Alexander Agung. [1]
Much of the best evidence of Democritus' theory of atomism is reported by Aristotle (384–322 BCE) in his discussions of Democritus' and Plato's contrasting views on the types of indivisibles composing the natural world.
Key concepts of Aristotelian physics include the structuring of the cosmos into concentric spheres, with the Earth at the centre and celestial spheres around it. The terrestrial sphere was made of four elements, namely earth, air, fire, and water, subject to change and decay.
Aristotelian physics is a correct and non-intuitive approximation of Newtonian physics in the suitable domain (motion in fluids), in the same technical sense in which Newton theory is an approximation of Einstein's theory.
Aug 23, 2005 · This powerful and consistent materialism was regarded by Aristotle as a chief competitor to teleological natural philosophy; following his criticisms, the theory was reformulated by Epicurus and had a second life as the philosophy of a school devoted to the pursuit of tranquillity and a communal life of simple pleasures.
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Aug 23, 2005 · Understanding, on the basis of the atomist theory, that our fears of the gods and of death are groundless will free us from our chief mental pains. Epicurus made significant changes to atomist physical theory, and some of these have been traced to Aristotle’s criticisms of Democritus.
