5 - Natural Science Lecture 2/5/2008 1:01:00 PM Physics of...

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Natural Science Lecture 05/02/2008 13:01:00 Physics of Aristotle (300s BC) Terrestrial realm – Natural motion was vertical motion ( up or down).  Terrestrial objects are made of 4 elements: Earth, Water , Air, Fire.  (go from  the center outward). Fire rises because the sphere of fire rises up above air.   Celestial realm – Natural motion was uniform circular motion.  Celestial  objects are made of aether (quintessence).  Moon on outwards. Terrestrial Realm o Each elements natural motion is to return to its natural sphere (up or  down). o An object also may move due to forced motion (violent motion) e.g. a  push or pull.  o After a force stopped, the object would come to rest. Speed (S) of an  object is inversely proportional to the resistance  (R) of medium  through which it moves. S-> 1/R Galileo Galilei Galileo Galilei and the Telescope: o
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This note was uploaded on 04/13/2008 for the course CGS 101 taught by Professor Baublitz during the Spring '08 term at BU.

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5 - Natural Science Lecture 2/5/2008 1:01:00 PM Physics of...

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