atomictheoryv2

atomictheoryv2 - Atomic Theory Question of the Day • What...

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Unformatted text preview: Atomic Theory Question of the Day • What is energy? • What is the relationship of Kinetic Molecular Theory and atoms? • How does light express the atomic structure? Before Atomic Theory James P. Joule • 1818 - 1889 • Born to a brewery family in Salford, Lanchsire, England • Studied at home and published many papers on heat transfer • Became the head of the Joule Brewery • Combined the effort many scientists to create Kinectic Theory Wikipedia: http://en.wikipedia.org/wikiJames_Prescott_Joule/ Energy • First, What is Work? – A force through the distance. – W = F*d – Units of Work • 1 unit of work = 1 N * 1m • 1 kg m 2 /s 2 = 1 Joule • Power – 1 unit of power = 1 Work / time • 1 Joule/ Second = 1 Watt Power • Power is a unit of energy over time. • Like water flowing out of a pipe. • Power: 1Watt Seconds Joules Power T E Time Energy P = = = = Kinetic Energy 2 2 2 2 2 2 2 2 2 2 2 2 1 2 1 2 1 2 1 2 1 m v W t t v m W t m a W a t m a W t v a t v a a t d m a F F d W = = = = = = = = = Potential Energy m g h W g a m a F h d F d W = = = = = Kinetic Energy of Car • The car from last lecture is moving at 30 m/s. What is the kinetic energy of the car? J s k g m W s m k g W m v W s m v k g m 0 0 0 , 9 0 / 0 0 0 , 9 0 ) / 3 0 ) ( 0 0 0 , 2 ( 2 1 2 1 / 3 0 0 0 0 , 2 2 2 2 2 = = = = = = Kinetic Energy of a Plane • The plane from the last lecture is going at 65 m/s. What is the kinetic energy of the plane? Potential Energy of a Car • What is the potential energy of the above car when it is on a hill of 300 m? J W s k g m W m s m k g W m g h W m h k g m 0 0 0 , 8 8 0 , 5 / 0 0 0 , 8 8 0 , 5 ) 3 0 0 ) ( / 8 . 9 ) ( 0 0 0 , 2 ( 3 0 0 0 0 0 , 2 2 2 2 = = = = = = Potential Energy of a Plane • The above plane is traveling at an altitude of 2,000 m above ground level. What is the potential energy of the plane? Conservation of Energy • “Energy is never created or destroyed. Energy can be converted to one form to another but the total energy remains the same.” • Work against: – Inertia: conserved – Gravity: conserved – Friction: not conserved, heat released – Shape: not conserved, heat transferred Kinetic Molecular Theory • Democritus (5 th Century B.C.) – Introduced atoms – Rejected by Arstotle • Elements represented by earth,wind,fire, and air – Galileo and Newton suggested he might be right, but not confirmed – Kinetic Molecular Theory KMT (cont.) • Molecules – Made of atoms – Compounds like H 2 – Smallest compound components...
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This note was uploaded on 12/04/2011 for the course AST 1004 taught by Professor Howard during the Fall '09 term at Broward College.

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atomictheoryv2 - Atomic Theory Question of the Day • What...

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