This preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
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...
View
Full
Document
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.
 Fall '09
 Howard
 Galaxies

Click to edit the document details