11/20/09
Post date: Nov 20, 2009 2:48:41 PM
Bell Ringer: What is efficiency?
Notes on efficiency
Ratio of how much energy gets to the form we want it in
Usually expressed as a percent
Notes on Energy flow diagrams
Visual way to show the path of energy
Diagrams ALWAYS branch out because there are no 100% efficient processes
Diagrams can almost always be traced back to energy from the sun
Examples: Ball on loop-the-loop, computer
District Assessment: Kinetic Energy
Homework: Make an energy flow diagram for Tom Hanks making fire in the the movie "Cast Away"