Energy: What it IS, what it is NOT, and How we know
© Walter Scheider 2003
#00 Title
 Models that represent "Energy" #01 PE-gravitation, falling object to table #02a rolling push - no friction #02b sliding push - with friction #03 PE-gravitation, falling object to table #04 Energy scheme What is behind the energy scheme? #05a "skeleton" of the derivation of Work-Energy Theorem #05b Work-Energy Theorem The Frames of reference problem #06a PE-gravitation, falling object to table #06b PE-gravitation falling object to floor #06c PE-grav falling object to table//to floor Nature's deafening silence about velocity #11 Meredith 01 - on the ground #11a Meredith 01-steps - timed work #12 Meredith 02 - on the stationary bus #13 Meredith 03 - moving bus, observer on the bus #14 Meredith 04 - moving bus, observer on the ground Energy is not substance-like - The failure of flow to track #15 splitting rocket 01 - observer in initial rocket frame #16 splitting rocket 02 - observer on earth Do measurements in any particular frame of reference have meaning? #17 Meaning of measurements: two points in a plane -- axes                           Conservation of Energy                           #21 Work-Energy Theorem to Conservation Law, algebra                           #22 WE-theorem                           #23 reprise -- axes Applications #31 rollercoaster Who does the work? #32 propulsion -- model #33 propulsion -- car -- tire Are there different kinds of energy? Where does energy come from? Bonds #41 Energy scheme #42 Forces of attraction: Bonds00 #43 hydroelectric power #44 Chemical bonds - fuel (carbon + oxygen) Is nuclear energy exempt from the Work-Energy principle? #45 What DOESN'T happen in uranium fission #46 nuclear bond energy graph #47 What DOES happen in uranium fission Where does chemical (and all other) bond energy come from? #48 forces and energy in ionic bonds #49 forces and energy in charged cookie sheets Activation #51 activation in 4-cycle internal combustion engine #52 schematic of ener-barrier #53 random energy to lift domino over energy barrier Chemistry -- energy barriers, systems going toward equilibrium #54 dice02 -- 4 aces rolled #55 dice03 -- 4 aces loaded dice #56 dice04 -- 4 three's loaded dice #56 going to equilibrium - exothermic reactions #57 going to equilibrium - endothermic reactions miscellaneous teaching movies #61steam cycle #62how does the table know how hard to push up to support a winebottle