Energy Transfers

Mechanisms of Energy Transfer

Category Illustration Description Microstory Equations Questions/Links
Work Transfer of kinetic energy by a force exerted over a distance Requires macroscopic motion of the locus of the force interaction Do stairs do work on you when you run up them?
Conduction Transfer of thermal energy through a material Mediated by uncoordinated microscopic motion/vibration of atoms /molecules  
Convection Transfer of thermal energy through fluid motion Coordinated motion of fluid particle in response to temperature/density differences    
Radiation Transfer of radiation energy by electromagnetic waves Oscillating electric and magnetic fields can also be treated as individual packets of energy called photons  

Matter Waves

Transfer of energy by matter waves Coordinated oscillation of particles    

Matter Transfer

Transfer of energy by transfer of matter Coordinate transfer of particles    

Electrical Transfer

Transfer of energy by electrical current Coordinated movement of electrical charges    

References:

Energy and the Confused Student I: Work, J. Jewett, The Physics Teacher 46, 38 (2008).

Energy and the Confused Student IV: A Global Approach to Energy, The Physics Teacher 46, 210 (2008).

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