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).