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).