Energy Flashcards
Conservation of energy
Energy cannot be created or destroyed, only transferred from one form to another.
Kinetic Energies
Energies of movement
KE, Thermal, Light, Sound
Potential Energies
Energies of position, shape or state
GPE, Electric, Elastical potential, Chemical, Nuclear
KE
Energy transferred by moving objects
KE = 1/2mv²
Joules
Thermal Energy
Energy transferred due to temperature differences
Joules (See sub-topic for more details)
Light Energy
Energy transferred by light waves
Sound Energy
Energy transferred by sound waves
GPE
Energy linked to the position of objects in a gravitational field
GPE = mgh
Joules
Elastic Potential Energy
Energy stored in a stretched or compressed spring or other elastic material
Electrical Energy
Energy linked to the position of charge in an electric field
Chemical Energy
Energy stored in chemical bonds
Released through chemical reactions
Nuclear Energy
Energy stored in the nucleus of an atom
Released through fission or fusion
Work Done
Work is done whenever energy is transferred.
Wd = Fd
Joules
Work Done
Work is done whenever energy is transferred.
Wd = Fd
Joules
Efficiency
% Efficiency = useful energy (or power) output/total energy (or power) output x 100
