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Online Physics Glossary
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Word Meaning Remarks
Energy Non-material property capable of causing changes in matter.
Energy levels Amounts of energy an electron in an atom may have.
Entropy Measure of disorder in a system; ratio of heat added to temperature.
Equilibrant force Force needed to bring an object into transitional equilibrium.
Equilibrium Condition in which net force is equal to zero. Condition in which net torque on object is zero.
Equivalent resistance Single resistance that could replace several resistors.
Evaporation Change from liquid to vapor state.
Excited state Energy level of atom higher than ground state.
External forces Forces exerted from outside a system.
Extrinsic semiconductor Semiconductor in which conduction is primarily the result of added impurities.
Factor-label method Dimensional analysis.
Farad Unit of capacitance. One coulomb per volt.
Ferromagnetic materials Materials in which large internal magnetic fields are generated by cooperative action of electrons.
First harmonic In music, the fundamental frequency.
First law of thermodynamics Change in internal or thermal energy is equal to heat added and work done on system. Same as law of conservation of energy.
 
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