Ef
- Effective Address
- The final memory address used by an instruction.
- Effective Nuclear Charge
- The nuclear charge experienced by an electron when other electrons are shielding the nucleus.
- Effective Particle Density
- The mass of a particle divided by its volume
including open pores and closed pores.
- Effective Perceived Noise Level
- There are a number of different noise criteria measurements used by local authorities to determine noise levels in the community.
- Effective Radiated Power
- The product of the transmitter power in watts and the relative gain of a directional antenna as compared with a standard half-wave dipole.
- Effective Temperature
- An arbitrary index which combines into a single value the effect of temperature, humidity, and air movement on the sensation of warmth or cold felt by the human body.
- Effervescence
- The rapid escape of gas from a liquid, usually due to chemical action.
- Efficiency
- A measure of how well a machine changes energy into useful energy.
- Efflorescent
- Efflorescent substances lose water of crystallization to the air.
- Effusion
- Movement of gas molecules through a small opening.
- E-Field
- Abbreviation of Electric Field.