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Physics

Vocab words, key formulas

FrontBack
Absolute zero The lowest theoretical temperature a material can have, where the molecules that make up the material hae no kinetic energy. Absollute zero is reached at 0K or -273C
Acceleration A vector quantity defined as the rate of change of the velocity vector with time
Activity In radioactive substances, the number of nuclei that decay per second. Activity, A, will be larger in large samples of radioactive material, since there will be more nuclei.
Alpha Decay A form of radioactive decay where a heavy element emits an alpha particle and some energy, thus transforming into a lighter, more stable, element.
Alpha Particle A particle, a, which constits of two protons and two neutrons. It is identical to the nucleus of a helium atom and is ejected by heavy particles undergoing alpha decay
Amplitude Measures the amount of energy a system has
Angle of incidence When a light ray strikes a surface, the angle of incidence is the angle between the incident ray and the normal.
Angle of reflection the angle between a reflected ray and the normal
Angle of refraction the angle between and refracted ray and the line normal to the surface
Angular acceleration A vector quantity, a, equal to the rate of change of the angular velocity vector with time. It is tipically given in units of rad/s squared
Angular displacement The net change, (-), in a poin't angular position, (/). It is a scalar quantity
Created by: kk2010 on 2007-08-09



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