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Online Physics Glossary
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Word Meaning Remarks
Plasma State of matter in which atoms are separated into electrons and positive ions or bare nuclei.
Point object Object idealized as so small to be located at only one position.
Polarized light Light in which electric fields are all in same plane.
Position Separation between object and a reference point.
Position- time graph Graph of objectís motion that shows how its position depends on clock reading, or time.
Positron Antiparticle equivalent of electron.
Potential difference Difference in electric potential between two points.
Potential energy Energy of object due to its position or state.
Potentiometer Electrical device with variable resistance; rheostat.
Power Rate of doing work; rate of energy conversion.
Precision Degree of exactness in a measurement.
Pressure Force per unit area.
Primary coil Transformer coil that, when connected to voltage source, creates varying magnetic flux.
Primary light colors Red, green, or blue light.
Primary pigment Yellow, green, or magenta light.
 
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