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Online Physics Glossary
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Word Meaning Remarks
SI Internationally agreed -upon method of using the metric system of measurement.
Significant digit Reliable digits reported in a measurement.
Simple harmonic motion Motion caused by linear restoring that has a period independent of amplitude of motion.
Simple machine Machine consisting of only one lever, inclined plane, wedge, screw, pulley, or wheel and axle.
Sine The ratio of the opposite side and the hypotenuse.
Sliding friction Force between two surfaces in relative motion.
Slope Ratio of the vertical separation, or rise to the horizontal separation, or run.
Solid State of matter with fixed volume and shape.
Sound level Quantity measuring logarithm of sound intensity in decibels.
Spark chamber Device used to detect path of charged subatomic particles by a spark that jumps along path of ionization created in a gas.
Specific heat Thermal energy needs to change temperature of unit mass of substance one Kelvin.
Spectroscope Device used to study spectrum of material.
Spectrum Collection of wavelengths in electromagnetic spectrum.
Speed Ratio of distance traveled to time interval.
Speed of light In vacuum, 2.9979458 * 10^8 m/s.
 
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