SI Units - The International System of Units (SI) states the 7 base units that must be used in all calculations. These are: Second (time), Meter (distance), Kilogram (mass), Ampere (current), Kelvin (temperature), Mole (amount of a substance), and Candela (light intensity). All other units are derived from these 7.
Mean Mean is the type of average used in physics. A mean value of serval results should
always be found when analysing experiments.
Random - Random uncertainties are present in every experiment. This is the reason that experiments must be repeated.
Scale Reading - The scale reading is the uncertainty that accords because of the scale on the
device used. These are never completely precise.
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