Significant Figures
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Definition
The meaningful digits in a number that contribute to its measurement precision.
Explanation
Rules: non-zero digits are always significant; zeros between non-zero digits are significant; trailing zeros after a decimal point are significant.
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A numerical multiplier used to convert a quantity from one unit to another.
Precision
The degree of refinement in a measurement, indicated by the number of significant digits.
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How close a measurement is to the true value of the quantity being measured.
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