SIGNIFICANT DIGITS.

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Significant Figures -why we use them -rules for sig. figs. -operations with sig. figs.

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Presentation transcript:

SIGNIFICANT DIGITS

SIGNIFICANT DIGITS The certainty of any measurement is communicated by the number of significant digits in its measurement. In a measured value, they are the digits that are known for certain and include the last digit that is estimated or uncertain.

THE RULES: 1. Non-zero digits are always significant. 23.8 2. Zeros at the beginning are never significant. 0.25

THE RULES: 3. Zeros between non-zeros are always significant. 5006 4. Zeros at the end of an integer are USUALLY not significant. 2500

THE RULES: 5. Zeros after a decimal and behind a non- zero are significant. 0.250

HOMEWORK: