Uncertainty with Measurements and Working with numbers -...

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1-5/1-6: UNCERTAINTY OF MEASUREMENT & WORKING WITH NUMBERS
Uncertainty: 1) Measuring instruments are never completely free of flaws. 2) Measuring always involves estimation. Measure to the nearest increment OR 1/2 the smallest increment. Reliability: precision-- gives the same result over and over accuracy-- tests how close the value is to a standard
Significant Digits Significant digits: the valid digits in a measurement Zeros!!! Nonzero integers are always significant. All final zeros afterthe decimal point are significant as long as there is a nonzero number to the left of them. Zeros between two other significant digits are always significant. Zeros used solely as place holders are not significant.
Arithmetic with Significant Digits Adding/Subtracting: -perform the operation, and then round off
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Term
Fall
Professor
WillDible