SIGNIFICANT FIGURES:

UNIT 1 - LECTURE 1: SIGNIFICANT FIGURES 1-01

All the digits in a measurement that are known for sure plus one more that is uncertain.

Interpreting Significant Figures:

a. Rules

1. All non-zero digits count

3.73 (3 sf) 3.7381 (5 sf) 3.73498672 (9 sf)

2. Zeros

a) Sandwiched

109 (3 sf) 1.09 (3 sf) 100,009 (6 sf) 10.909 (5 sf)

b) Initial (in #’s ................
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