Todays class Mr. Doktor started by telling the class about some really interesting news about: Scientist breaking the speed of light in Genova, a finding that could overturn one of Einstein's fundamental laws of the universe. Measurements taken over three years showed neutrinos pumped from CERN near Geneva to Gran Sasso in Italy had arrived 60 nanoseconds quicker than light would have done.
We then had a lesson on Significant Digits & Scientific Notation, and Mr. Doktor gave us a worksheet to practice and review.
- All #'s from 1-9 are significant
- When we add/subtract two #'s we determine the number of significant digits by lining up the numbers and then rounding the decimal.
- When we multiply/divide two #'s we determine the # of significant digits by rounding to the #.
Coverting/Expanding
250,000,000 = 2.5x10^8
2.57x10^4 = 257,000
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