PHYSICS 1L03- Final Exam Guide - Comprehensive Notes for the exam ( 28 pages long!)
29 Mar 2018
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Document Summary
To compare numbers we need accuracy with which the numbers were stated. Amount of uncertainty in values is conveyed by number of digits (significant figures) used to describe the value: measurements must fall within uncertainty of prediction. If there"s a decimal after trailing digits they"re sig figs. Multiplying/dividing numbers: result has same number of sig figs as least accurate number used in calculation. Adding/subtracting numbers: result has same precision as least precise number used in calculation. Scientific notation: a x 10^b, decimal system that allows us to carry many extra zeros, number of digits used communicates how reliable measurement is, eliminates trailing zeros. Order of magnitude of a number: power of 10 of a number, to divide subtract exponents, to multiply add exponents. Most commonly used measurement system is si (international system of units) 1 pound of force = 4. 45 newtons. Si base units (table 1. 1 pg 9) Si named units (table 1. 2 pg 9)
