physics.004 - to A-PDF Split DEMO : Purchase CHAPfER I '...

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to CHAPfER I' ,Plwsical Quamitie$, and Vectors In this form. it is clear dlat we have three significant figures. The number 4.00 X 10- 1 also has three significant figures, even though two of them are zeros. Notethat in scientilfic Rotation the usual practice is to express the quantity as 81 number between 1and 10 multiplied by the appropriatepowerof 10. When an integer or a fraction occurs a general equation. we treat that number as having no UBOertai.nty at aU. Per example, the eqnatimt V",2 = vu. 2 + 2a",,(x - X'n). which is Eg. (2. 3):in Chapter 2. the coefficient 2 is exactly 2. We can consider this ooefficient ashaving an infinite number ofsignif- iclDlt tlgures (2000000 •.. ). The same is true oftheexponent 2 v; and vol. Fmally, let's note rhat ,redSioll not e same as accmocy. A cheap digital watchthatgives the time as 10:35:17 A.M. is very precise (the time is given 10 the second). but if the watch runs several minutes slow. th.en value i811't very accurate.
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physics.004 - to A-PDF Split DEMO : Purchase CHAPfER I '...

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