{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Phys205A_Lecture2

Physics for Scientists & Engineers with Modern Physics (4th Edition)

Info icon This preview shows pages 1–15. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture 2 Measuremetns, Standards & Units Measurements are the major tool to get new knowledge and test the current (or newly proposed) theory Measurements deal with physical quantities and thus require unified and well defined standards for this quantities. z Characteristics of standards for measurements z Readily accessible z Possess some property that can be measured reliably z Must yield the same results when used by anyone anywhere z Cannot change with time
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Why it is important?
Image of page 2
Standards of Fundamental Quantities z Standardized systems z Agreed upon by some authority, usually a governmental body z SI – Systéme International z Agreed to in 1960 by an international committee z Main system used in this text Gaithersburg, MD Boulder, CO
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon