physics_chapter1notes

physics_chapter1notes - Chapter 1: Units, Physical...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 1: Units, Physical Quantities, and Vectors 1.3 Standards and Units Unit Prefixes 1.5 Uncertainty and Significant Figures Uncertainty/error – the maximum difference there is likely to be between the measured value and the true value Accuracy – how close a measured value is likely to be to the true value Precision – the quality of being reproducible in amount or performance Fractional/percent error – a measurement of how far off a value is from the accepted value Significant figures – number of meaningful digits in a measured value 1.6 Estimates and Orders of Magnitude Order-of-magnitude estimate – an estimate rounded to the nearest power of ten things that differ by a factor of ten are said to differ by one order of magnitude Page | 1
Background image of page 1

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

View Full DocumentRight Arrow Icon
1.7 Vectors and Vector Addition Scalar quantity – a quantity that has magnitude but not direction Vector quantity – has both a magnitude and a direction in space o magnitude – the measure or size of something always positive o displacement – a change in position of a point (vector quantity) parallel – two vectors that have the same direction negative of a vector – a vector having the same magnitude as the original vector but the
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/26/2011 for the course PHY 210 taught by Professor Mcdemus during the Spring '11 term at Lehigh Carbon CC.

Page1 / 5

physics_chapter1notes - Chapter 1: Units, Physical...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online