Cannot give numerical factors this is its limitaon

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 10,000 •  3.141 592 65 Structure of MaUer •  MaUer is made up of molecules –  The smallest division that is iden;fiable as a substance •  Molecules are made up of atoms –  Correspond to elements More structure of maUer •  Atoms are made up of – Nucleus, very dense, contains •  Protons, posi;vely charged, “heavy” •  Neutrons, no charge, about same mass as protons –  Protons and neutrons are made up of quarks –  Orbited by •  Electrons, nega;vely charges, “light” –  Fundamental par;cle, no structure Structure of MaUer Clicker Ques;on Dimensional Analysis •  Technique to check the correctness of an equa;on •  Dimensions (length, mass, ;me, combina;ons) can be treated as algebraic quan;;es –  Add, subtract, mul;ply, divide •  Both sides of equa;on must have the same dimensions Examples: v=v+at 0 F=ma Dimensional Analysis, cont. •  Cannot give numerical factors: this is its limita;on •  Allows a check for calcula;ons which can show up in the units Examples in Class Uncertainty in Measurements •  There is uncertainty in every measurement, this uncertainty carries over through the calcula;ons –  Need a technique to account for this uncertainty •  We will use rules for significant figures to approximate the uncertainty in results of calcula;ons Significant Figures •  A significant figure is...
View Full Document

This document was uploaded on 01/14/2014.

Ask a homework question - tutors are online