sy02_sept10_07hc

sy02_sept10_07hc - Page 1 Physics 207 Lecture 2 Physics...

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Unformatted text preview: Page 1 Physics 207 Lecture 2 Physics 207: Lecture 2, Pg 1 Physics 207 Labsstart this week (MC1a & 1c) Physics 207: Lecture 2, Pg 2 Physics 207, Physics 207, Lecture 2, Sept. 10 Lecture 2, Sept. 10 Agenda for Today Agenda for Today c Finish Chapter 1, Chapter 2.1, 2.2 Finish Chapter 1, Chapter 2.1, 2.2 x Units and scales, order of magnitude calculations, significant Units and scales, order of magnitude calculations, significant digits (on your own for the most part) digits (on your own for the most part) x Position, Displacement Position, Displacement x Velocity (Average and Instantaneous), Speed Velocity (Average and Instantaneous), Speed x Acceleration Acceleration x Dimensional Analysis Dimensional Analysis Assignments: Assignments: c For next class: Finish reading Ch. 2, read Chapter 3 (Vectors) For next class: Finish reading Ch. 2, read Chapter 3 (Vectors) c Mastering Physics: HW1 Set Mastering Physics: HW1 Set due this Wednesday, 9/10 due this Wednesday, 9/10 c Mastering Physics: HW2 available soon, due Wednesday, 9/17 Mastering Physics: HW2 available soon, due Wednesday, 9/17 (Each assignment will contain, 10 to 11 problems (Each assignment will contain, 10 to 11 problems Physics 207: Lecture 2, Pg 3 Length Length Distance Distance Length (m) Length (m) Radius of Visible Universe 1 x 10 26 To Andromeda Galaxy 2 x 10 22 To nearest star 4 x 10 16 Earth to Sun 1.5 x 10 11 Radius of Earth 6.4 x 10 6 Sears Tower 4.5 x 10 2 Football Field 1 x 10 2 Tall person 2 x 10 Thickness of paper 1 x 10-4 Wavelength of blue light 4 x 10-7 Diameter of hydrogen atom 1 x 10-10 Diameter of proton 1 x 10-15 Physics 207: Lecture 2, Pg 4 Time Time Interval Interval Time (s) Time (s) Age of Universe 5 x 10 17 Age of Grand Canyon 3 x 10 14 Avg age of college student 6.3 x 10 8 One year 3.2 x 10 7 One hour 3.6 x 10 3 Light travel from Earth to Moon 1.3 x 10 One cycle of guitar A string 2 x 10-3 One cycle of FM radio wave 6 x 10-8 One cycle of visible light 1 x 10-15 Time for light to cross a proton 1 x 10-24 Physics 207: Lecture 2, Pg 5 Mass Mass Object Object Mass (kg) Mass (kg) Visible universe ~ 10 52 Milky Way galaxy 7 x 10 41 Sun 2 x 10 30 Earth 6 x 10 24 Boeing 747 4 x 10 5 Car 1 x 10 3 Student 7 x 10 1 Dust particle 1 x 10-9 Bacterium 1 x 10-15 Proton 2 x 10-27 Electron 9 x 10-31 Neutrino <1 x 10-36 Physics 207: Lecture 2, Pg 6 Some Prefixes for Power of Ten Some Prefixes for Power of Ten Power Power Prefix Prefix Abbreviation 10 3 kilo k 10 6 mega M 10 9 giga G 10 12 tera T 10 15 peta P 10 18 exa E 10-18 atto a 10-15 femto f 10-12 pico p 10-9 nano n 10-6 micro 10-3 milli m Page 2 Physics 207 Lecture 2 Physics 207: Lecture 2, Pg 7 Order of Magnitude Calculations / Estimates Order of Magnitude Calculations / Estimates Question: How many Question: How many french french fries, placed end to fries, placed end to end, would it take to reach the moon?...
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sy02_sept10_07hc - Page 1 Physics 207 Lecture 2 Physics...

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