lec25 - Physics 140 Fall 2007 lecture #25: 4 Dec Ch 15...

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Physics 140 – Fall 2007 lecture #25: 4 Dec Ch 15 topics: Sec 1-4, 6-8 mechanical waves – transverse – longitudinal wave speed (taut string) wave superposition (addition) • standing waves, nodes, anti-nodes Note: 1) Guest lecturer this Thursday Prof. Dragan Huterer 2) No Help Room Office hours this Wed Cosmic Cartography meeting in Chicago midterm 3 score distribution
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Typical final overall score dist’n Score Letter grade 85-100% A 75-85% B 60-75% C 45-60% D <45% E Winter 2004 Current score dist’n (out of 80% total) NOTE: This is missing 20% from MaPhys current C/D border assuming 100% MaPhys score (on Sams) Scores to date / All Scores
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Final exam is next Friday, 14 Dec, 7:30–9:30pm Alternate: 4:00–6:00pm, send e-mail to phys140lecture@umich.edu to sign up bring: up to four 3x5 notecards or one 8.5x11 sheet, calculator, #2 pencils, student ID 22 questions – 12 on Ch 13–16 – 10 on Ch 1–12 practice final exam on CTools site Next Tuesday: Final Review (in lecture) 7, 8, 9, 25 Modern Lang Bldg Aud 4 10, 23, 24, 26, 27 Chem 1210 4, 5, 6, 11, 12, 13, 14, 15 Modern Lang Bldg Aud 3 Discussion Sections Midterm Exam Location Final exam Locations Friday, 14 Dec, 7:30–9:30pm
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All waves are oscillating disturbances that move through space over time. Some types of waves (electromagnetic and quantum waves of matter) can travel in a vacuum. Others, known as mechanical waves, (water waves, sound) require a medium that supports the disturbance.
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lec25 - Physics 140 Fall 2007 lecture #25: 4 Dec Ch 15...

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