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Spring 2008  Phys 5A  4/25  Lecture 2.16  50 minutes
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"The musician who always plays on the same string 
is laughed at." 
--Horace

TODAY (*.pdf)
Clicker homework

Ch. 11.10: Standing Waves
     Ex: Standing Waves on Strings
          (mu = 40 g/m, tension F = 2.0 N)
          (ActivPhysics, Pearson Publishing)
     Ex: Problem 11.56 (conceptual)
     Ex: Conceptual Questions 11.3, 11.4, 11.6, Problem 11.52 (extended)
     Ex: GuitarBot, by League of Electronic Musical 
         Urban Robots (LEMUR) (YouTube.com, NYTimes.com)
     
NEXT TIME
Quiz 6 Announcements
     MONDAY, 4/28, 9:30-9:55 AM
     Closed-book, closed-notes
     Ten multiple-choice questions
          (Adapted from Chs. 10-11 problems listed in reading guide;
           of which five will be conceptual/definitions)
          (Ch. 10.2: one problem)
          (Chs. 10.5-10.6: two problems)
          (Ch. 10.7: one problem)
          (Ch. 10.8: one problem)
          (Chs. 11.3-11.4: two problems)
          (Ch. 11.10: three problems)
     No work needs to be shown; no partial credit
     No Scantrons; circle answers directly on Quiz
     Bring your scientific calculator
     **USE YOUR OWN UNIQUE 4-DIGIT P.I.N.**
     **SHM/WAVE EQUATIONS PROVIDED ON QUIZ**
     **KNOW WHEN/HOW TO APPLY EQUATIONS**

Homework
Read Chs. 11.1 (intensity: Fig. 11.2, Eq. (11-1))
          12.1 (skim)
          12.2 (Eq. (12-3): T dependence of sound wave v)
          12.3 (threshold of hearing, sound intensity, sound level, 
                Eq. (12-8), p. 422 "!" comment)

NEXT NEXT TIME (Wednesday, 4/30)
     Problems 11.47 (for practice only)
              11.48
              11.52(a)-(b); (c) find _wavelength_ of sound waves
              11.53 (for practice only)
              11.54 (convert mg to kg first!)
              11.55 (for practice only)
              11.57 (for practice only)