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Spring 2008  Phys 5A  4/30  Lecture 2.18  50 minutes
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"I did never know so full a voice issue from so empty a heart: 
but the saying is true, 'The empty vessel makes the greatest sound.'"
--William Shakespeare

"As empty vessels make the loudest sound, so they that have least with 
are the greatest babblers."
--Plato

TODAY (*.pdf)
Clicker homework

Pick up your Quiz 6; scores posted online
Discussion of selected questions at waiferx.blogspot.com

4/28 opinion results
     Preparation/understanding of material?

Ch. 12.4: Standing Sound Waves
     Ex: Trumpet Standing Sound Waves
         (Steve Erickson, Lawsuit, Davis, CA)
     Ex: Problem 12.20 (extended, conceptual) 
Ch. 12.8: The Doppler Effect
     Ex: Doppler Effect
         (Delsea Regional High School, Franklinville, NJ) 
     Ex: Multiple-Choice Question 12.8 (extended)
     
NEXT TIME
"Homework" (for practice only; Midterm 2 preparation)
           (emphasis on conceptual understanding/dependencies)
     Multiple-Choice Question 12.9 
     Problems 12.21 (does f_1 increase/remain same/decrease?)
              12.39 (observer hears higher/same/lower than 1.0 kHz?)
              12.41 (observer hears higher/same/lower than 1.0 kHz?)

Read Chs. 13.1 (heat, equilibrium, Zeroth Law)
          13.2 (Eq. (13-3), Celsius/Kelvin conversion only)
          13.3 (Fig. 13.3; Eqs. (13-4), (13-5))
          13.4 (moles, Avogadro's number, atomic mass unit "u",
                molar mass, p. 461 "light bulb" comment)