P113 - Problem set #12

Waves, music, sound:

19-21

20-5, 20-8, 20-11, 20-17, 10-19, 20-38, 20-43

21-8, 21-12, 21-14, 21-26 (for MD's to be), 21-27 (similar to 21-26 … but more interesting for NROTC types)