For next class

Read up on the Doppler effect.  Play with the applets, if you wish:

http://falstad.com/ripple/

http://www.lon-capa.org/~mmp/applist/doppler/d.htm

And - some practice problems to try before the test (which will be the week after the upcoming short week.)

1.  B is 466.1 Hz, approximately.  Find the following frequencies:

a.  the next 2 octaves
b.  the 2 octaves below
c.  the C above (one semi-tone)
d.  the D above (3 semi-tones)

2.  Be able to conceptually/physically explain the Doppler effect.

3.  Consider a tube open on both ends, 0.4-m in length.  Find the relevant stuff for the first 3 harmonics:  wavelengths, frequencies, shapes.  How would answers change for the same tube capped on one end?

4.  Review the recent quiz and make sure you understand the string/harmonics stuff.

5.  Review the speed of sound lab in your notes.

Remember:  Proper prior preparation prevents poor performance.