Spring 2005
MWF 11:30
Instructor: Dr. Bruce Law, CW
327, Tel: 532-1618.
REVIEW QUESTIONS OF Home Work 15
R21.3. A high pitch
musical note has a higher frequency than a low pitched musical note.
EXCERISES OF Home Work 15
E21.7. If a vibrating spring is made shorter then
the wavelength is also shorter. Hence, the frequency = speed/wavelength (and
the pitch) is increased.
E21.8. From the diagram 90cm = 1.5wavelengths,
therefore,
wavelength = 90/1.5 = 60cm.
E21.18. Pitch
= frequency and, also, frequency = velocity/wavelength. The diagram on the
left, which has the smallest wavelength, has the highest frequency and
therefore the highest pitch.