"Waves II "

Work through problems 32, 34, 46 & 50 from Knight, Ch. 21.

and

Write a sentence describing what is hardest about the 2^nd half of the chapter.

32: Two waves on a string travel in opposite directions at 100 m/s. The figure shows a snapshot graph of the string at t = 0, when the two pulses overlap, and another snapshop graph of the left-going pulse at t = 0.050 s. Draw a snapshot graph of the right-going pulse at t = 0.050 s.

34: A string vibrates at its third-harmonic frequency. The amplitude at a point 30 cm from one end is half the maximum amplitude. How long is the string?

46: The two strings are of equal length and are being driven at equal frequencies. The linear density of the left string is 2.0 g/m. What is the linear density of the right string?

50: The tube is filled with pure oxygen and the piston is driven at 400 Hz. What is the speed of sound in oxygen?

Jess H. Brewer - Last modified: Thu Sep 24 08:50:24 PDT 2009