Bird on the wire. A canary sits 10 m from the end of a 40 m long clothesline, and a grackle sits
5.0 m from the same end. You want to vibrate the opposite end of the line at a frequency such
that the grackle is dislodged at an antinode and the canary is undisturbed at a node of a standing
wave pattern. The tension in the line is 500 N, and the linear density of the line is 0.20 kg/m.
Consider this string to be fixed at both ends. Follow the sequence below to solve this problem.

1. Sketch the desired standing wave pattern and identify the harmonic (n number) of the desired vibration. Mark the locations of both birds.

2. Determine the speed of the wave on the clothesline.

3.Determine the frequency you need to vibrate the line with to achieve your goal: scare away the grackle and keep the canary.