1. The problem statement, all variables and given/known data A brass tube of mass 23 kg and length 1.5 m is closed at one end. A wire of mass 9.9 g and length 0.39 meters is stretched near the open end of the tube. When the wire is plucked, it oscillates at its fundamental frequency. By resonance, it sets the air column in the tube oscillating at the column's fundamental frequency. a) What is the frequency of oscillation of the air in the tube? b) What is the tension in the wire? 2. Relevant equations f=nv/4L 3. The attempt at a solution I've been pretty much stuck on this one. When I asked my teacher, she wrote: "A plucked wire in part (A) will oscillate at it's fundamental frequency. In f=nv/4L, you know v is the speed of sound in air, n=1, and they give you L. Plug n chug to get f." I tried this and it didn't work, my answer was 219.8717Hz. And I plugging something in wrong?