The rope line one length 5 m with the rest mass, 1.45 g level. This path must be the rope tension, so as to make the 120 Hz frequency that occur on a rope with a wavelength equal to 0.4 m.
5 meters long rope with 1.45 grams of mass placed horizontally. This rope has to be much tension. It will make the 120 Hz frequency is happening on the ropes with a wavelength of 0.4 meters.
A rope long 5 meters, the mass 1.45 g posing in the horizontal plane. This string will have how much tension, so that the frequency 120 Hz. Happened on a string of wavelength of 0.4 meters.