Physics - Wave on String Question with Solution | TestHub

A sonometer wire resonates with a given tuning fork forming standing waves with five antinodes between the two bridges when a mass of $9\mathrm{kg}$ is suspended from the wire. When this mass is replaced by a mass $\mathrm{M}$, the wire resonates with the same tuning fork forming three antinodes for the same positions of the bridges. The value of ' $M$ ' is