3. A large rock of mass 01 kg and density 3000 kg/m is suspended from the lower end of a thin wire of length 2.0 m. The mass of the wire is small enough that its effect on the sin(100 tension in the wire can be neglected. The upper end of the wire is fixed. When the rock is in the air, the fundamental frequency for transverse standing waves on the wire is f. When the rock is totally submerged in water (density 1000 kg/m3) with the top of the rock just below the surface, what is the fundamental frequency for the wire in terms of f? [4] (Useful formulae: y(x, t) = A cos(kx + wt + (); v = (F / M) TT TPA V = V 2m