If the surface height perturbation in a shallow water gravity wave is given by find the corresponding velocity perturbation "(x). sketch the phase relationship between h'and u' for an eastward propagating wave.

Why does the equilibrium position of the spring change when a mass is added to the spring? will the mass oscillate around the new equilibrium position of the spring or the previous position without a mass attached to the spring? if the equilibrium position of the spring changes by 20 cm (assuming no initial mass) when a mass is added to the spring with constant 4.9 kg/s^2, what is the mass of the object attached to the spring?