The photoelectric threshold wavelength for silver is \($\lambda_{0}$\) The energy of the electron ejected from the surface of silver by an incident wavelength \(\lambda (\lambda <\lambda _0)\)
A system consists of three particles, each of mass \(m\) and located at \((1,1),(2,2)\) and \((3,3)\). The co-ordinates of the center of mass are :