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2. Write down as explicitly as you can the time-independent, non-relativistic Schrodinger equation for the following systems: a system of 3 particles of mass M in field-free space lV=0) the BeH+ ion the HD diatomic molecule a hydrogen atom in an electric field, E. (Hint: Recall Stark Effect from your Physics course} [Hint First you need to figure out what constitutes the physical system, then, what are the variables with which to express its kinetic energy and its potential energy in terms of classical physics. Then use the corresponding quantum mechanical operators to replace the classical physics variables to get the operator for the total energy, the Hamiltonian. Then write down the Schrodinger equation in terms of these operators] ape-5