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(a) Discuss the 'two main modes of operation of an atomic force microscope (AFM). [6 marks)...
The potential energy of a diatomic molecule (a two-atom system like H, or 02) is given by А B E, (1) 76 where r is the separation of the two atoms of the molecule and A and B are positive constants. Eq. 1 is also known as Lennard-Jones potential. (a) Derive the force acting between the two atoms as a function of their distance r. [4 marks] (b) Find the system's equilibrium separation. [4 marks] (c) For a total mechanical...