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Lecture: 12   Chapter 3-4 (iq09)

1.    A comparison between the strong force and the electric force

2.    Center of mass of many-body system

3.    Momentum principle applied to a center of mass point

4.    Conservation of momentum in a collision.

5.    First few sections in chapter 4

o   Most important scientific knowledge in a few words -- Feynman

o   Ball-spring model for a solid

o   A simplified cubic arrangement: length of inter-atomic bound