Physics 1. Chapter-1-questions-and-problems 2. chapter-2-molecular-physics-and-thermodynamics 3. chapter-3-electrostatics 4. chapter-4-direct-current 5. chapter-5-electromagnetism 6. chapter-6-oscillatory-motion-and-waves 7. chapter-7-alternating-current 8. chapter-8-optics 9. chapter-9-atomic-and-nuclear-physics