Physics is one of the oldest scientific disciplines, studying matter, motion, energy and force. Physics intersects with other sciences and defines methodologies for other fields
Classical mechanics studies forces acting on bodies and particle motion. Thermodynamics examines energy transfer and temperature changes. Electromagnetism investigates electron behavior and light interactions
Comprehensive coverage of physics topics from mechanics to modern physics. Suitable for one- or two-semester undergraduate physics courses. Requires basic calculus knowledge but not advanced mathematics. Emphasizes fundamentals and problem-solving rather than rote memorization
Collection of 15 free PDF physics books covering fundamental concepts. Books provide comprehensive introduction to mechanics, thermodynamics, electromagnetism. Resources available for self-directed learning without registration
Physics describes interactions of energy, matter, space, and time. Nature exhibits underlying order and simplicity despite vast complexity. Physical laws explain seemingly unrelated phenomena through unified principles
Zero as placeholder was independently invented in various civilizations. Babylonians used double angled wedges to represent empty number columns. Mayans developed zero around A.D. 350 for calendar systems