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+PHYSICS BASICS - Core Concepts and Principles
+
+CLASSICAL MECHANICS
+==================
+
+Newton's Laws of Motion:
+1. An object at rest stays at rest, and an object in motion stays in motion with the same speed and direction unless acted upon by an unbalanced force. (Inertia)
+
+2. Force equals mass times acceleration (F = ma)
+
+3. For every action, there is an equal and opposite reaction.
+
+Key Equations:
+- Distance: d = vt (constant velocity)
+- Velocity: v = v0 + at (constant acceleration)
+- Distance with acceleration: d = v0t + (1/2)at²
+- Momentum: p = mv
+- Kinetic Energy: KE = (1/2)mv²
+- Potential Energy: PE = mgh
+
+ELECTRICITY AND MAGNETISM
+=========================
+
+Basic Concepts:
+- Charge: Fundamental property of matter (positive/negative)
+- Electric field: Force per unit charge
+- Current: Rate of charge flow (I = Q/t)
+- Voltage: Electric potential difference (V = IR)
+- Resistance: Opposition to current flow
+
+Key Equations:
+- Ohm's Law: V = IR
+- Power: P = IV = I²R = V²/R
+- Energy: E = Pt = VIt
+
+THERMODYNAMICS
+=============
+
+Laws of Thermodynamics:
+1. Energy conservation - energy cannot be created or destroyed
+2. Entropy always increases in isolated systems
+3. Absolute zero is unattainable
+4. Entropy and temperature relationship
+
+Key Concepts:
+- Heat transfer: Conduction, convection, radiation
+- Specific heat capacity: Energy required to change temperature
+- Phase changes: Melting, freezing, boiling, condensation
+- Ideal gas law: PV = nRT
+
+QUANTUM PHYSICS
+==============
+
+Core Principles:
+- Wave-particle duality: Particles can exhibit wave-like behavior
+- Uncertainty principle: Cannot know both position and momentum precisely
+- Quantization: Energy levels are discrete, not continuous
+- Superposition: Quantum systems can exist in multiple states
+
+Key Equations:
+- Energy of photon: E = hf (h = Planck's constant)
+- de Broglie wavelength: λ = h/p
+- Heisenberg uncertainty: ΔxΔp ≥ h/4π
+
+MODERN PHYSICS
+=============
+
+Special Relativity:
+- Speed of light is constant for all observers
+- Time dilation: Moving clocks run slower
+- Length contraction: Moving objects appear shorter
+- Mass-energy equivalence: E = mc²
+
+General Relativity:
+- Gravity as curvature of spacetime
+- Equivalence principle: Gravitational and inertial mass are identical
+- Black holes and gravitational waves
+
+PRACTICAL APPLICATIONS
+====================
+
+Real-world Physics:
+- Engineering: Bridges, buildings, vehicles
+- Medicine: Imaging, radiation therapy, medical devices
+- Technology: Computers, smartphones, satellites
+- Energy: Solar panels, wind turbines, nuclear power
+
+Measurement Units:
+- Length: meter (m)
+- Mass: kilogram (kg)
+- Time: second (s)
+- Force: newton (N) = kg·m/s²
+- Energy: joule (J) = N·m
+- Power: watt (W) = J/s