The speed of sound Sound waves are longitudinal mechanical waves that can travel through solids, liquids, or gases. The speed of a sound wave in medium(having bulk modulus(容变弹性模量)and density p) is:

Chapter 13 &14 Wave Motion and Sound 1. Simple Harmonic Waves 2. Wave Equation 3. Energy and Power of Waves Interference of Waves Standing Waves 1. The Doppler Effect

Chapter 26 Sources of Magnetic Field 1. Biot-savart's law 2. Magnetic Flux and Gauss'Law 3 Amperes Law 4. Magnetic Materials

Chapter 25 Magnetism 1. Magnet and Magnetic Field 2. Definition of Magnetic Field 3. Force on an Electric Charge Moving in a Magnetic Field 4. Torque on a Current Loop

Chapter 27 Electro-Magnetic Induction and Faraday's Law 1. The Law of Electro-Magnetic Induction 2. Motional Induced Emf

Chapter 28 Inductance and Electromagnetic Oscillations 1. Self and Mutual Induction 2. Energy Stored in a Magnetic Field

Chapter 27 Electromagnetic Induction and Faraday's Law 1. The Law of Electromagnetic Induction (电磁感应定律) 2. Motional Induced EMF (动生和感生电动势)

Chapter 33 Early Quantum Theory and Models of the Atom 1. Planck's Quantum Hypothesis 2. The Photoelectric Effect 3. Compton Effect 4. Wave Nature of Matter

Chapter 29 Maxwell's Equations and Electromagnetic Waves 1. Displacement Current Ampere-Max' Law 2. Maxwell's Equation 3. Electromagnetic Waves

Chapter 10 11 Rotational Motion About Fixed Axis Torque, Rotational Inertia and Law Work and Rotational Kinetic Energy Angular Momentum and Conservation of Angular Momentum