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 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