一、质点的角动量定理和角动量守恒定律 (The angular momentum theorem & The law of angular momentum conservation of a mass point) 1 质点的角动量(The angular momentum of a mass point) 质量为m的质点以速度v在空间运动，某时刻相对原点O 的位矢为r，质点相对于原点的角动量
7-5 Conservation of momentum in a system of particles 7-4 Center of mass of solid objects 7-3 Many-particle system 7-2 Two-particle system 7-1 The motion of a complex object
26.1 Some important discoveries at the end of the 20th century a. Measured the charge of the cathode rays; b. Make a static electric deflection of the cathode rays; . Measured the charge to mass ratio of the cathode rays;
Electric Fields 918.1 Conductors in electric field 1. Conductors A conductor is a material in which the electrons at the outer periphery of an atom have no great affinity for any particular individual
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
