20.1 The magnetic field and its application 1. The magnetic field and its features Gravitational field FG=mg -gravitational force caused by mass Electric field =gE -electric force caused by electric charge Magnetic field--? While the magnetic field has similarities to the other fields, it also has some unique features that distinguish it from the others

1 Faraday's law of electromagnetic induction 1. Experiments ① A magnet and ② two loops of wire,a loop of wire battery and a switch A current is observed in the loop as long as the magnetic flux through the loop is changing with time

§20.1 热力学基本概念 §20.2 热力学第一定律及其应用

一、波的叠加原理 1当几列波在传播过程中相遇时,相遇区域每一点的振动等于各列波单独传播时在该点引起的振动的矢量和。 2通过相遇区域以后,波保持各自特征继续传播,就和未相遇过一样

薛定谔方程及其应用 微观粒子的基本属性不能用经典语言确切表达, “波粒二象性”借用经典语言进行互补性描述。 对微观客体的数学描述可以脱离日常生活经验,避免 借用经典语言引起的表观矛盾。 量子力学包含一套计算规则及对数学程式的物理解 释,是建立在基本假设之上的构造性理论,其正确 性由实践检验

第四节 理想气体中的统计规律 第四节 理想气体中的统计规律及其应用

2.1 scalar and vector quantities 1. scalar Physical concepts that require only one numerical quantity for their complete specification are scalar quantities. 2. vector Vector quantities require for their complete specification a positive quantity, called the magnitude of the vector and the direction otice:Not all things with a magnitude and direction are vectors

1. Which of the following processes must violate the first law of thermodynamics?(There may be more than one answer!) ()W>0, 0, (C)W>0, 0, and AEint0,g>0,andEint<0

1. Which type of ideal gas will have the largest value for C-Cp? (D) (A)Monatomic (B)Diatomic (C)Polyatomic (D)The value will be the same for all. Solution: The difference between the molar specific heat at constant pressure and that at constant volume is

Chapter 3 Kinematics I: rectilinear motion Motion implies change, and it is change make life-and physics-visible and interesting. Kinematics is the theory about the description of motion. Physical theories are creations of the human intellect; they must be invented rather than discovered