上海交通大学：《科学技术史 A History of Science and Technology》课程教学资源（PPT课件）07 现代物理学革命

1 Light waves and the coherent condition of waves 1. Light waves Light wave is a small part of the whole electromagnetic wave spectrum. Wavelength (m) 102

Collisions: All around us (cars, buses) Grand astronomical scale (stars, galexies) Nuclear, atomic and molecular physics The impulse-momentum theorem relates the change in the momentum of a system to the total force on it and the time interval during which this total forces acts

I．Choose the Correct Answer 1. An object is moving in a circle at constant speed v. The magnitude of the rate of change of momentum of the object （ C ）

I. Choose the Correct Answer 1. An object is moving along the x axis with position as a function of time given by x=x(). Point is at x 0. The object is definitely moving toward O when

上海交通大学：《科学技术史 A History of Science and Technology》课程教学资源（PPT课件）第10讲 20世纪的物理学革命

以上仅考虑了单个力学量的测量值和测量几率,两个或两个以上力学量的测量有什关 系? 在任意态v),力学量A的不确定度由方差决定 (△4)=w(a-(4)y)=),其中12=(-(4)y) 力学量B的不确定度由方差决定 (△B)=(B-(8)l)-gg),其中g)(2-)v A,B两个力学量的不确定关系由(④△)(△B)描述

1. The position vector and displacement Let the plane of the two-dimensional motion be the x-y plane of a Cartesian coordinate system

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