CONTENTS 3
1．FORCE AND COMPOSITION OF FORCES 3
2．WEIGHT AND MASS 8
3．NEWTON’S FIRST LAW AND THIRD LAW 13
4．CENTER OF GRAVITY 18
5．NEWTON’S SECOND LAW 24
6．CONSERVATION OF ENERGY；WORK 29
7．CONSERVATIVE AND DISSIPATIVE FORCES 36
8．CENTRIPETAL AND CENTRIF UGALFORCES；AND MOMENT OF INERTIA 41
9．ELECTROSTATICS；CONSERVATION OF ELECTRIC CHARGE;INTENSITY OF ELECTRIC FIELD 49
10．POTENTIAL；ELECTROMOTIVE FORCE 55
11．METALS AS EQUIPOTENTIALS；MOTI ON OF CHARGED PAR-TICLES IN ELECTRIC FIELDS 61
12．COULOMB’S LAW；THE ELECTRIC DISPLACEMENT VECTOR 67
13．GAUSS’S LAW AND ITS APPLICATIONS 72
14．INDUCED CHARGES 78
15．CAPACITY COEFFICIENTS；CONDENSERS 82
16．LIGHT AS AWAVE MOTION（Ⅰ） 87
17．LIGHT AS A WAVE MOTION（Ⅱ） 92
18．VELOCITY OF LIGHT WAVES 97
19．WAVELENGTH 101
20．REELECTION AND REFRACTION OFWAVES 106
21．ABSORPTION AND SCATTERING 111
22．TIMING CIRCUITS 118
23．SYNCHRONIZATION 124
24．FREQUENCY DIVISION AND MULTIPLICATION 130
25．THYRATRON PULSE CIRCUITS 136
26．RADIOACTIVITY（Ⅰ） 143
27．RADIOACTIVITY（Ⅱ） 148
28．ARTIFICIAL NUCLEAR TRANSMUTATIONS AND NUCLEAR STRUCTURE 154
29．THE BUILDING BLOCKS OF ATOMIC NUCLEI（Ⅰ） 161
30．THE BUILDING BLOCKS OF ATOMIC NUCLEI（Ⅱ） 168
VOCABULARY 176