Physics 1 916 Mathematical physics 451 Quantum mechanics; Physics 388 Solid state physics; Properties of matter 268 Physical chemistry 262 Chemistry, Physical and theoretical 215 Atomic and Nuclear physics 187 Dissertations, Academic (Ph.D) 178 Nuclear physics 178 Chemistry 174 Physical Education 172 Thesis (Ph.D)-Physics 162 Solid state physics 139 Electronics engineering; Applied physics 138 Physical Science Teaching 135 Quantum theory 121 Sports 119 Particles (Nuclear physics) 108 PHYSICAL CHEMISTRY 105 Physical education 103 Statistical physics; Classical mechanics 94 Reports on progress in physics 92 Applied physics 90 Plasma physics; Properties of matter 90 Thermodynamics 90 Physical fitness 86 Mathematics 84 Physical education and training 82 Science 81 Theoretical physics 76