Physics in our world: Twisting cats Satellites Origins of our view of the universe 110 Keplers laws of planetary motion 114 Newton,s law of universal gravitation The frontiers of physics: Measuring the distance to the Moon Spacecraft and orbital motion The frontiers of physics: The Global Positioning Satellite System 128 part 3: THE STRUCTURE OF MATTER Z ATOMS: BUILDING BLOCKS OF THE UNIVERSE The underlying structure of matter The Atomic Hypothesis concept of the ator irst models of the atom 346 Waves and quanta The bohr model of the atom 145 Molecules 147 Physics in our world: Winemaking 8 THE HEART OF THE ATOM THE NUCLEUS Raw material: Protons and neutrons Pioneers of physics: Heisenbergs failing grade The composition of the nucleus 153 The glue that keeps the nucleus together Size and shape of the nucleus Nuclear energy levels 9 FLUIDS 164 states of matter Buoyancy Surface tension and capillarity Fluids in motion The human cardiovascular system 6669868 Physics in our world: Curve balls ' $' 32; 32A 332 & ! % ! 332 $C % ! " 33B %C % ! & 33A $ " " 31B ! " 316 $ $ % ! 31A 5 *8 0/ 0/$ . 4 377 & ! " 377 " 377 ! " 37B . " ! " 37; < : 3B3 0 " ! " 3B6 * 3B5 ' 2! 3 3B= A . *8 / 363 % "8 363 4& 361 " ! 367 & ' & 366 ? ! 36= & 3;3 = . / 3;B ! " 3;B 3;6 3;; 0 35; ! 35= . " 3AB " " 3A; ' 3A5 +